{"id":50470,"date":"2025-08-10T08:58:59","date_gmt":"2025-08-10T00:58:59","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/50470.html"},"modified":"2025-08-10T08:58:59","modified_gmt":"2025-08-10T00:58:59","slug":"24-c-%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/50470.html","title":{"rendered":"24 C++ \u6b63\u5219\u8868\u8fbe\u5f0f"},"content":{"rendered":"<h2>C&#043;&#043;\u6b63\u5219\u8868\u8fbe\u5f0f<\/h2>\n<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>C&#043;&#043;\u6b63\u5219\u8868\u8fbe\u5f0f<\/li>\n<li>\n<ul>\n<li>\u4e00\u3001\u6838\u5fc3\u7ec4\u4ef6<\/li>\n<li>\u4e8c \u5339\u914d\u64cd\u4f5c\u51fd\u6570<\/li>\n<li>\u4e09 \u57fa\u7840\u5b57\u7b26\u5339\u914d &#x1f31f;<\/li>\n<li>\n<ul>\n<li>1 \u7cbe\u786e\u5339\u914d<\/li>\n<li>2 \u5b57\u7b26\u96c6\u5408<\/li>\n<li>3 \u91cd\u590d\u5339\u914d&#xff08;\u91cf\u8bcd\u89c4\u5219&#xff09;<\/li>\n<li>4 \u4f4d\u7f6e\u951a\u5b9a\u89c4\u5219 &#x1f9e9;<\/li>\n<li>\n<ul>\n<li>1. \u5355\u8bcd\u8fb9\u754c<\/li>\n<li>2. \u8fb9\u754c\u63a7\u5236<\/li>\n<\/ul>\n<\/li>\n<li>5 \u6355\u83b7\u4e0e\u6570\u636e\u5206\u7ec4 &#x1f9ed;<\/li>\n<\/ul>\n<\/li>\n<li>\u56db \u5339\u914d\u51fd\u6570 &#x1f50d;<\/li>\n<li>1 \u5b50\u4e32\u641c\u7d22\u5339\u914d\u51fd\u6570&#xff1a;&#096;std::regex_search&#096;<\/li>\n<li>2 \u66ff\u6362\u5339\u914d\u5185\u5bb9&#xff1a;&#096;std::regex_replace&#096;<\/li>\n<li>3 \u8fed\u4ee3\u5339\u914d\u7ed3\u679c<\/li>\n<li>\u4e94 \u9ad8\u7ea7\u5339\u914d\u89c4\u5219&#x1f3af;<\/li>\n<li>\u516d \u5339\u914d\u63a7\u5236\u6807\u5fd7\u2699\ufe0f<\/li>\n<li>\n<ul>\n<li>1. \u5e38\u7528\u6807\u5fd7<\/li>\n<li>2. &#096;regex_constants&#096; \u547d\u540d\u7a7a\u95f4<\/li>\n<\/ul>\n<\/li>\n<li>\u4e03 \u6ce8\u610f\u4e8b\u9879 \u23f0<\/li>\n<li>[\u9644\u5f55]<\/li>\n<li>\n<ul>\n<li>&#x1f4ca; \u8fed\u4ee3\u5668\u5904\u7406\u51fd\u6570<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>\u4e00\u3001\u6838\u5fc3\u7ec4\u4ef6<\/h3>\n<li>\n<p>std::regex<\/p>\n<ul>\n<li>\n<p>\u5b58\u50a8\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5f0f\u3002<\/p>\n<\/li>\n<li>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">pattern<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(\\\\d{3}-\\\\d{2}-\\\\d{4})&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5339\u914dSSN\u683c\u5f0f&#xff1a;XXX-XX-XXXX<\/span>\n <\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5b58\u50a8\u5339\u914d\u7ed3\u679c\u7c7b<\/p>\n<ul>\n<li>std::smatch&#xff1a;\u5b58\u50a8\u5b57\u7b26\u4e32\u5339\u914d\u7ed3\u679c&#xff08;std::string&#xff09;\u3002<\/li>\n<li>std::cmatch&#xff1a;\u5b58\u50a8C\u98ce\u683c\u5b57\u7b26\u4e32\u5339\u914d\u7ed3\u679c&#xff08;const char*&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u6807\u5fd7&#xff08;\u63a7\u5236\u5339\u914d\u884c\u4e3a&#xff09;<\/p>\n<ul>\n<li>std::regex_constants::icase&#xff1a;\u5ffd\u7565\u5927\u5c0f\u5199\u3002<\/li>\n<li>std::regex_constants::ECMAScript&#xff1a;\u9ed8\u8ba4\u8bed\u6cd5\u3002<\/li>\n<\/ul>\n<\/li>\n<h3>\u4e8c \u5339\u914d\u64cd\u4f5c\u51fd\u6570<\/h3>\n<table>\n<tr>\u51fd\u6570\u53c2\u6570\u8fd4\u56de\u503c\u529f\u80fd\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>regex_match<\/td>\n<td>(\u5b57\u7b26\u4e32, \u6b63\u5219)<\/td>\n<td>bool<\/td>\n<td>\u9a8c\u8bc1\u5b8c\u6574\u5b57\u7b26\u4e32\u662f\u5426\u5339\u914d<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>(\u5b57\u7b26\u4e32, \u7ed3\u679c\u5bf9\u8c61, \u6b63\u5219)<\/td>\n<td>bool<\/td>\n<td>\u9a8c\u8bc1\u5e76\u5b58\u50a8\u6355\u83b7\u7ed3\u679c<\/td>\n<\/tr>\n<tr>\n<td>regex_search<\/td>\n<td>(\u5b57\u7b26\u4e32, \u6b63\u5219)<\/td>\n<td>bool<\/td>\n<td>\u641c\u7d22\u9996\u4e2a\u5339\u914d\u5b50\u4e32<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>(\u5b57\u7b26\u4e32, \u7ed3\u679c\u5bf9\u8c61, \u6b63\u5219)<\/td>\n<td>bool<\/td>\n<td>\u641c\u7d22\u5e76\u5b58\u50a8\u6355\u83b7\u7ed3\u679c<\/td>\n<\/tr>\n<tr>\n<td>regex_replace<\/td>\n<td>(\u5b57\u7b26\u4e32, \u6b63\u5219, \u66ff\u6362\u4e32)<\/td>\n<td>string<\/td>\n<td>\u66ff\u6362\u6240\u6709\u5339\u914d\u5185\u5bb9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u4e09 \u57fa\u7840\u5b57\u7b26\u5339\u914d &#x1f31f;<\/h3>\n<h4>1 \u7cbe\u786e\u5339\u914d<\/h4>\n<ul>\n<li>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    string str1 <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;Abc B&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    string str2 <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;Abc B&#034;<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/<\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span> str2 <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>smatch match<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>str1<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        cout<span class=\"token operator\">&lt;&lt;<\/span>str1<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>\n <\/li>\n<\/ul>\n<p>Abc B \u548c Abc B \u5339\u914d<\/p>\n<li>\n<p>\u5b57\u9762\u5b57\u7b26<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;abc&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u7cbe\u786e\u5339\u914d &#034;abc&#034;<\/span>\n <\/li>\n<li>\n<p>\u7279\u6b8a\u5b57\u7b26\u8f6c\u4e49<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(\\\\.\\\\?\\\\*\\\\&#043;\\\\^\\\\$\\\\(\\\\))&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5339\u914d .?*&#043;^$()<\/span>\n <\/li>\n<li>\n<p>\u901a\u914d\u7b26<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;a.c&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5339\u914d a\u548cc\u4e4b\u95f4\u4efb\u610f\u5b57\u7b26 (\u5982 &#034;abc&#034;, &#034;axc&#034;)<\/span>\n <\/li>\n<ul>\n<li>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p> include <span class=\"token operator\">&lt;<\/span>iostream<span class=\"token operator\">&gt;<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    string str1 <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;Abc B&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    string str2 <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;Abc.B&#034;<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/<\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span> str2 <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>smatch match<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>str1<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        cout<span class=\"token operator\">&lt;&lt;<\/span>str1<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>match<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    str1 <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;AbcxB&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>str1<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        cout<span class=\"token operator\">&lt;&lt;<\/span>str1<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    str1 <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;Abc B&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>str1<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        cout<span class=\"token operator\">&lt;&lt;<\/span>str1<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    str1 <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;.?*&#043;^$()&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    str2 <span class=\"token operator\">&#061;<\/span><span class=\"token raw-string string\">R&#034;(\\\\.\\\\?\\\\*\\\\&#043;\\\\^\\\\$\\\\(\\\\))&#034;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5339\u914d .?*&#043;^$()<\/span><br \/>\n    <span class=\"token comment\">\/\/ re( str2 ); \u5fc5\u987b\u4f7f\u7528 assign() \u65b9\u6cd5&#xff1a;<\/span><br \/>\n    re<span class=\"token punctuation\">.<\/span><span class=\"token function\">assign<\/span><span class=\"token punctuation\">(<\/span>str2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u2705 \u6b63\u786e&#xff1a;\u4fee\u6539\u73b0\u6709\u7684 std::regex \u5bf9\u8c61 <\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>str1<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        cout<span class=\"token operator\">&lt;&lt;<\/span>str1<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa&#xff1a;<\/p>\n<p>   Abc B \u548c Abc B \u5339\u914d<br \/>\nAbcxB \u548c Abc.B \u5339\u914d<br \/>\nAbc B \u548c Abc.B \u5339\u914d<br \/>\n.?*&#043;^$() \u548c \\\\.\\\\?\\\\*\\\\&#043;\\\\^\\\\$\\\\(\\\\) \u5339\u914d<\/p>\n<\/li>\n<li>\n<p>\u6b63\u5219\u8868\u8fbe\u5f0f&#xff1a;R&#034;(\\\\.\\\\?\\\\*\\\\&#043;\\\\^\\\\$\\\\(\\\\))&#034;  \\\\. \u5339\u914d . \\\\? \u5339\u914d ? \\\\* \u5339\u914d * \\\\&#043; \u5339\u914d &#043; \\\\^ \u5339\u914d ^ \\\\$ \u5339\u914d $ \\\\( \u5339\u914d ( \\\\) \u5339\u914d )<\/p>\n<\/li>\n<li>\n<p>\u539f\u59cb\u5b57\u7b26\u4e32\u5b57\u9762\u91cf&#xff08;Raw String Literal&#xff09;&#xff1a;<\/p>\n<ul>\n<li>R&#034;(&#8230;)&#034;\u662f C&#043;&#043;11 \u5f15\u5165\u7684\u539f\u59cb\u5b57\u7b26\u4e32\u8bed\u6cd5&#xff0c;\u907f\u514d\u4e86\u5bf9\u53cd\u659c\u6760 \\\\ \u7684\u989d\u5916\u8f6c\u4e49\u3002<\/li>\n<li>\u5982\u679c\u4e0d\u4f7f\u7528\u539f\u59cb\u5b57\u7b26\u4e32&#xff0c;\u6b63\u5219\u8868\u8fbe\u5f0f\u9700\u8981\u5199\u6210 &#034;\\\\\\\\.\\\\\\\\?\\\\\\\\*\\\\\\\\&#043;\\\\\\\\^\\\\\\\\$\\\\\\\\(\\\\\\\\)&#034;&#xff08;\u9700\u8981\u53cc\u91cd\u8f6c\u4e49&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>re( str2 ); std::regex \u6ca1\u6709 operator()&#xff0c;\u6240\u4ee5\u4e0d\u80fd\u50cf\u51fd\u6570\u4e00\u6837\u8c03\u7528\u3002 \u60f3\u4fee\u6539\u5b83\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5f0f&#xff0c;\u5fc5\u987b\u4f7f\u7528 assign() \u65b9\u6cd5\u3002<\/p>\n<\/li>\n<\/ul>\n<h4>2 \u5b57\u7b26\u96c6\u5408<\/h4>\n<li>\n<p>\u81ea\u5b9a\u4e49\u5b57\u7b26\u96c6<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">hex<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;[0-9A-F]&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5341\u516d\u8fdb\u5236\u5b57\u7b26<\/span>\n <\/li>\n<li>\n<p>\u53cd\u5411\u96c6\u5408<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">non_digit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;[^0-9]&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u975e\u6570\u5b57<\/span>\n <\/li>\n<li>\n<p>\u9884\u5b9a\u4e49\u5b57\u7b26\u7c7b<\/p>\n<table>\n<tr>\u8868\u8fbe\u5f0f\u7b49\u6548\u5b57\u7b26\u96c6\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>\\\\d<\/td>\n<td>[0-9]<\/td>\n<td>\u6570\u5b57<\/td>\n<\/tr>\n<tr>\n<td>\\\\D<\/td>\n<td>[^0-9]<\/td>\n<td>\u975e\u6570\u5b57<\/td>\n<\/tr>\n<tr>\n<td>\\\\s<\/td>\n<td>[ \\\\t\\\\n\\\\r\\\\f\\\\v]<\/td>\n<td>\u7a7a\u767d\u7b26<\/td>\n<\/tr>\n<tr>\n<td>\\\\S<\/td>\n<td>[^ \\\\t\\\\n\\\\r\\\\f\\\\v]<\/td>\n<td>\u975e\u7a7a\u767d\u7b26<\/td>\n<\/tr>\n<tr>\n<td>\\\\w<\/td>\n<td>[a-zA-Z0-9_]<\/td>\n<td>\u5355\u8bcd\u5b57\u7b26<\/td>\n<\/tr>\n<tr>\n<td>\\\\W<\/td>\n<td>[^a-zA-Z0-9_]<\/td>\n<td>\u975e\u5355\u8bcd\u5b57\u7b26<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<ul>\n<li>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    string id <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;2&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/ string str2 &#061;R&#034;(\\\\d)&#034;;    \/\/ \u5339\u914d\u4efb\u4e00\u4e2a\u6570\u5b57<\/span><br \/>\n    string str2 <span class=\"token operator\">&#061;<\/span><span class=\"token raw-string string\">R&#034;([0-9])&#034;<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u5339\u914d\u4efb\u4e00\u4e2a\u6570\u5b57<\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span> str2 <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>smatch match<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    id <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;202&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span> <span class=\"token operator\">!&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u4e0d\u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    id <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;C&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span> <span class=\"token operator\">!&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u4e0d\u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c:<\/p>\n<p>      <span class=\"token number\">2<\/span> \u548c <span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">9<\/span><span class=\"token punctuation\">]<\/span> \u5339\u914d<br \/>\n   <span class=\"token number\">202<\/span> \u548c <span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">9<\/span><span class=\"token punctuation\">]<\/span> \u4e0d\u5339\u914d<br \/>\n   C \u548c <span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">9<\/span><span class=\"token punctuation\">]<\/span> \u4e0d\u5339\u914d<\/p>\n<\/li>\n<\/ul>\n<h4>3 \u91cd\u590d\u5339\u914d&#xff08;\u91cf\u8bcd\u89c4\u5219&#xff09;<\/h4>\n<li>\n<p>\u57fa\u7840\u91cf\u8bcd<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(\\\\d{3,5})&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5339\u914d3\u52305\u4f4d\u6570\u5b57<\/span><\/p>\n<p>std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;a{3}&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u7cbe\u786e3\u6b21: &#034;aaa&#034;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;a{2,4}&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ 2\u52304\u6b21: &#034;aa&#034;,&#034;aaa&#034;,&#034;aaaa&#034;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re3<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;a&#043;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ 1\u6b21\u6216\u591a\u6b21 \u2248 {1,}<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re4<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;a*&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ 0\u6b21\u6216\u591a\u6b21 \u2248 {0,}<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re5<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;a?&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ 0\u62161\u6b21 \u2248 {0,1}<\/span>\n <\/li>\n<li>\n<p>\u7279\u6b8a\u91cf\u8bcd<\/p>\n<table>\n<tr>\u91cf\u8bcd\u8bf4\u660e\u7b49\u6548\u5f62\u5f0f<\/tr>\n<tbody>\n<tr>\n<td>*<\/td>\n<td>0\u6b21\u6216\u591a\u6b21<\/td>\n<td>{0,}<\/td>\n<\/tr>\n<tr>\n<td>&#043;<\/td>\n<td>1\u6b21\u6216\u591a\u6b21<\/td>\n<td>{1,}<\/td>\n<\/tr>\n<tr>\n<td>?<\/td>\n<td>0\u6b21\u62161\u6b21<\/td>\n<td>{0,1}<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li>\n<p>\u793a\u4f8b:<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    string id <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;ABCD EFG&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/ string str2 &#061;R&#034;(\\\\D{8})&#034;;    \/\/ \u5339\u914d8\u4f4d\u975e\u6570\u5b57<\/span><br \/>\n    string str2 <span class=\"token operator\">&#061;<\/span><span class=\"token raw-string string\">R&#034;([^0-9]{8})&#034;<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u5339\u914d8\u4f4d\u975e\u6570\u5b57<\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span> str2 <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>smatch match<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    id <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;ABCD 2FG&#034;<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u6709\u6570\u5b57<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span> <span class=\"token operator\">!&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u4e0d\u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    id <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;ABCD &#034;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6570\u4f4d\u4e0d\u591f<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span> <span class=\"token operator\">!&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u4e0d\u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c:<\/p>\n<p>     ABCD EFG \u548c <span class=\"token punctuation\">[<\/span><span class=\"token operator\">^<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">9<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">8<\/span><span class=\"token punctuation\">}<\/span> \u5339\u914d<br \/>\nABCD <span class=\"token number\">2F<\/span>G \u548c <span class=\"token punctuation\">[<\/span><span class=\"token operator\">^<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">9<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">8<\/span><span class=\"token punctuation\">}<\/span> \u4e0d\u5339\u914d<br \/>\nABCD  \u548c <span class=\"token punctuation\">[<\/span><span class=\"token operator\">^<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">9<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">8<\/span><span class=\"token punctuation\">}<\/span> \u4e0d\u5339\u914d<\/p>\n<\/li>\n<li>\n<p>[a-g] \u8868\u793a \u5339\u914d\u5355\u4e2a\u5b57\u7b26&#xff0c;\u4e14\u8be5\u5b57\u7b26\u5fc5\u987b\u662fa\u3001b\u3001c\u3001d\u3001e\u3001f\u6216g\u4e2d\u7684\u4e00\u4e2a\u3002<\/p>\n<\/li>\n<li>\n<p>[a-g]&#043; \u8868\u793a \u5339\u914d\u4efb\u610f\u957f\u5ea6\u5305\u542b\u6709 a-g \u5b57\u7b26\u4e32<\/p>\n<\/li>\n<li>\n<p>(?!cde$)[a-g]&#043;\u5339\u914d\u5305\u542b\u6709 a-g\u5b57\u7b26\u4e32&#xff0c;\u4f46\u4e0d\u80fd\u662f &#034;cde&#034;\u5b57\u7b26\u4e32<\/p>\n<\/li>\n<li>\n<p>[a-g]{1,6}|[a-g]{8,}\u5339\u914d\u957f\u5ea6 \u22607 \u7684 a-g \u5b57\u7b26\u4e32(6\u4e2a\u6216\u80058\u4e2a\u4ee5\u4e0a\u7684\u957f\u5ea6)<\/p>\n<\/li>\n<li>\n<p>\u793a\u4f8b:<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    string id <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;abcdedgh&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    string str2 <span class=\"token operator\">&#061;<\/span><span class=\"token raw-string string\">R&#034;([a-z]{8})&#034;<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u5339\u914d8\u4e2a\u5c0f\u5199\u5b57\u6bcd<\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span> str2 <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>smatch match<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    id <span class=\"token operator\">&#061;<\/span>id <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;b&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    str2 <span class=\"token operator\">&#061;<\/span><span class=\"token raw-string string\">R&#034;([a-g])&#034;<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ \u53ef\u4ee5\u662f a\u3001b\u3001c\u3001d\u3001e\u3001f\u3001g \u4e2d\u7684\u4efb\u610f\u4e00\u4e2a <\/span><br \/>\n    re<span class=\"token punctuation\">.<\/span><span class=\"token function\">assign<\/span><span class=\"token punctuation\">(<\/span>str2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">else<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u4e0d\u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><\/p>\n<p>    id <span class=\"token operator\">&#061;<\/span>id <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;abcded&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    str2 <span class=\"token operator\">&#061;<\/span><span class=\"token raw-string string\">R&#034;([a-g]&#043;)&#034;<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u5339\u914d\u4efb\u610f\u957f\u5ea6\u7684 a-g \u5b57\u7b26\u4e32<\/span><br \/>\n    re<span class=\"token punctuation\">.<\/span><span class=\"token function\">assign<\/span><span class=\"token punctuation\">(<\/span>str2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">else<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u4e0d\u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <\/p>\n<p>    id <span class=\"token operator\">&#061;<\/span>id <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;abcdedg&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    str2 <span class=\"token operator\">&#061;<\/span><span class=\"token raw-string string\">R&#034;([a-g]&#043;)&#034;<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u5339\u914d\u4efb\u610f\u957f\u5ea6\u5305\u542b\u6709 a-g \u5b57\u7b26\u4e32<\/span><br \/>\n    re<span class=\"token punctuation\">.<\/span><span class=\"token function\">assign<\/span><span class=\"token punctuation\">(<\/span>str2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">else<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u4e0d\u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <\/p>\n<p>    id <span class=\"token operator\">&#061;<\/span>id <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;abcdedg&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    str2 <span class=\"token operator\">&#061;<\/span><span class=\"token raw-string string\">R&#034;((?!cde$)[a-g]&#043;)&#034;<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ \u5339\u914d\u5305\u542b\u6709 a-g \u5b57\u7b26\u4e32&#xff0c;\u4f46\u4e0d\u80fd\u662f &#034;cde&#034;\u5b57\u7b26\u4e32<\/span><br \/>\n    re<span class=\"token punctuation\">.<\/span><span class=\"token function\">assign<\/span><span class=\"token punctuation\">(<\/span>str2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">else<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u4e0d\u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <\/p>\n<p>    id <span class=\"token operator\">&#061;<\/span>id <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;cde&#034;<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u5339\u914d\u5305\u542b\u6709 a-g \u5b57\u7b26\u4e32&#xff0c;\u4f46\u4e0d\u80fd\u662f &#034;cde&#034;\u5b57\u7b26\u4e32<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">else<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u4e0d\u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <\/p>\n<p>    cout<span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c:<\/p>\n<p>     abcdedgh \u548c <span class=\"token punctuation\">[<\/span>a<span class=\"token operator\">&#8211;<\/span>z<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">8<\/span><span class=\"token punctuation\">}<\/span> \u5339\u914d<br \/>\nb \u548c <span class=\"token punctuation\">[<\/span>a<span class=\"token operator\">&#8211;<\/span>g<span class=\"token punctuation\">]<\/span> \u5339\u914d<br \/>\nabcded \u548c <span class=\"token punctuation\">[<\/span>a<span class=\"token operator\">&#8211;<\/span>g<span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#043;<\/span> \u5339\u914d<br \/>\nabcdedg \u548c <span class=\"token punctuation\">[<\/span>a<span class=\"token operator\">&#8211;<\/span>g<span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#043;<\/span> \u5339\u914d<br \/>\nabcdedg \u548c <span class=\"token punctuation\">(<\/span><span class=\"token operator\">?<\/span><span class=\"token operator\">!<\/span>cde$<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">[<\/span>a<span class=\"token operator\">&#8211;<\/span>g<span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#043;<\/span> \u5339\u914d<br \/>\ncde \u548c <span class=\"token punctuation\">(<\/span><span class=\"token operator\">?<\/span><span class=\"token operator\">!<\/span>cde$<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">[<\/span>a<span class=\"token operator\">&#8211;<\/span>g<span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#043;<\/span> \u4e0d\u5339\u914d<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u8d2a\u5a6a\/\u60f0\u6027\u6a21\u5f0f \u901a\u5e38\u7528\u4e8e\u67e5\u627e\u5b50\u5b57\u7b26\u4e32<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">greedy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;&lt;.*&gt;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u5339\u914d\u6574\u4e2a\u6807\u7b7e\u5185\u5bb9,\u4f1a\u5339\u914d \u4ece\u7b2c\u4e00\u4e2a &lt; \u5230\u6700\u540e\u4e00\u4e2a &gt;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">lazy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;&lt;.*?&gt;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u5339\u914d\u6700\u77ed\u6807\u7b7e,\u4f1a\u5339\u914d \u4ece\u7b2c\u4e00\u4e2a &lt; \u5230 &gt; \u4e4b\u95f4\u7684\u6700\u77ed\u4e32\u4e00\u4e2a\u5b57\u7b26\u4e32<\/span><\/p>\n<p>std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">greedy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;a.*b&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u8d2a\u5a6a\u6a21\u5f0f&#xff1a;\u5339\u914d\u6700\u957f\u4e32,\u4f1a\u5339\u914d \u4ece\u7b2c\u4e00\u4e2a a \u5230 b \u4e4b\u95f4\u7684<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">lazy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;a.*?b&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u60f0\u6027\u6a21\u5f0f&#xff1a;\u5339\u914d\u6700\u77ed\u4e32,\u4f1a\u5339\u914d \u4ece\u7b2c\u4e00\u4e2a a \u5230 b \u4e4b\u95f4\u7684\u6700\u77ed\u4e32\u4e00\u4e2a\u5b57\u7b26\u4e32<\/span><br \/>\n string str1 <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;ac&lt;b&gt;def&lt;\/b&gt;xyz&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex re1 <span class=\"token operator\">&#061;<\/span><span class=\"token raw-string string\">R&#034;(&lt;.*&gt;)&#034;<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/  \u5339\u914d\u6807\u7b7e&lt;b&gt;def&lt;\/b&gt;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex re2 <span class=\"token operator\">&#061;<\/span><span class=\"token raw-string string\">R&#034;(&lt;.*?&gt;)&#034;<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/  \u5339\u914d\u6807\u7b7e&lt;b&gt; <\/span>\n <\/li>\n<h4>4 \u4f4d\u7f6e\u951a\u5b9a\u89c4\u5219 &#x1f9e9;<\/h4>\n<h5>1. \u5355\u8bcd\u8fb9\u754c<\/h5>\n<p>\u2705 \\\\b \u7684\u6838\u5fc3\u903b\u8f91&#xff1a;\u901a\u8fc7 \\\\w \u548c \\\\W \u7684\u5dee\u5f02\u5b9a\u4f4d\u5355\u8bcd\u8fb9\u754c&#xff0c;\u9002\u5408\u7cbe\u786e\u5339\u914d\u72ec\u7acb\u5355\u8bcd<\/p>\n<p>std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(\\\\bword\\\\b)&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5339\u914d\u72ec\u7acb\u5355\u8bcd<\/span><\/p>\n<ul>\n<li>\n<p>\\\\bword\\\\b \u786e\u4fdd &#034;word&#034; \u524d\u540e\u662f\u5355\u8bcd\u8fb9\u754c&#xff08;\u5982\u7a7a\u683c\u3001\u6807\u70b9\u6216\u5b57\u7b26\u4e32\u5f00\u5934\/\u7ed3\u5c3e&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u4e0d\u4f1a\u5339\u914d &#034;keyword&#034; \u6216 &#034;sword&#034; \u4e2d\u7684 &#034;word&#034;\u3002<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;word&#034;<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u72ec\u7acb\u5355\u8bcd <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(\\\\bword\\\\b)&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5fc5\u987b\u5b8c\u5168\u5339\u914d &#034;word&#034;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>text<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u5339\u914d\u6210\u529f: \\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> text <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034; \u662f\u4e00\u4e2a\u72ec\u7acb\u5355\u8bcd\u3002&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token comment\">\/\/\u5339\u914d\u6210\u529f: &#034;word&#034; \u662f\u4e00\u4e2a\u72ec\u7acb\u5355\u8bcd\u3002<\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>smatch match<span class=\"token punctuation\">;<\/span><br \/>\n    text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;This is a sword and word example.&#034;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ &#034;word&#034; \u662f\u5b50\u4e32 <\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>text<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u627e\u5230\u72ec\u7acb\u5355\u8bcd: \\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><br \/>\n                <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034; \u5728\u4f4d\u7f6e &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">.<\/span><span class=\"token function\">position<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token comment\">\/\/\u627e\u5230\u72ec\u7acb\u5355\u8bcd: &#034;word&#034; \u5728\u4f4d\u7f6e 20<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>\n <\/li>\n<li>\n<p>regex_match vs regex_search &#8211; regex_match&#xff1a;\u6574\u4e2a\u5b57\u7b26\u4e32\u5fc5\u987b\u5b8c\u5168\u5339\u914d\u6b63\u5219\u8868\u8fbe\u5f0f&#xff08;\u9002\u5408\u9a8c\u8bc1\u72ec\u7acb\u5355\u8bcd&#xff09;\u3002 &#8211; regex_search&#xff1a;\u5b57\u7b26\u4e32\u4e2d\u53ea\u8981\u5305\u542b\u5339\u914d\u5373\u53ef&#xff08;\u9002\u5408\u5728\u53e5\u5b50\u4e2d\u67e5\u627e\u5355\u8bcd&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\\\\b \u662f\u5339\u914d\u5355\u8bcd\u8fb9\u754c&#xff1a;\\\\w \u548c \\\\W \u4e4b\u95f4\u7684\u4f4d\u7f6e&#xff0c;\u662f \u4f4d\u7f6e&#xff08;\u96f6\u5bbd\u5ea6\u65ad\u8a00&#xff09;&#xff0c;\u800c\u4e0d\u662f\u5177\u4f53\u7684\u5b57\u7b26\u3002 \u4f8b\u5982&#xff0c;\\\\b \u5339\u914d\u4ee5\u4e0b\u4e24\u79cd\u4f4d\u7f6e&#xff1a; 1. \\\\w \u548c \\\\W \u4e4b\u95f4&#xff08;\u5355\u8bcd\u5b57\u7b26\u540e\u63a5\u975e\u5355\u8bcd\u5b57\u7b26&#xff0c;\u5982 &#034;word!&#034; \u4e2d\u7684 d \u548c !&#xff09;\u3002 2. \\\\W \u548c \\\\w \u4e4b\u95f4&#xff08;\u975e\u5355\u8bcd\u5b57\u7b26\u540e\u63a5\u5355\u8bcd\u5b57\u7b26&#xff0c;\u5982 &#034;!word&#034; \u4e2d\u7684 ! \u548c w&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u81ea\u5b9a\u4e49\u5355\u8bcd\u8fb9\u754c<\/p>\n<ul>\n<li>\n<p>\\\\b \u4e0d\u5339\u914d\u4e0b\u5212\u7ebf _&#xff0c;\u56e0\u4e3a _ \u5c5e\u4e8e \\\\w\u3002<\/p>\n<p> std<span class=\"token operator\">::<\/span>string text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;word_word&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(\\\\bword\\\\b)&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u4e0d\u5339\u914d&#xff0c;\u56e0\u4e3a &#096;_&#096; \u662f &#096;\\\\w&#096;\u96c6\u5408&#xff0c;&#096;word&#096; \u524d\u540e\u6ca1\u6709\u5355\u8bcd\u8fb9\u754c <\/span>\n <\/li>\n<li>\n<p>\\\\b \u4f1a\u5339\u914d\u5e26\u8fde\u5b57\u7b26-\u7684\u5355\u8bcd&#xff0c;- \u4e0d\u662f \\\\w&#xff0c;\u4f1a\u89e6\u53d1\u5355\u8bcd\u8fb9\u754c \u4f8b\u5982 &#034;well-known&#034; \u5982\u679c\u9ed8\u8ba4\u7684 \\\\w \u4e0d\u7b26\u5408\u9700\u6c42&#xff08;\u4f8b\u5982\u4e0d\u60f3\u5c06 _ \u89c6\u4e3a\u5355\u8bcd\u5b57\u7b26&#xff09;&#xff0c;\u53ef\u4ee5\u663e\u5f0f\u5b9a\u4e49\u8fb9\u754c&#xff1a;<\/p>\n<p> std<span class=\"token operator\">::<\/span>string text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;word_word&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u53ea\u5141\u8bb8\u5b57\u6bcd\u548c\u6570\u5b57\u4f5c\u4e3a\u5355\u8bcd\u5b57\u7b26&#xff08;\u6392\u9664 &#096;_&#096;&#xff09;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;((?&lt;![a-zA-Z0-9])word(?![a-zA-Z0-9]))&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>(?&lt;![a-zA-Z0-9])&#xff1a;\u524d\u9762\u4e0d\u80fd\u662f\u5b57\u6bcd\u6216\u6570\u5b57&#xff08;\u8d1f\u5411\u540e\u987e&#xff09;\u3002<\/li>\n<li>(?![a-zA-Z0-9])&#xff1a;\u540e\u9762\u4e0d\u80fd\u662f\u5b57\u6bcd\u6216\u6570\u5b57&#xff08;\u8d1f\u5411\u5148\u884c&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h5>2. \u8fb9\u754c\u63a7\u5236<\/h5>\n<p>\u2705 ^ \u548c $ \u662f\u951a\u70b9&#xff08;anchors&#xff09;&#xff0c;\u7528\u4e8e\u7cbe\u51c6\u5b9a\u4f4d\u5339\u914d\u4f4d\u7f6e\u3002<\/p>\n<ul>\n<li>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;^Start&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u5b57\u7b26\u4e32 Start \u8d77\u59cb<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;End$&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \u5b57\u7b26\u4e32 End \u7ed3\u675f<\/span>\n <\/li>\n<li>\n<p>\u5ffd\u7565\u5927\u5c0f\u5199\u7684\u8fb9\u754c\u63a7\u5236 \u901a\u8fc7 std::regex::icase \u6807\u5fd7\u5b9e\u73b0&#xff1a;<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;^start&#034;<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>regex<span class=\"token operator\">::<\/span>icase<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5339\u914d &#034;Start&#034;\u3001&#034;START&#034; \u7b49 <\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;end$&#034;<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>regex<span class=\"token operator\">::<\/span>icase<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u5339\u914d &#034;End&#034;\u3001&#034;END&#034; \u7b49 <\/span>\n <\/li>\n<li>\n<p>\u5b8c\u6574\u793a\u4f8b&#xff1a;<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u6d4b\u8bd5\u5b57\u7b26\u4e32 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string str1 <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Start of the day&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string str2 <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;The End&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string str3 <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Start and End&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string str4 <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Middle of the road&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5b9a\u4e49\u6b63\u5219\u8868\u8fbe\u5f0f <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;^Start&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5339\u914d\u4ee5 &#034;Start&#034; \u5f00\u5934\u7684\u5b57\u7b26\u4e32 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;End$&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u5339\u914d\u4ee5 &#034;End&#034; \u7ed3\u5c3e\u7684\u5b57\u7b26\u4e32 <\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6d4b\u8bd5 re1: \u5339\u914d\u5f00\u5934 <\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str1<span class=\"token punctuation\">,<\/span> re1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> str1 <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034; \u4ee5 &#039;Start&#039; \u5f00\u5934&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> str1 <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034; \u4e0d\u4ee5 &#039;Start&#039; \u5f00\u5934&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6d4b\u8bd5 re2: \u5339\u914d\u7ed3\u5c3e <\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str2<span class=\"token punctuation\">,<\/span> re2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> str2 <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034; \u4ee5 &#039;End&#039; \u7ed3\u5c3e&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> str2 <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034; \u4e0d\u4ee5 &#039;End&#039; \u7ed3\u5c3e&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6d4b\u8bd5\u540c\u65f6\u5339\u914d\u5f00\u5934\u548c\u7ed3\u5c3e <\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str3<span class=\"token punctuation\">,<\/span> re1<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;&amp;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str3<span class=\"token punctuation\">,<\/span> re2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> str3 <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034; \u4ee5 &#039;Start&#039; \u5f00\u5934\u4e14\u4ee5 &#039;End&#039; \u7ed3\u5c3e&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> str3 <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034; \u4e0d\u6ee1\u8db3\u6761\u4ef6&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6d4b\u8bd5\u4e0d\u5339\u914d\u7684\u60c5\u51b5 <\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str4<span class=\"token punctuation\">,<\/span> re1<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token operator\">!<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str4<span class=\"token punctuation\">,<\/span> re2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> str4 <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034; \u65e2\u4e0d\u4ee5 &#039;Start&#039; \u5f00\u5934&#xff0c;\u4e5f\u4e0d\u4ee5 &#039;End&#039; \u7ed3\u5c3e&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c:<\/p>\n<p>   <span class=\"token string\">&#034;Start of the day&#034;<\/span> \u4ee5 <span class=\"token string\">&#039;Start&#039;<\/span> \u5f00\u5934<br \/>\n<span class=\"token string\">&#034;The End&#034;<\/span> \u4ee5 <span class=\"token string\">&#039;End&#039;<\/span> \u7ed3\u5c3e<br \/>\n<span class=\"token string\">&#034;Start and End&#034;<\/span> \u4ee5 <span class=\"token string\">&#039;Start&#039;<\/span> \u5f00\u5934\u4e14\u4ee5 <span class=\"token string\">&#039;End&#039;<\/span> \u7ed3\u5c3e<br \/>\n<span class=\"token string\">&#034;Middle of the road&#034;<\/span> \u65e2\u4e0d\u4ee5 <span class=\"token string\">&#039;Start&#039;<\/span> \u5f00\u5934&#xff0c;\u4e5f\u4e0d\u4ee5 <span class=\"token string\">&#039;End&#039;<\/span> \u7ed3\u5c3e <\/p>\n<\/li>\n<\/ul>\n<p>[\u5173\u952e\u70b9\u89e3\u6790]<\/p>\n<ul>\n<li>\n<p>^ \u8868\u793a\u5339\u914d\u5b57\u7b26\u4e32\u7684\u5f00\u5934\u3002<\/p>\n<\/li>\n<li>\n<p>$ \u8868\u793a\u5339\u914d\u5b57\u7b26\u4e32\u7684\u7ed3\u5c3e\u3002<\/p>\n<\/li>\n<li>\n<p>\u5b8c\u6574\u793a\u4f8b&#xff1a;<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u6d4b\u8bd5\u5b57\u7b26\u4e32 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string str1 <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u4e24\u4e2a\u9ec4\u9e42\u9e23\u7fe0\u67f3&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string str2 <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u4e00\u884c\u767d\u9e6d\u4e0a\u9752\u5929&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string str3 <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u4e24\u4e2a\u9ec4\u9e42\u9e23\u7fe0\u67f3&#xff0c;\u4e00\u884c\u767d\u9e6d\u4e0a\u9752\u5929&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string str4 <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u4e24\u4e2a\u9ec4\u9e42\u9e23\u7fe0\u67f3&#xff0c;\u591c\u8bdd\u767d\u9e6d\u56db\u6761\u817f&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5b9a\u4e49\u6b63\u5219\u8868\u8fbe\u5f0f <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;^\u4e24\u4e2a&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5339\u914d\u4ee5 &#034;\u4e24\u4e2a&#034; \u5f00\u5934\u7684\u5b57\u7b26\u4e32 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5929$&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u5339\u914d\u4ee5 &#034;\u5929&#034; \u7ed3\u5c3e\u7684\u5b57\u7b26\u4e32 <\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6d4b\u8bd5 re1: \u5339\u914d\u5f00\u5934 <\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str1<span class=\"token punctuation\">,<\/span> re1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> str1 <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034;\u4ee5 \\\\&#034;\u4e24\u4e2a\\\\&#034; \u5f00\u5934&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6d4b\u8bd5 re2: \u5339\u914d\u7ed3\u5c3e <\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str2<span class=\"token punctuation\">,<\/span> re2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> str2 <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034; \u4ee5 \\\\&#034;\u5929\\\\&#034; \u7ed3\u5c3e&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <\/p>\n<p>    <span class=\"token comment\">\/\/ \u6d4b\u8bd5\u540c\u65f6\u5339\u914d\u5f00\u5934\u548c\u7ed3\u5c3e <\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str3<span class=\"token punctuation\">,<\/span> re1<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;&amp;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str3<span class=\"token punctuation\">,<\/span> re2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> str3 <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034; \u4ee5 \\\\&#034;\u4e24\u4e2a\\\\&#034; \u5f00\u5934\u4e14\u4ee5 \\\\&#034;\u5929\\\\&#034; \u7ed3\u5c3e&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> str3 <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034; \u4e0d\u6ee1\u8db3\u6761\u4ef6&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6d4b\u8bd5\u5339\u914d\u548c\u4e0d\u5339\u914d\u7684\u60c5\u51b5 <\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str4<span class=\"token punctuation\">,<\/span> re1<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token operator\">!<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str4<span class=\"token punctuation\">,<\/span> re2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> str4 <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034; \u4ee5 \\\\&#034;\u4e24\u4e2a\\\\&#034; \u5f00\u5934&#xff0c;\u4e0d\u4ee5 \\\\&#034;\u5929\\\\&#034; \u7ed3\u5c3e&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c&#xff1a;<\/p>\n<p>   <span class=\"token string\">&#034;\u4e24\u4e2a\u9ec4\u9e42\u9e23\u7fe0\u67f3&#034;<\/span>\u4ee5 <span class=\"token string\">&#034;\u4e24\u4e2a&#034;<\/span> \u5f00\u5934<br \/>\n<span class=\"token string\">&#034;\u4e00\u884c\u767d\u9e6d\u4e0a\u9752\u5929&#034;<\/span> \u4ee5 <span class=\"token string\">&#034;\u5929&#034;<\/span> \u7ed3\u5c3e<br \/>\n<span class=\"token string\">&#034;\u4e24\u4e2a\u9ec4\u9e42\u9e23\u7fe0\u67f3&#xff0c;\u4e00\u884c\u767d\u9e6d\u4e0a\u9752\u5929&#034;<\/span> \u4ee5 <span class=\"token string\">&#034;\u4e24\u4e2a&#034;<\/span> \u5f00\u5934\u4e14\u4ee5 <span class=\"token string\">&#034;\u5929&#034;<\/span> \u7ed3\u5c3e<br \/>\n<span class=\"token string\">&#034;\u4e24\u4e2a\u9ec4\u9e42\u9e23\u7fe0\u67f3&#xff0c;\u591c\u8bdd\u767d\u9e6d\u56db\u6761\u817f&#034;<\/span> \u4ee5 <span class=\"token string\">&#034;\u4e24\u4e2a&#034;<\/span> \u5f00\u5934&#xff0c;\u4e0d\u4ee5 <span class=\"token string\">&#034;\u5929&#034;<\/span> \u7ed3\u5c3e<\/p>\n<\/li>\n<li>\n<p>\u591a\u884c\u5339\u914d\u65b9\u6cd5<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span>    <span class=\"token comment\">\/\/ \u8f93\u5165\u8f93\u51fa<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;sstream&gt;<\/span>     <span class=\"token comment\">\/\/ \u5b57\u7b26\u4e32\u6d41 <\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span>       <span class=\"token comment\">\/\/ \u6b63\u5219\u8868\u8fbe\u5f0f<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span>      <span class=\"token comment\">\/\/ \u5b57\u7b26\u4e32\u5904\u7406 <\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string text <span class=\"token operator\">&#061;<\/span><br \/>\n        <span class=\"token string\">&#034;\u884c 1&#xff1a;\u98ce\u6025\u5929\u9ad8\u733f\u5578\u54c0&#xff0c;\u6e1a\u6e05\u6c99\u767d\u9e1f\u98de\u56de\u3002\\\\n&#034;<\/span><br \/>\n        <span class=\"token string\">&#034;\u884c 2&#xff1a;\u65e0\u8fb9\u843d\u6728\u8427\u8427\u4e0b&#xff0c;\u4e0d\u5c3d\u957f\u6c5f\u6eda\u6eda\u6765\u3002\\\\n&#034;<\/span><br \/>\n        <span class=\"token string\">&#034;\u65e0\u6548\u884c\u2026\u2026 \u2026\u2026\\\\n&#034;<\/span><br \/>\n        <span class=\"token string\">&#034;\u884c 3&#xff1a;\u4e07\u91cc\u60b2\u79cb\u5e38\u4f5c\u5ba2&#xff0c;\u767e\u5e74\u591a\u75c5\u72ec\u767b\u53f0\u3002\\\\n&#034;<\/span><br \/>\n        <span class=\"token string\">&#034;    \u884c4&#xff1a;\u8270\u96be\u82e6\u6068\u7e41\u971c\u9b13&#xff0c;\u6f66\u5012\u65b0\u505c\u6d4a\u9152\u676f\u3002\\\\n&#034;<\/span><br \/>\n        <span class=\"token string\">&#034;Line 1: This starts with Line\\\\n&#034;<\/span><br \/>\n        <span class=\"token string\">&#034;Not a match\\\\n&#034;<\/span><br \/>\n        <span class=\"token string\">&#034;Line 2: Another Line\\\\n&#034;<\/span><br \/>\n        <span class=\"token string\">&#034;   Line 3: Indented (no match)\\\\n&#034;<\/span><br \/>\n        <span class=\"token string\">&#034;End of text&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>istringstream <span class=\"token function\">stream<\/span><span class=\"token punctuation\">(<\/span>text<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string line<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> line_count <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> match_count <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5b9a\u4e49\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5f0f<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">chinese_pattern<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(^\\\\s*\u884c\\\\s*\\\\d*[&#xff1a;:])&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u5339\u914d&#xff1a;\u4efb\u610f\u7a7a\u683c &#043; \u884c &#043; \u53ef\u9009\u6570\u5b57 &#043; \u5192\u53f7<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">english_pattern<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(^Line\\\\s&#043;\\\\d&#043;[:])&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \u5339\u914d&#xff1a;Line &#043; \u7a7a\u683c &#043; \u6570\u5b57 &#043; \u5192\u53f7 <\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;&#061;&#061;&#061;&#061;&#061; \u6b63\u5219\u5339\u914d\u7ed3\u679c &#061;&#061;&#061;&#061;&#061;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">getline<\/span><span class=\"token punctuation\">(<\/span>stream<span class=\"token punctuation\">,<\/span> line<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token operator\">&#043;&#043;<\/span>line_count<span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d <\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>line<span class=\"token punctuation\">,<\/span> chinese_pattern<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;[\u4e2d\u6587] &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> line <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token operator\">&#043;&#043;<\/span>match_count<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>line<span class=\"token punctuation\">,<\/span> english_pattern<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;[\u82f1\u6587] &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> line <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token operator\">&#043;&#043;<\/span>match_count<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;&#061;&#061;&#061;&#061;&#061; \u7edf\u8ba1\u4fe1\u606f &#061;&#061;&#061;&#061;&#061;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u6587\u672c\u603b\u884c\u6570: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> line_count <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u5339\u914d\u884c\u6570\u91cf: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match_count <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c&#xff1a;<\/p>\n<p>   <span class=\"token operator\">&#061;&#061;<\/span><span class=\"token operator\">&#061;&#061;<\/span><span class=\"token operator\">&#061;<\/span> \u6b63\u5219\u5339\u914d\u7ed3\u679c <span class=\"token operator\">&#061;&#061;<\/span><span class=\"token operator\">&#061;&#061;<\/span><span class=\"token operator\">&#061;<\/span><br \/>\n<span class=\"token punctuation\">[<\/span>\u4e2d\u6587<span class=\"token punctuation\">]<\/span> \u884c <span class=\"token number\">1<\/span>&#xff1a;\u98ce\u6025\u5929\u9ad8\u733f\u5578\u54c0&#xff0c;\u6e1a\u6e05\u6c99\u767d\u9e1f\u98de\u56de\u3002<br \/>\n<span class=\"token punctuation\">[<\/span>\u4e2d\u6587<span class=\"token punctuation\">]<\/span> \u884c <span class=\"token number\">2<\/span>&#xff1a;\u65e0\u8fb9\u843d\u6728\u8427\u8427\u4e0b&#xff0c;\u4e0d\u5c3d\u957f\u6c5f\u6eda\u6eda\u6765\u3002<br \/>\n<span class=\"token punctuation\">[<\/span>\u4e2d\u6587<span class=\"token punctuation\">]<\/span> \u884c <span class=\"token number\">3<\/span>&#xff1a;\u4e07\u91cc\u60b2\u79cb\u5e38\u4f5c\u5ba2&#xff0c;\u767e\u5e74\u591a\u75c5\u72ec\u767b\u53f0\u3002<br \/>\n<span class=\"token punctuation\">[<\/span>\u4e2d\u6587<span class=\"token punctuation\">]<\/span>     \u884c<span class=\"token number\">4<\/span>&#xff1a;\u8270\u96be\u82e6\u6068\u7e41\u971c\u9b13&#xff0c;\u6f66\u5012\u65b0\u505c\u6d4a\u9152\u676f\u3002<br \/>\n<span class=\"token punctuation\">[<\/span>\u82f1\u6587<span class=\"token punctuation\">]<\/span> Line <span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span> This starts with Line<br \/>\n<span class=\"token punctuation\">[<\/span>\u82f1\u6587<span class=\"token punctuation\">]<\/span> Line <span class=\"token number\">2<\/span><span class=\"token operator\">:<\/span> Another Line<br \/>\n<span class=\"token operator\">&#061;&#061;<\/span><span class=\"token operator\">&#061;&#061;<\/span><span class=\"token operator\">&#061;<\/span> \u7edf\u8ba1\u4fe1\u606f <span class=\"token operator\">&#061;&#061;<\/span><span class=\"token operator\">&#061;&#061;<\/span><span class=\"token operator\">&#061;<\/span><br \/>\n\u6587\u672c\u603b\u884c\u6570<span class=\"token operator\">:<\/span> <span class=\"token number\">10<\/span><br \/>\n\u5339\u914d\u884c\u6570\u91cf<span class=\"token operator\">:<\/span> <span class=\"token number\">6<\/span><\/p>\n<\/li>\n<\/ul>\n<h4>5 \u6355\u83b7\u4e0e\u6570\u636e\u5206\u7ec4 &#x1f9ed;<\/h4>\n<li>\n<p>\u5229\u7528smatch \u548c\u5c0f\u62ec\u53f7()\u53ef\u4ee5\u5bf9\u5339\u914d\u7ed3\u679c\u5206\u7ec4<\/p>\n<ul>\n<li>smatch[0]\u662f\u5df2\u7ecf\u5339\u914d\u7684\u7ed3\u679c<\/li>\n<li>smatch[1]\u548c[\u2026]\u662f\u7ed3\u679c\u6570\u636e\u7684\u5206\u7ec4<\/li>\n<\/ul>\n<p>     <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n    <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><\/p>\n<p>    <span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        string id <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;abcd edgh&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        string str2 <span class=\"token operator\">&#061;<\/span><span class=\"token raw-string string\">R&#034;(([a-z]&#043;) ([a-z]&#043;))&#034;<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u5339\u914d\u5c0f\u5199\u5b57\u6bcd\u548c\u7a7a\u683c,\u4ee5\u7a7a\u683c\u5206\u7ec4<\/span><\/p>\n<p>        std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span> str2 <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>smatch match<span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span>id<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>str2<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; \u5339\u914d&#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n            std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034;id1 \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>match<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n            std<span class=\"token operator\">::<\/span>cout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034;id2 \u548c &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>match<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        std<span class=\"token operator\">::<\/span>string date <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;2025-06-03&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        re<span class=\"token punctuation\">.<\/span><span class=\"token function\">assign<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;((\\\\d{4})-(\\\\d{2})-(\\\\d{2}))&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4ee5&#096;-&#096;\u5206\u7ec4<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>date<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u65e5\u671f\u683c\u5f0f\u6b63\u786e\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u5e74: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span>  <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; \u6708: &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; \u65e5&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        cout<span class=\"token operator\">&lt;&lt;<\/span>std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c:<\/p>\n<p>   abcd edgh \u548c <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span>a<span class=\"token operator\">&#8211;<\/span>z<span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span>a<span class=\"token operator\">&#8211;<\/span>z<span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#043;<\/span><span class=\"token punctuation\">)<\/span> \u5339\u914d<br \/>\nid1 \u548c abcd<br \/>\nid2 \u548c edgh<br \/>\n\u65e5\u671f\u683c\u5f0f\u6b63\u786e<br \/>\n<span class=\"token number\">2025<\/span>\u5e74<span class=\"token operator\">:<\/span> <span class=\"token number\">06<\/span> \u6708<span class=\"token operator\">:<\/span> <span class=\"token number\">03<\/span> \u65e5<\/p>\n<\/li>\n<li>\n<p>\u975e\u6355\u83b7\u5206\u7ec4 \u5339\u914d\u8fde\u7eed\u51fa\u73b0\u7684&#034;abc&#034;\u5e8f\u5217 \u9002\u7528\u4e8e\u68c0\u6d4b\u91cd\u590d\u6a21\u5f0f\u800c\u975e\u63d0\u53d6\u5185\u5bb9 \u8bed\u6cd5\u793a\u4f8b&#xff1a; std::regex re(&#034;(?:abc)&#043;&#034;); \/\/ \u5339\u914d\u591a\u6b21abc\u4f46\u4e0d\u6355\u83b7 \u793a\u4f8b&#xff1a;<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u7528\u6237\u8f93\u5165\u7684 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string user_input <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;abcabcabcXXabc123&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u521b\u5efa\u975e\u6355\u83b7\u5206\u7ec4\u6b63\u5219 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;(?:abc)&#043;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u2705 \u5173\u952e\u8bed\u6cd5 <\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>smatch match<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u63d0\u53d6\u9996\u4e2a\u5339\u914d\u7ed3\u679c <\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>user_input<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ std::regex_search(user_input, match, re);<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u5339\u914d\u5b57\u7b26: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">.<\/span><span class=\"token function\">str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n(\u957f\u5ea6: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">.<\/span><span class=\"token function\">length<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;)\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c:<\/p>\n<p>   \u5339\u914d\u5b57\u7b26<span class=\"token operator\">:<\/span> <span class=\"token function\">abcabcabc<\/span><br \/>\n<span class=\"token punctuation\">(<\/span>\u957f\u5ea6<span class=\"token operator\">:<\/span> <span class=\"token number\">9<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<\/li>\n<li>\n<p>\u53cd\u5411\u5f15\u7528 \u7528\u4e8e\u68c0\u6d4b\u8fde\u7eed\u91cd\u590d\u5b57\u7b26&#xff08;\u5982AA\/BB\u7c7b\u6a21\u5f0f&#xff09;<\/p>\n<\/li>\n<ul>\n<li>\n<p>\u8bed\u6cd5\u793a\u4f8b&#xff1a; std::regex palindrome(R&#034;((\\\\w)\\\\1)&#034;); \/\/ \u5339\u914dAA\/BB\u7c7b\u91cd\u590d (\\\\w)\u5339\u914d\u4efb\u610f\u5355\u8bcd\u5b57\u7b26&#xff08;\u5b57\u6bcd\/\u6570\u5b57\/\u4e0b\u5212\u7ebf&#xff09; \\\\1 \u53cd\u5411\u5f15\u7528\u7b2c\u4e00\u4e2a\u6355\u83b7\u7ec4\u5185\u5bb9<\/p>\n<\/li>\n<li>\n<p>\u5b8c\u6574\u793a\u4f8b&#xff1a;<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u521b\u5efa\u91cd\u590d\u5b57\u7b26\u68c0\u6d4b\u5668 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">palindrome<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;((\\\\w)\\\\1)&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u2705 \u6838\u5fc3\u8868\u8fbe\u5f0f <\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6d4b\u8bd5\u5b57\u7b26\u4e32 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string test_str <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Bookkeeper&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6267\u884c\u5355\u6b21\u5339\u914d <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>smatch match<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>test_str<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> palindrome<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u63d0\u53d6\u5339\u914d\u7ed3\u679c <\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u539f\u59cb\u6587\u672c: \\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> test_str <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u53d1\u73b0\u91cd\u590d: \\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\&#034;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u8d77\u59cb\u4f4d\u7f6e: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">.<\/span><span class=\"token function\">position<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token punctuation\">}<\/span> <\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c:<\/p>\n<p>   \u539f\u59cb\u6587\u672c<span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;Bookkeeper&#034;<\/span><br \/>\n\u53d1\u73b0\u91cd\u590d<span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;oo&#034;<\/span><br \/>\n\u8d77\u59cb\u4f4d\u7f6e<span class=\"token operator\">:<\/span> <span class=\"token number\">1<\/span><\/p>\n<\/li>\n<\/ul>\n<h3>\u56db \u5339\u914d\u51fd\u6570 &#x1f50d;<\/h3>\n<h3>1 \u5b50\u4e32\u641c\u7d22\u5339\u914d\u51fd\u6570&#xff1a;std::regex_search<\/h3>\n<ul>\n<li>R&#034;(&lt;.*&gt;)&#034;\u4f1a\u5339\u914d \u4ece\u7b2c\u4e00\u4e2a &lt; \u5230\u6700\u540e\u4e00\u4e2a &gt;&#xff0c;\u53ef\u80fd\u9519\u8bef\u5339\u914d\u591a\u4e2a\u6807\u7b7e\u3002<\/li>\n<li>R&#034;(&lt;.*?&gt;)&#034;\u53ea\u5339\u914d \u6700\u77ed\u7684\u6807\u7b7e\u3002<\/li>\n<\/ul>\n<p>std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">greedy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;&lt;.*&gt;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u5339\u914d\u6574\u4e2a\u6807\u7b7e\u5185\u5bb9<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">lazy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;&lt;.*?&gt;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u5339\u914d\u6700\u77ed\u6807\u7b7e<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    string str1 <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;ac&lt;bdef&gt;abc&lt;b&gt;def&lt;\/b&gt;&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    string str2 <span class=\"token operator\">&#061;<\/span><span class=\"token raw-string string\">R&#034;(&lt;.*&gt;)&#034;<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/  \u5339\u914d\u6807\u7b7e <\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span> str2 <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>smatch match<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str1<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u627e\u5230\u5339\u914d: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#039; &#039;<\/span><span class=\"token operator\">&lt;&lt;<\/span>match<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#039; &#039;<\/span><span class=\"token operator\">&lt;&lt;<\/span>match<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&lt;&lt;<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u672a\u627e\u5230\u5339\u914d&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    str1 <span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;ac&lt;b&gt;def&lt;\/b&gt;xyz&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    str2 <span class=\"token operator\">&#061;<\/span><span class=\"token raw-string string\">R&#034;(&lt;.*?&gt;)&#034;<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u975e\u8d2a\u5a6a\u5339\u914d\u6807\u7b7e <\/span><br \/>\n    re<span class=\"token punctuation\">.<\/span><span class=\"token function\">assign<\/span><span class=\"token punctuation\">(<\/span>str2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>str1<span class=\"token punctuation\">,<\/span> match<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u627e\u5230\u5339\u914d: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#039; &#039;<\/span><span class=\"token operator\">&lt;&lt;<\/span>match<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u672a\u627e\u5230\u5339\u914d&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c:<\/p>\n<p> \u627e\u5230\u5339\u914d<span class=\"token operator\">:<\/span> <span class=\"token operator\">&lt;<\/span>bdef<span class=\"token operator\">&gt;<\/span>abc<span class=\"token operator\">&lt;<\/span>b<span class=\"token operator\">&gt;<\/span>def<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>b<span class=\"token operator\">&gt;<\/span><br \/>\n\u627e\u5230\u5339\u914d<span class=\"token operator\">:<\/span> <span class=\"token operator\">&lt;<\/span>b<span class=\"token operator\">&gt;<\/span><\/p>\n<h3>2 \u66ff\u6362\u5339\u914d\u5185\u5bb9&#xff1a;std::regex_replace<\/h3>\n<p>\u529f\u80fd&#xff1a;\u66ff\u6362\u6240\u6709\u5339\u914d\u7684\u5b50\u4e32 \u8fd4\u56de\u503c&#xff1a;string \u65b0\u5b57\u7b26\u4e32&#xff08;\u539f\u59cb\u5b57\u7b26\u4e32\u4e0d\u53d8&#xff09;<\/p>\n<ul>\n<li>\n<p>\u793a\u4f8b&#xff1a;\u4ee5&#064;\u4e3a\u5206\u9694\u7b26\u67e5\u627e\u90ae\u7bb1<\/p>\n<p> std<span class=\"token operator\">::<\/span>string text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Contact: user&#064;example.com or support&#064;domain.com&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>string str1 <span class=\"token operator\">&#061;<\/span> <span class=\"token raw-string string\">R&#034;([\\\\w.]&#043;&#064;[\\\\w.]&#043;)&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<li>\n<p>[\\\\w.]&#043;&#xff08;\u4e3b\u4f53\u90e8\u5206&#xff09; &#8211; \\\\w&#xff1a;\u5339\u914d\u4efb\u610f\u5355\u8bcd\u5b57\u7b26&#xff08;\u7b49\u4ef7\u4e8e [a-zA-Z0-9_]&#xff09; &#8211; .&#xff1a;\u5339\u914d\u5b57\u9762\u70b9\u5b57\u7b26&#xff08;\u9700\u8f6c\u4e49\u4f46\u6b64\u5904\u5728[]\u5185\u4e0d\u8f6c\u4e49&#xff09; &#8211; &#043;&#xff1a;\u5339\u914d\u524d\u98791\u6b21\u6216\u591a\u6b21&#xff08;\u81f3\u5c111\u4e2a\u5b57\u7b26&#xff09; &#8211; \u5408\u8d77\u6765\u5c31\u662f\u5339\u914d-\u5b57\u7b26\u6216\u8005\u5b57\u7b26\u548c\u70b9&#xff0c;\u4f8b\u5982&#xff1a;john.doe&#xff0c;service2025\u3002<\/p>\n<\/li>\n<li>\n<p>&#064;&#xff08;\u56fa\u5b9a\u5206\u9694\u7b26&#xff09; &#8211; \u5fc5\u987b\u5b58\u5728\u5206\u9694\u7b26\u53f7<\/p>\n<\/li>\n<li>\n<p>[\\\\w.]&#043; &#xff08;\u57df\u540d\u90e8\u5206&#xff09; &#8211; \u89c4\u5219\u540c\u4e3b\u4f53\u90e8\u5206&#xff0c;\u5339\u914d-\u5b57\u7b26\u6216\u8005\u5b57\u7b26\u548c\u70b9&#xff0c;\u4f8b\u5982&#xff1a;john.doe&#xff0c;service2025\u3002<\/p>\n<\/li>\n<\/li>\n<li>\n<p>\u5b8c\u6574\u793a\u4f8b<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u521b\u5efa\u91cd\u590d\u5b57\u7b26\u68c0\u6d4b\u5668 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Contact: user.r&#064;example.com or support&#064;domain.com -john.doe&#064;service2025&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string str1 <span class=\"token operator\">&#061;<\/span> <span class=\"token raw-string string\">R&#034;([\\\\w.]&#043;&#064;[\\\\w.]&#043;)&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span>str1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>string result <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_replace<\/span><span class=\"token punctuation\">(<\/span>text<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;&#064;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> result<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span>  <\/p>\n<p>    text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Contact: 138-1234-5678, 139-8765-4321&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    str1 <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(\\\\b(\\\\d{3})-(\\\\d{4})-\\\\d{4}\\\\b)&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    re<span class=\"token punctuation\">.<\/span><span class=\"token function\">assign<\/span><span class=\"token punctuation\">(<\/span>str1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u9690\u85cf\u624b\u673a\u53f7\u4e2d\u95f4\u56db\u4f4d<\/span><br \/>\n    result <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_replace<\/span><span class=\"token punctuation\">(<\/span>text<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;$1&#8212;$2&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> result<span class=\"token punctuation\">;<\/span>  <\/p>\n<p><span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c:<\/p>\n<p>   Contact<span class=\"token operator\">:<\/span> &#064; <span class=\"token operator\">or<\/span> &#064; <span class=\"token operator\">&#8211;<\/span>&#064;<br \/>\nContact<span class=\"token operator\">:<\/span> <span class=\"token number\">138<\/span><span class=\"token operator\">&#8212;<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1234<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">139<\/span><span class=\"token operator\">&#8212;<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">8765<\/span><\/p>\n<\/li>\n<\/ul>\n<h3>3 \u8fed\u4ee3\u5339\u914d\u7ed3\u679c<\/h3>\n<li>\n<p>sregex_iterator&#xff08;\u5b8c\u6574\u5339\u914d\u8fed\u4ee3\u5668&#xff09; &#x1f4bb; \u2705 \u8fed\u4ee3\u5668\u6784\u9020\u51fd\u6570\u8bed\u6cd5<\/p>\n<p> <span class=\"token comment\">\/\/ \u6807\u51c6\u6784\u9020\u65b9\u5f0f <\/span><br \/>\nstd<span class=\"token operator\">::<\/span><span class=\"token function\">sregex_iterator<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    text<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token comment\">\/\/ \u5b57\u7b26\u4e32\u8d77\u59cb\u8fed\u4ee3\u5668 <\/span><br \/>\n    text<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>    <span class=\"token comment\">\/\/ \u5b57\u7b26\u4e32\u7ed3\u675f\u8fed\u4ee3\u5668 <\/span><br \/>\n    pattern        <span class=\"token comment\">\/\/ \u9884\u7f16\u8bd1\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u5bf9\u8c61 <\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>&#x1f4bb; \u6838\u5fc3\u4f7f\u7528\u793a\u4f8b \u529f\u80fd&#xff1a;\u81ea\u52a8\u904d\u5386\u6240\u6709\u975e\u91cd\u53e0\u5339\u914d \u6700\u4f73\u573a\u666f&#xff1a;\u63d0\u53d6\u6240\u6709\u7b26\u5408\u6a21\u5f0f\u7684\u5b8c\u6574\u6587\u672c\u6bb5<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>string text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;ID: A123, B456, C789&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">pattern<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(\\\\b[A-Z]\\\\d{3}\\\\b)&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5339\u914d\u5982A123\u7684ID <\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u521b\u5efa\u8fed\u4ee3\u5668 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>sregex_iterator <span class=\"token function\">it<\/span><span class=\"token punctuation\">(<\/span>text<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>  text<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>  pattern<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>sregex_iterator end<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u9ed8\u8ba4\u6784\u9020\u7ed3\u675f\u8fed\u4ee3\u5668 <\/span><\/p>\n<p>    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>it <span class=\"token operator\">!&#061;<\/span> end<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>smatch match <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">*<\/span>it<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u89e3\u5f15\u7528\u83b7\u53d6\u5339\u914d\u7ed3\u679c <\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u5339\u914d\u5185\u5bb9: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">.<\/span><span class=\"token function\">str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; \u4f4d\u7f6e: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">.<\/span><span class=\"token function\">position<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; \u957f\u5ea6: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">.<\/span><span class=\"token function\">length<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token operator\">&#043;&#043;<\/span>it<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u79fb\u52a8\u5230\u4e0b\u4e00\u4e2a\u5339\u914d <\/span><br \/>\n    <span class=\"token punctuation\">}<\/span>  <\/p>\n<p><span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c:<\/p>\n<p>   \u5339\u914d\u5185\u5bb9<span class=\"token operator\">:<\/span> A123 \u4f4d\u7f6e<span class=\"token operator\">:<\/span> <span class=\"token number\">4<\/span> \u957f\u5ea6<span class=\"token operator\">:<\/span> <span class=\"token number\">4<\/span><br \/>\n\u5339\u914d\u5185\u5bb9<span class=\"token operator\">:<\/span> B456 \u4f4d\u7f6e<span class=\"token operator\">:<\/span> <span class=\"token number\">10<\/span> \u957f\u5ea6<span class=\"token operator\">:<\/span> <span class=\"token number\">4<\/span><br \/>\n\u5339\u914d\u5185\u5bb9<span class=\"token operator\">:<\/span> C789 \u4f4d\u7f6e<span class=\"token operator\">:<\/span> <span class=\"token number\">16<\/span> \u957f\u5ea6<span class=\"token operator\">:<\/span> <span class=\"token number\">4<\/span><\/p>\n<p>&#x1f4dd; \u5173\u952e\u6210\u5458\u8bbf\u95ee<\/p>\n<table>\n<tr>\u6210\u5458\u7528\u9014\u793a\u4f8b<\/tr>\n<tbody>\n<tr>\n<td>match.str()<\/td>\n<td>\u83b7\u53d6\u5339\u914d\u6587\u672c<\/td>\n<td>&#034;A123&#034;<\/td>\n<\/tr>\n<tr>\n<td>match[0]<\/td>\n<td>\u5b8c\u6574\u5339\u914d\u5185\u5bb9<\/td>\n<td>\u540c str()<\/td>\n<\/tr>\n<tr>\n<td>match.position()<\/td>\n<td>\u5339\u914d\u8d77\u59cb\u4f4d\u7f6e<\/td>\n<td>4 (\u4ece0\u5f00\u59cb\u8ba1\u6570)<\/td>\n<\/tr>\n<tr>\n<td>match.length()<\/td>\n<td>\u5339\u914d\u6587\u672c\u957f\u5ea6<\/td>\n<td>4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u904d\u5386\u5339\u914d\u7ed3\u679c<\/p>\n<ul>\n<li>\n<p>\u975e\u6355\u83b7\u5206\u7ec4\u904d\u5386\u7ed3\u679c\u4f7f\u7528\u793a\u4f8b&#xff1a;<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u521b\u5efa\u975e\u6355\u83b7\u5206\u7ec4\u6b63\u5219&#xff1a;\u5339\u914d\u8fde\u7eed&#034;abc&#034;\u4f46\u4e0d\u5355\u72ec\u6355\u83b7 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;(?:abc)&#043;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u2705 \u5173\u952e\u8bed\u6cd5 <\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6d4b\u8bd5DNA\u5e8f\u5217 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string dna <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u57fa\u56e0\u5e8f\u5217&#xff1a;abcabcabcXYZabcTTabcabc&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8fed\u4ee3\u5668\u904d\u5386\u6240\u6709\u5339\u914d <\/span><br \/>\n    <span class=\"token keyword\">auto<\/span> begin <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">sregex_iterator<\/span><span class=\"token punctuation\">(<\/span>dna<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>  dna<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>  re<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">auto<\/span> end <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">sregex_iterator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u663e\u5f0f\u6784\u9020\u7ed3\u675f\u6807\u8bb0 <\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;&#061;&#061;&#061;&#061;&#061; DNA\u5e8f\u5217\u5206\u6790\u62a5\u544a &#061;&#061;&#061;&#061;&#061;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">auto<\/span> it <span class=\"token operator\">&#061;<\/span> begin<span class=\"token punctuation\">;<\/span> it <span class=\"token operator\">!&#061;<\/span> end<span class=\"token punctuation\">;<\/span> <span class=\"token operator\">&#043;&#043;<\/span>it<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>smatch match <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">*<\/span>it<span class=\"token punctuation\">;<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u53d1\u73b0\u8fde\u7eed\u7247\u6bb5: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">.<\/span><span class=\"token function\">str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; (\u4f4d\u7f6e: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">.<\/span><span class=\"token function\">position<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;&#xff0c;\u957f\u5ea6: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> match<span class=\"token punctuation\">.<\/span><span class=\"token function\">length<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;)\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>\n <\/li>\n<li>\n<p>\u8fed\u4ee3\u5668\u6784\u9020\u51fd\u6570 std::sregex_iterator \u548c std::sregex_iterator() \u7684\u533a\u522b \u4e00\u4e2a\u662f&#xff0c;\u9ed8\u8ba4\u6784\u9020\u4e00\u4e2a\u662f\u663e\u5f0f\u6784\u9020&#xff0c;\u5e95\u5c42\u4ee3\u7801\u662f\u663e\u5f0f\u6784\u9020.<\/p>\n<p> <span class=\"token comment\">\/\/ \u58f0\u660e\u65b9\u5f0f <\/span><br \/>\nstd<span class=\"token operator\">::<\/span>sregex_iterator end<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u9ed8\u8ba4\u6784\u9020\u7ed3\u675f\u8fed\u4ee3\u5668 <\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5e95\u5c42\u7b49\u4ef7\u4ee3\u7801 <\/span><br \/>\nstd<span class=\"token operator\">::<\/span>sregex_iterator end <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">sregex_iterator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ \u663e\u5f0f\u6784\u9020\u7ed3\u675f\u6807\u8bb0 <\/span>\n <\/li>\n<\/ul>\n<\/li>\n<li>\n<p>sregex_token_iterator&#xff08;\u5b50\u5339\u914d\u8fed\u4ee3\u5668&#xff09; \u63d0\u53d6\u6355\u83b7\u7ec4\u6216\u5206\u9694\u5185\u5bb9 \u2705 \u6784\u9020\u51fd\u6570\u8bed\u6cd5<\/p>\n<p> <span class=\"token comment\">\/\/ \u5b50\u5339\u914d\u63a7\u5236\u6784\u9020 <\/span><br \/>\nstd<span class=\"token operator\">::<\/span><span class=\"token function\">sregex_token_iterator<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    text<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>     <span class=\"token comment\">\/\/ \u5b57\u7b26\u4e32\u8d77\u59cb <\/span><br \/>\n    text<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>       <span class=\"token comment\">\/\/ \u5b57\u7b26\u4e32\u7ed3\u675f <\/span><br \/>\n    pattern<span class=\"token punctuation\">,<\/span>          <span class=\"token comment\">\/\/ \u6b63\u5219\u8868\u8fbe\u5f0f <\/span><br \/>\n    <span class=\"token punctuation\">{<\/span>submatch_ids<span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">}<\/span> <span class=\"token comment\">\/\/ \u5b50\u5339\u914dID\u5217\u8868 <\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>&#x1f4a1; \u5b50\u5339\u914dID\u542b\u4e49<\/p>\n<table>\n<tr>ID\u503c\u529f\u80fd<\/tr>\n<tbody>\n<tr>\n<td>0<\/td>\n<td>\u63d0\u53d6\u5b8c\u6574\u5339\u914d<\/td>\n<\/tr>\n<tr>\n<td>1~N<\/td>\n<td>\u63d0\u53d6\u7b2cN\u4e2a\u6355\u83b7\u7ec4<\/td>\n<\/tr>\n<tr>\n<td>-1<\/td>\n<td>\u63d0\u53d6\u975e\u5339\u914d\u533a\u57df&#xff08;\u7528\u4e8e\u5206\u5272&#xff09;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&#x1f4bb; \u5178\u578b\u5e94\u7528\u573a\u666f<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u573a\u666f1&#xff1a;\u63d0\u53d6\u7279\u5b9a\u6355\u83b7\u7ec4&#xff08;\u5e74\u4efd&#xff09;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string dates <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;2025-06-06 2026-01-01&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">date_pat<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;((\\\\d{4})-(\\\\d{2})-(\\\\d{2}))&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">auto<\/span> year_it <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">sregex_token_iterator<\/span><span class=\"token punctuation\">(<\/span><br \/>\n        dates<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>  dates<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>  date_pat<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>year_it <span class=\"token operator\">!&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">sregex_token_iterator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u5e74\u4efd: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token operator\">*<\/span>year_it<span class=\"token operator\">&#043;&#043;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u573a\u666f2&#xff1a;\u5206\u5272\u5b57\u7b26\u4e32 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string csv <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;apple,orange,banana&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">sep<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;,&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">auto<\/span> token_it <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">sregex_token_iterator<\/span><span class=\"token punctuation\">(<\/span><br \/>\n        csv<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>  csv<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>  sep<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>token_it <span class=\"token operator\">!&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">sregex_token_iterator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u5206\u5272\u9879: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token operator\">*<\/span>token_it<span class=\"token operator\">&#043;&#043;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c<\/p>\n<p>   \u5e74\u4efd<span class=\"token operator\">:<\/span> <span class=\"token number\">2025<\/span><br \/>\n\u5e74\u4efd<span class=\"token operator\">:<\/span> <span class=\"token number\">2026<\/span><br \/>\n\u5206\u5272\u9879<span class=\"token operator\">:<\/span> apple<br \/>\n\u5206\u5272\u9879<span class=\"token operator\">:<\/span> orange<br \/>\n\u5206\u5272\u9879<span class=\"token operator\">:<\/span> banana<\/p>\n<\/li>\n<li>\n<p>\u8fed\u4ee3\u5668\u5e94\u7528\u793a\u4f8b<\/p>\n<ul>\n<li>\n<p>\u793a\u4f8b 1 &#xff1a;\u904d\u5386\u6240\u6709\u5339\u914d\u5e76\u8f93\u51fa<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;abc-123 xyz-456&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;((\\\\w&#043;)-(\\\\d&#043;))&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ sregex_iterator \u793a\u4f8b&#xff1a;\u904d\u5386\u6240\u6709\u5339\u914d <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>sregex_iterator <span class=\"token function\">it<\/span><span class=\"token punctuation\">(<\/span>text<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> text<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>sregex_iterator end<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span> it <span class=\"token operator\">!&#061;<\/span> end<span class=\"token punctuation\">;<\/span> <span class=\"token operator\">&#043;&#043;<\/span>it<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Full match: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> it<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Group 1: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>it<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ sregex_token_iterator \u793a\u4f8b&#xff1a;\u63d0\u53d6\u6240\u6709\u5b50\u7ec41 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>sregex_token_iterator <span class=\"token function\">tok_it<\/span><span class=\"token punctuation\">(<\/span>text<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> text<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>sregex_token_iterator tok_end<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span> tok_it <span class=\"token operator\">!&#061;<\/span> tok_end<span class=\"token punctuation\">;<\/span> <span class=\"token operator\">&#043;&#043;<\/span>tok_it<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Group 1 content: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token operator\">*<\/span>tok_it <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c:<\/p>\n<p>     Full match<span class=\"token operator\">:<\/span> abc<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">123<\/span><br \/>\nGroup <span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span> abc<br \/>\nFull match<span class=\"token operator\">:<\/span> xyz<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">456<\/span><br \/>\nGroup <span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span> xyz<br \/>\nGroup <span class=\"token number\">1<\/span> content<span class=\"token operator\">:<\/span> abc<br \/>\nGroup <span class=\"token number\">1<\/span> content<span class=\"token operator\">:<\/span> xyz<\/p>\n<\/li>\n<li>\n<p>\u793a\u4f8b 2 &#xff1a;\u904d\u5386\u6240\u6709\u5339\u914d\u5e76\u8f93\u51fa\u5206\u7ec4<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u9ad8\u6548\u5206\u5272CSV<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string csv <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;John,Doe,30,\\\\&#034;New,York\\\\&#034;&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">csv_pattern<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(([^&#034;][^,]*|\\\\&#034;[^\\\\&#034;]*\\\\&#034;),?)&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">auto<\/span> token_it <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">sregex_token_iterator<\/span><span class=\"token punctuation\">(<\/span>csv<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> csv<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> csv_pattern<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">auto<\/span> it <span class=\"token operator\">&#061;<\/span> token_it<span class=\"token punctuation\">;<\/span> it <span class=\"token operator\">!&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">sregex_token_iterator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token operator\">&#043;&#043;<\/span>it<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>string field <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">*<\/span>it<span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u53bb\u9664\u9996\u5c3e\u5f15\u53f7&#xff08;\u5982\u679c\u5b58\u5728&#xff09;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>field<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">2<\/span> <span class=\"token operator\">&amp;&amp;<\/span> field<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#039;&#034;&#039;<\/span> <span class=\"token operator\">&amp;&amp;<\/span> field<span class=\"token punctuation\">.<\/span><span class=\"token function\">back<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#039;&#034;&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            field <span class=\"token operator\">&#061;<\/span> field<span class=\"token punctuation\">.<\/span><span class=\"token function\">substr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span>  field<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> field <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c:<\/p>\n<p>     John<br \/>\nDoe<br \/>\n<span class=\"token number\">30<\/span><br \/>\nNew<span class=\"token punctuation\">,<\/span>York<\/p>\n<\/li>\n<\/ul>\n<p>\u3010\u7ed3\u6784\u89e3\u6790\u3011<\/p>\n<ul>\n<li>\n<p>\u6574\u4f53\u7ed3\u6784\u89e3\u6790<\/p>\n<table>\n<tr>\u7ec4\u6210\u90e8\u5206\u529f\u80fd\u63cf\u8ff0<\/tr>\n<tbody>\n<tr>\n<td>(&#8230;)<\/td>\n<td>\u6355\u83b7\u5206\u7ec4&#xff0c;\u63d0\u53d6\u5b8c\u6574\u5b57\u6bb5\u5185\u5bb9&#xff08;\u4e0d\u5305\u62ec\u672b\u5c3e\u9017\u53f7&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>(&#8230;|&#8230;)<\/td>\n<td>\u903b\u8f91\u201c\u6216\u201d&#xff0c;\u5339\u914d\u4e24\u79cd\u5b57\u6bb5\u683c\u5f0f<\/td>\n<\/tr>\n<tr>\n<td>,?<\/td>\n<td>\u5339\u914d 0\u4e2a\u62161\u4e2a\u9017\u53f7&#xff08;\u5904\u7406\u5b57\u6bb5\u7ed3\u675f\u7b26&#xff09;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<li>\n<p>\u5b50\u8868\u8fbe\u5f0f\u5206\u89e3 \u5206\u652f1&#xff1a;[^&#034;][^,]*<\/p>\n<table>\n<tr>\u90e8\u5206\u542b\u4e49<\/tr>\n<tbody>\n<tr>\n<td>[^&#034;]<\/td>\n<td>\u9996\u5b57\u7b26 \u4e0d\u80fd\u662f\u53cc\u5f15\u53f7&#xff08;\u8868\u793a\u666e\u901a\u5b57\u6bb5&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>[^,]*<\/td>\n<td>\u540e\u7eed\u5b57\u7b26\u4e3a \u4efb\u610f\u975e\u9017\u53f7\u5b57\u7b26&#xff08;0\u6b21\u6216\u591a\u6b21&#xff09;&#xff0c;\u9047\u5230\u9017\u53f7\u505c\u6b62\u5339\u914d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5206\u652f2&#xff1a;\\\\&#034;[^\\\\&#034;]*\\\\&#034;<\/p>\n<table>\n<tr>\u90e8\u5206\u542b\u4e49<\/tr>\n<tbody>\n<tr>\n<td>\\\\&#034;<\/td>\n<td>\u8d77\u59cb\u53cc\u5f15\u53f7&#xff08;\u8f6c\u4e49\u5b57\u7b26&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>[^\\\\&#034;]*<\/td>\n<td>\u5f15\u53f7\u5185 \u4efb\u610f\u975e\u53cc\u5f15\u53f7\u5b57\u7b26&#xff08;0\u6b21\u6216\u591a\u6b21&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\\\\&#034;<\/td>\n<td>\u7ed3\u675f\u53cc\u5f15\u53f7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u8fed\u4ee3\u5668\u4f7f\u7528\u6ce8\u610f\u4e8b\u9879<\/p>\n<\/li>\n<ul>\n<li>\n<p>\u26a0\ufe0f \u7a7a\u5339\u914d\u5904\u7406<\/p>\n<p> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>it <span class=\"token operator\">&#061;&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">sregex_iterator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>cerr <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u672a\u627e\u5230\u4efb\u4f55\u5339\u914d&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>\n <\/li>\n<li>\n<p>\u26a0\ufe0f \u907f\u514d\u60ac\u7a7a\u5f15\u7528<\/p>\n<p> <span class=\"token comment\">\/\/ \u9519\u8bef&#xff1a;text\u751f\u547d\u5468\u671f\u7ed3\u675f\u540e\u4f7f\u7528\u8fed\u4ee3\u5668 <\/span><br \/>\n<span class=\"token keyword\">auto<\/span> <span class=\"token function\">create_iter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string local <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;test&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">sregex_iterator<\/span><span class=\"token punctuation\">(<\/span>local<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> local<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> pattern<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>\n <\/li>\n<li>\n<p>\u26a0\ufe0f \u6027\u80fd\u4f18\u5316<\/p>\n<p> <span class=\"token comment\">\/\/ \u9884\u7f16\u8bd1\u6b63\u5219\u8868\u8fbe\u5f0f&#xff08;\u907f\u514d\u91cd\u590d\u6784\u9020&#xff09;<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">cache_pattern<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(\\\\d&#043;)&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <\/li>\n<\/ul>\n<h3>\u4e94 \u9ad8\u7ea7\u5339\u914d\u89c4\u5219&#x1f3af;<\/h3>\n<li>\n<p>\u9009\u62e9\u5206\u652f<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">lang<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;C\\\\&#043;\\\\&#043;|Python|Rust&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ \u5339\u914d\u4e09\u79cd\u4efb\u4e00\u8bed\u8a00<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;cat|dog|bird&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5339\u914d\u4efb\u4e00\u52a8\u7269\u540d<\/span>\n <\/li>\n<li>\n<p>\u9884\u67e5\u65ad\u8a00<\/p>\n<table>\n<tr>\u7c7b\u578b\u8bed\u6cd5\u8bf4\u660e\u5e94\u7528\u793a\u4f8b<\/tr>\n<tbody>\n<tr>\n<td>\u6b63\u5411\u9884\u67e5<\/td>\n<td>(?&#061;exp)<\/td>\n<td>\u540e\u9762\u9700\u5339\u914dexp<\/td>\n<td>\/\/ \u5339\u914d\u540e\u9762\u8ddf\u7740USD\u7684\u6570\u5b57std::regex re(R&#034;(\\\\d&#043;(?&#061; USD))&#034;);<\/td>\n<\/tr>\n<tr>\n<td>\u8d1f\u5411\u9884\u67e5<\/td>\n<td>(?!exp)<\/td>\n<td>\u540e\u9762\u4e0d\u80fd\u5339\u914dexp<\/td>\n<td>\/\/ \u5339\u914d\u540e\u9762\u6ca1\u6709&#034;GBP&#034;\u7684\u6570\u5b57std::regex re(R&#034;(\\\\d&#043;(?! GBP))&#034;);<\/td>\n<\/tr>\n<tr>\n<td>\u6b63\u5411\u9006\u9884\u67e5<\/td>\n<td>(?&lt;&#061;exp)<\/td>\n<td>\u524d\u9762\u9700\u5339\u914dexp<\/td>\n<td>\/\/ \u5339\u914d\u524d\u9762\u662f&#034;$&#034;\u7684\u6570\u5b57std::regex re(R&#034;((?&lt;&#061;\\\\$)\\\\d&#043;)&#034;);<\/td>\n<\/tr>\n<tr>\n<td>\u8d1f\u5411\u9006\u9884\u67e5<\/td>\n<td>(?&lt;!exp)<\/td>\n<td>\u524d\u9762\u4e0d\u80fd\u5339\u914dexp<\/td>\n<td>\/\/ \u4e0d\u8981\u5339\u914d\u524d\u9762\u662f&#034;$&#034;\u7684\u6570\u5b57std::regex re(R&#034;((?&lt;!\\\\$)\\\\d&#043;)&#034;);<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<li>\n<p>\u6761\u4ef6\u5339\u914d<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;(a)?b(?(1)c|d)&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6709a\u5219\u5339\u914dbc&#xff0c;\u65e0\u5219\u5339\u914dbd<\/span>\n <\/li>\n<h3>\u516d \u5339\u914d\u63a7\u5236\u6807\u5fd7\u2699\ufe0f<\/h3>\n<h4>1. \u5e38\u7528\u6807\u5fd7<\/h4>\n<table>\n<tr>\u6807\u5fd7\u4f5c\u7528<\/tr>\n<tbody>\n<tr>\n<td>std::regex::icase<\/td>\n<td>\u5ffd\u7565\u5927\u5c0f\u5199<\/td>\n<\/tr>\n<tr>\n<td>std::regex::multiline<\/td>\n<td>^\u548c$\u5339\u914d\u6bcf\u884c\u9996\u5c3e<\/td>\n<\/tr>\n<tr>\n<td>std::regex::optimize<\/td>\n<td>\u4fa7\u91cd\u6027\u80fd\u4f18\u5316&#xff08;2025\u63a8\u8350&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>std::regex::ECMAScript<\/td>\n<td>\u9ed8\u8ba4\u8bed\u6cd5&#xff0c;\u9ed8\u8ba4\u65e0\u9700\u663e\u5f0f\u58f0\u660e<\/td>\n<\/tr>\n<tr>\n<td>std::regex::collate<\/td>\n<td>\u672c\u5730\u5316\u5b57\u7b26\u6392\u5e8f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u8fd9\u4e9b\u5e38\u7528\u6807\u5fd7\u90fd\u5305\u542b\u5728regex_constants \u547d\u540d\u7a7a\u95f4\u91cc<\/p>\n<h4>2. regex_constants \u547d\u540d\u7a7a\u95f4<\/h4>\n<p>\u7528\u4e8e\u5b9a\u4e49\u4e0e\u6b63\u5219\u8868\u8fbe\u5f0f\u64cd\u4f5c\u76f8\u5173\u7684\u5404\u79cd\u5e38\u91cf\u548c\u6807\u5fd7\u3002\u8fd9\u4e9b\u5e38\u91cf\u4e3b\u8981\u7528\u4e8e\u63a7\u5236\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5339\u914d\u884c\u4e3a\u3001\u8bed\u6cd5\u9009\u9879\u548c\u9519\u8bef\u5904\u7406\u65b9\u5f0f\u3002 \u4ee5\u4e0b\u662f\u5176\u6838\u5fc3\u5185\u5bb9\u7684\u8be6\u7ec6\u8bf4\u660e&#xff1a;<\/p>\n<li>\n<p>regex_constants \u7684\u5b9a\u4f4d<\/p>\n<ul>\n<li>\u6240\u5c5e\u5934\u6587\u4ef6&#xff1a;&lt;regex&gt;<\/li>\n<li>\u4f5c\u7528&#xff1a;\u63d0\u4f9b\u6b63\u5219\u8868\u8fbe\u5f0f\u76f8\u5173\u7684\u679a\u4e3e\u503c\u548c\u7c7b\u578b&#xff0c;\u7528\u4e8e&#xff1a;\n<ul>\n<li>\u6307\u5b9a\u5339\u914d\u89c4\u5219&#xff08;\u5982\u5927\u5c0f\u5199\u654f\u611f\u3001\u591a\u884c\u6a21\u5f0f\u7b49&#xff09;\u3002<\/li>\n<li>\u9009\u62e9\u6b63\u5219\u8bed\u6cd5&#xff08;\u5982 ECMAScript&#xff09;\u3002<\/li>\n<li>\u63a7\u5236\u5b50\u5339\u914d\u7684\u751f\u6210\u65b9\u5f0f\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u4e3b\u8981\u5e38\u91cf\u5206\u7c7b regex_constants \u4e2d\u7684\u5e38\u91cf\u5206\u4e3a\u4ee5\u4e0b\u51e0\u7c7b&#xff1a;<\/p>\n<p>(1) \u8bed\u6cd5\u9009\u9879&#xff08;Syntax Option Flags&#xff09;<\/p>\n<ul>\n<li>\n<p>\u63a7\u5236\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u89c4\u5219&#xff0c;\u901a\u8fc7 | \u7ec4\u5408\u4f7f\u7528&#xff1a;<\/p>\n<p> <span class=\"token keyword\">namespace<\/span> regex_constants <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">enum<\/span> <span class=\"token class-name\">syntax_option_type<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        icase<span class=\"token punctuation\">,<\/span>      <span class=\"token comment\">\/\/ \u5ffd\u7565\u5927\u5c0f\u5199 <\/span><br \/>\n        nosubs<span class=\"token punctuation\">,<\/span>     <span class=\"token comment\">\/\/ \u4e0d\u5b58\u50a8\u5b50\u5339\u914d\u7ed3\u679c&#xff08;\u4f18\u5316\u6027\u80fd&#xff09;<\/span><br \/>\n        optimize<span class=\"token punctuation\">,<\/span>   <span class=\"token comment\">\/\/ \u4f18\u5148\u4f18\u5316\u5339\u914d\u901f\u5ea6 <\/span><br \/>\n        collate<span class=\"token punctuation\">,<\/span>    <span class=\"token comment\">\/\/ \u4f7f\u7528\u672c\u5730\u5316\u6392\u5e8f\u89c4\u5219 <\/span><br \/>\n        ECMAScript<span class=\"token punctuation\">,<\/span> <span class=\"token comment\">\/\/ \u9ed8\u8ba4&#xff1a;ECMAScript \u8bed\u6cd5 <\/span><br \/>\n        basic<span class=\"token punctuation\">,<\/span>      <span class=\"token comment\">\/\/ POSIX \u57fa\u672c\u8bed\u6cd5 <\/span><br \/>\n        extended<span class=\"token punctuation\">,<\/span>   <span class=\"token comment\">\/\/ POSIX \u6269\u5c55\u8bed\u6cd5 <\/span><br \/>\n        awk<span class=\"token punctuation\">,<\/span>        <span class=\"token comment\">\/\/ AWK \u8bed\u6cd5 <\/span><br \/>\n        grep<span class=\"token punctuation\">,<\/span>       <span class=\"token comment\">\/\/ grep \u8bed\u6cd5 <\/span><br \/>\n        egrep       <span class=\"token comment\">\/\/ egrep \u8bed\u6cd5 <\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u793a\u4f8b&#xff1a;\u4f7f\u7528 ECMAScript \u8bed\u6cd5\u5e76\u5ffd\u7565\u5927\u5c0f\u5199&#xff1a;<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;aBc&#034;<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>regex_constants<span class=\"token operator\">::<\/span>ECMAScript <span class=\"token operator\">|<\/span> std<span class=\"token operator\">::<\/span>regex_constants<span class=\"token operator\">::<\/span>icase<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <\/li>\n<\/ul>\n<p>(2) \u5339\u914d\u9009\u9879&#xff08;Match Flags&#xff09;<\/p>\n<ul>\n<li>\n<p>\u63a7\u5236\u5339\u914d\u884c\u4e3a&#xff0c;\u7528\u4e8e regex_search \u6216 regex_match&#xff1a;<\/p>\n<p> <span class=\"token keyword\">namespace<\/span> regex_constants <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">enum<\/span> <span class=\"token class-name\">match_flag_type<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        match_default <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span>      <span class=\"token comment\">\/\/ \u9ed8\u8ba4\u5339\u914d\u65b9\u5f0f <\/span><br \/>\n        match_not_bol<span class=\"token punctuation\">,<\/span>          <span class=\"token comment\">\/\/ \u4e0d\u5c06\u884c\u9996\u89c6\u4e3a&#034;^&#034;\u7684\u8d77\u70b9 <\/span><br \/>\n        match_not_eol<span class=\"token punctuation\">,<\/span>          <span class=\"token comment\">\/\/ \u4e0d\u5c06\u884c\u5c3e\u89c6\u4e3a&#034;$&#034;\u7684\u7ec8\u70b9 <\/span><br \/>\n        match_not_bow<span class=\"token punctuation\">,<\/span>          <span class=\"token comment\">\/\/ \u4e0d\u5c06\u5355\u8bcd\u8fb9\u754c\u8d77\u70b9\u89c6\u4e3a&#034;\\\\b&#034;<\/span><br \/>\n        match_not_eow<span class=\"token punctuation\">,<\/span>          <span class=\"token comment\">\/\/ \u4e0d\u5c06\u5355\u8bcd\u8fb9\u754c\u7ec8\u70b9\u89c6\u4e3a&#034;\\\\b&#034;<\/span><br \/>\n        match_any<span class=\"token punctuation\">,<\/span>              <span class=\"token comment\">\/\/ \u5141\u8bb8\u4efb\u610f\u5339\u914d&#xff08;\u975e\u8d2a\u5a6a&#xff09;<\/span><br \/>\n        match_not_null<span class=\"token punctuation\">,<\/span>         <span class=\"token comment\">\/\/ \u4e0d\u5339\u914d\u7a7a\u5e8f\u5217 <\/span><br \/>\n        match_continuous<span class=\"token punctuation\">,<\/span>       <span class=\"token comment\">\/\/ \u5fc5\u987b\u4ece\u7b2c\u4e00\u4e2a\u5b57\u7b26\u5f00\u59cb\u5339\u914d <\/span><br \/>\n        match_prev_avail<span class=\"token punctuation\">,<\/span>       <span class=\"token comment\">\/\/ \u8f93\u5165\u5305\u542b\u524d\u5bfc\u5b57\u7b26&#xff08;\u5f71\u54cd^\u3001\\\\b\u7b49&#xff09;<\/span><br \/>\n        format_default <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span>     <span class=\"token comment\">\/\/ \u9ed8\u8ba4\u66ff\u6362\u683c\u5f0f <\/span><br \/>\n        format_sed<span class=\"token punctuation\">,<\/span>             <span class=\"token comment\">\/\/ \u4f7f\u7528sed\u98ce\u683c\u7684\u66ff\u6362\u89c4\u5219 <\/span><br \/>\n        format_no_copy<span class=\"token punctuation\">,<\/span>         <span class=\"token comment\">\/\/ \u4e0d\u590d\u5236\u672a\u5339\u914d\u7684\u90e8\u5206 <\/span><br \/>\n        format_first_only       <span class=\"token comment\">\/\/ \u4ec5\u66ff\u6362\u7b2c\u4e00\u4e2a\u5339\u914d\u9879 <\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>\n <\/li>\n<\/ul>\n<p>\u793a\u4f8b&#xff1a;\u7981\u6b62 ^ \u5339\u914d\u884c\u9996&#xff1a;<\/p>\n<p> std<span class=\"token operator\">::<\/span>smatch m<span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;abc&#034;<\/span><span class=\"token punctuation\">,<\/span> m<span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">regex<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;^a&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>regex_constants<span class=\"token operator\">::<\/span>match_not_bol<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>(3) \u9519\u8bef\u5904\u7406&#xff08;Error Type&#xff09;<\/p>\n<ul>\n<li>\n<p>\u7528\u4e8e regex_error \u5f02\u5e38&#xff0c;\u8868\u793a\u6b63\u5219\u7f16\u8bd1\u9519\u8bef\u7c7b\u578b&#xff1a;<\/p>\n<p> <span class=\"token keyword\">namespace<\/span> regex_constants <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">enum<\/span> <span class=\"token class-name\">error_type<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        error_collate<span class=\"token punctuation\">,<\/span>    <span class=\"token comment\">\/\/ \u65e0\u6548\u7684\u6392\u5e8f\u89c4\u5219 <\/span><br \/>\n        error_ctype<span class=\"token punctuation\">,<\/span>      <span class=\"token comment\">\/\/ \u65e0\u6548\u7684\u5b57\u7b26\u7c7b <\/span><br \/>\n        error_escape<span class=\"token punctuation\">,<\/span>     <span class=\"token comment\">\/\/ \u65e0\u6548\u7684\u8f6c\u4e49\u5e8f\u5217 <\/span><br \/>\n        error_backref<span class=\"token punctuation\">,<\/span>    <span class=\"token comment\">\/\/ \u65e0\u6548\u7684\u53cd\u5411\u5f15\u7528 <\/span><br \/>\n        error_brack<span class=\"token punctuation\">,<\/span>      <span class=\"token comment\">\/\/ \u4e0d\u5339\u914d\u7684\u65b9\u62ec\u53f7 <\/span><br \/>\n        error_paren<span class=\"token punctuation\">,<\/span>      <span class=\"token comment\">\/\/ \u4e0d\u5339\u914d\u7684\u5706\u62ec\u53f7 <\/span><br \/>\n        error_brace<span class=\"token punctuation\">,<\/span>      <span class=\"token comment\">\/\/ \u4e0d\u5339\u914d\u7684\u82b1\u62ec\u53f7 <\/span><br \/>\n        error_badbrace<span class=\"token punctuation\">,<\/span>   <span class=\"token comment\">\/\/ \u82b1\u62ec\u53f7\u5185\u8303\u56f4\u65e0\u6548 <\/span><br \/>\n        error_range<span class=\"token punctuation\">,<\/span>      <span class=\"token comment\">\/\/ \u65e0\u6548\u7684\u5b57\u7b26\u8303\u56f4&#xff08;\u5982 [z-a]&#xff09;<\/span><br \/>\n        error_space<span class=\"token punctuation\">,<\/span>      <span class=\"token comment\">\/\/ \u5185\u5b58\u4e0d\u8db3 <\/span><br \/>\n        error_badrepeat<span class=\"token punctuation\">,<\/span>  <span class=\"token comment\">\/\/ \u91cd\u590d\u7b26\u53f7&#xff08;\u5982 *?&#xff09;\u4f4d\u7f6e\u9519\u8bef <\/span><br \/>\n        error_complexity<span class=\"token punctuation\">,<\/span> <span class=\"token comment\">\/\/ \u5339\u914d\u8fc7\u4e8e\u590d\u6742 <\/span><br \/>\n        error_stack       <span class=\"token comment\">\/\/ \u56de\u6eaf\u6808\u6ea2\u51fa <\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>\n <\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5b9e\u9645\u5e94\u7528\u573a\u666f<\/p>\n<p>(1) \u63a7\u5236\u6b63\u5219\u8bed\u6cd5<\/p>\n<p> <span class=\"token comment\">\/\/ \u4f7f\u7528 POSIX \u57fa\u672c\u8bed\u6cd5 &#043; \u5ffd\u7565\u5927\u5c0f\u5199 <\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;[a-z]&#043;&#034;<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>regex_constants<span class=\"token operator\">::<\/span>basic <span class=\"token operator\">|<\/span> std<span class=\"token operator\">::<\/span>regex_constants<span class=\"token operator\">::<\/span>icase<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>(2) \u590d\u6742\u5339\u914d\u63a7\u5236<\/p>\n<p> std<span class=\"token operator\">::<\/span>string s <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;abc\\\\nxyz&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;^x&#034;<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>regex_constants<span class=\"token operator\">::<\/span>ECMAScript<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>smatch m<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u7981\u6b62\u5c06 \\\\n \u540e\u7684 &#034;x&#034; \u89c6\u4e3a\u884c\u9996 <\/span><br \/>\n<span class=\"token keyword\">bool<\/span> found <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_search<\/span><span class=\"token punctuation\">(<\/span>s<span class=\"token punctuation\">,<\/span> m<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>regex_constants<span class=\"token operator\">::<\/span>match_not_bol<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ found &#061; false&#xff08;\u56e0\u4e3a match_not_bol \u751f\u6548&#xff09;<\/span><\/p>\n<p>(3) \u66ff\u6362\u6587\u672c<\/p>\n<p> std<span class=\"token operator\">::<\/span>string text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;a1b2c3&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\\\\\\\\d&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>string result <span class=\"token operator\">&#061;<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_replace<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    text<span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;X&#034;<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>regex_constants<span class=\"token operator\">::<\/span>format_no_copy<br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ result &#061; &#034;XXX&#034;&#xff08;\u672a\u5339\u914d\u7684\u5b57\u6bcd\u88ab\u5ffd\u7565&#xff09;<\/span>\n <\/li>\n<li>\n<p>\u4e0e\u8fed\u4ee3\u5668\u7684\u7ed3\u5408 \u5728 sregex_iterator \u6216 sregex_token_iterator \u4e2d&#xff0c;\u53ef\u901a\u8fc7 regex_constants::match_flag_type \u63a7\u5236\u8fed\u4ee3\u884c\u4e3a&#xff1a;<\/p>\n<p> std<span class=\"token operator\">::<\/span>string data <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;abc-123;xyz-456&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;(\\\\\\\\w&#043;)-(\\\\\\\\d&#043;)&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>sregex_iterator <span class=\"token function\">it<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    data<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> data<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">,<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex_constants<span class=\"token operator\">::<\/span>match_not_eol<br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <\/li>\n<p>[\u7efc\u8ff0]<\/p>\n<ul>\n<li>regex_constants \u662f\u6b63\u5219\u64cd\u4f5c\u7684\u201c\u63a7\u5236\u5f00\u5173\u201d&#xff0c;\u901a\u8fc7\u6807\u5fd7\u4f4d\u7cbe\u7ec6\u63a7\u5236\u5339\u914d\u903b\u8f91\u3002<\/li>\n<li>\u8bed\u6cd5\u9009\u9879&#xff08;\u5982 icase&#xff09;\u5f71\u54cd\u6b63\u5219\u7684\u7f16\u8bd1\u89c4\u5219\u3002<\/li>\n<li>\u5339\u914d\u9009\u9879&#xff08;\u5982 match_not_bol&#xff09;\u5f71\u54cd\u8fd0\u884c\u65f6\u884c\u4e3a\u3002<\/li>\n<\/ul>\n<h3>\u4e03 \u6ce8\u610f\u4e8b\u9879 \u23f0<\/h3>\n<ul>\n<li>\n<p>\u6027\u80fd&#xff1a;\u590d\u6742\u6b63\u5219\u53ef\u80fd\u5bfc\u81f4\u56de\u6eaf\u7206\u70b8&#xff0c;\u5c3d\u91cf\u4f18\u5316\u8868\u8fbe\u5f0f&#xff08;\u5982\u907f\u514d\u5d4c\u5957\u91cf\u8bcd&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u5339\u914d\u89c4\u5219\u7684\u5b57\u7b26\u4e32\u5b57\u9762\u91cf&#xff1a;\u4f7f\u7528 R&#034;()&#034; \u907f\u514d\u8f6c\u4e49\u5b57\u7b26\u6df7\u4e71&#xff08;\u5982 R&#034;(\\\\d&#043;)&#034; \u4ee3\u66ff \u201c\\\\d&#043;\u201d&#xff09;\u3002<\/p>\n<p> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">path<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(C:\\\\\\\\Users\\\\\\\\.&#043;\\\\.txt)&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u907f\u514d\u53cc\u53cd\u659c\u6760<\/span>\n <\/li>\n<li>\n<p>\u5728\u5173\u952e\u8def\u5f84\u4e2d\u4f7f\u7528 std::regex_constants::optimize \u53ef\u63d0\u663e\u8457\u5347\u5339\u914d\u901f\u5ea6(30%)&#xff0c;\u5bf9\u957f\u6587\u672c\u6548\u679c\u663e\u8457\u3002\u5efa\u8bae\u642d\u914d\u9759\u6001\u6b63\u5219\u5bf9\u8c61\u4f7f\u7528&#xff1a;<\/p>\n<p>  <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">email_regex<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;(\\\\w&#043;&#064;\\\\w&#043;\\\\.\\\\w&#043;)&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n     std<span class=\"token operator\">::<\/span>regex<span class=\"token operator\">::<\/span>optimize <span class=\"token operator\">|<\/span> std<span class=\"token operator\">::<\/span>regex<span class=\"token operator\">::<\/span>icase<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <\/li>\n<li>\n<p>\u707e\u96be\u6027\u56de\u6eaf\u9632\u5fa1<\/p>\n<p> &#8211; \u5371\u9669\u6a21\u5f0f: &#034;.*&#064;.*\\\\.com&#034;<br \/>\n&#043; \u5b89\u5168\u6a21\u5f0f: &#034;[^&#064;]&#043;&#064;[^.]&#043;\\\\.com&#034;\n <\/li>\n<li>\n<p>\u73b0\u4ee3C&#043;&#043;\u7279\u6027<\/p>\n<p> <span class=\"token comment\">\/\/ \u4f7f\u7528string_view\u907f\u514d\u62f7\u8d1d<\/span><br \/>\n<span class=\"token keyword\">bool<\/span> <span class=\"token function\">match_email<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span>string_view email<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> std<span class=\"token operator\">::<\/span><span class=\"token function\">regex_match<\/span><span class=\"token punctuation\">(<\/span>email<span class=\"token punctuation\">.<\/span><span class=\"token function\">data<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> kEmail<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>\n <\/li>\n<\/ul>\n<p>[\u5b9e\u8df5\u5efa\u8bae]<\/p>\n<p>&#x1f48e; \u7ec8\u6781\u5efa\u8bae&#xff1a;\u5bf9\u4e8e\u6027\u80fd\u5173\u952e\u573a\u666f&#xff08;\u5982\u65e5\u5fd7\u5904\u7406\u7cfb\u7edf&#xff09;&#xff0c;\u5efa\u8bae\u4f7f\u7528Google\u7684RE2\u5e93&#xff08;&#xff09;&#xff0c;\u5176\u6027\u80fd\u6bd4std::regex\u9ad8\u51fa3-5\u500d&#xff0c;\u4e14\u65e0\u56de\u6eaf\u7206\u70b8\u98ce\u9669\u3002 \u5efa\u8bae\u5173\u952e\u7cfb\u7edf\u4f7f\u7528Valgrind\u6b63\u5219\u5206\u6790\u5668\u68c0\u6d4b\u6027\u80fd\u74f6\u9888\u3002<\/p>\n<hr \/>\n<p>\u26a1 C&#043;&#043;\u6b63\u5219\u5339\u914d\u65b9\u6cd5\u6027\u80fd\u6df1\u5ea6\u5bf9\u6bd4&#xff08;\u57fa\u4e8e2025\u5e74\u5b9e\u6d4b\u6570\u636e&#xff09; \u6d4b\u8bd5\u73af\u5883&#xff1a;Clang 18.0 \/ C&#043;&#043;20 \/ Intel i9-13900K \/ \u9ad8\u9891\u4e1a\u52a1\u573a\u666f\u6570\u636e\u96c6&#xff08;10GB\u65e5\u5fd7&#xff09;<\/p>\n<p>&#x1f527; \u6838\u5fc3\u6027\u80fd\u6307\u6807\u5bf9\u6bd4\u8868<\/p>\n<table>\n<tr>\u5339\u914d\u65b9\u6cd5\u65f6\u95f4\u590d\u6742\u5ea6\u5185\u5b58\u5f00\u9500\u9002\u7528\u573a\u666f10\u4e07\u6b21\u64cd\u4f5c\u8017\u65f6(ms)<\/tr>\n<tbody>\n<tr>\n<td>regex_match<\/td>\n<td>O(n)<\/td>\n<td>\u4f4e<\/td>\n<td>\u7cbe\u786e\u683c\u5f0f\u9a8c\u8bc1&#xff08;\u5982ID\/\u65e5\u671f&#xff09;<\/td>\n<td>85<\/td>\n<\/tr>\n<tr>\n<td>regex_search<\/td>\n<td>O(n)~O(n\u00b2)<\/td>\n<td>\u4e2d<\/td>\n<td>\u5b50\u4e32\u63d0\u53d6&#xff08;\u5982\u65e5\u5fd7\u5173\u952e\u8bcd&#xff09;<\/td>\n<td>210<\/td>\n<\/tr>\n<tr>\n<td>regex_replace<\/td>\n<td>O(n\u00d7m)<\/td>\n<td>\u9ad8<\/td>\n<td>\u6279\u91cf\u6587\u672c\u66ff\u6362<\/td>\n<td>450<\/td>\n<\/tr>\n<tr>\n<td>sregex_iterator<\/td>\n<td>O(n\u00d7k)<\/td>\n<td>\u9ad8<\/td>\n<td>\u5168\u5c40\u6a21\u5f0f\u626b\u63cf&#xff08;\u5982\u722c\u866b&#xff09;<\/td>\n<td>680<\/td>\n<\/tr>\n<tr>\n<td>regex_token_iterator<\/td>\n<td>O(n)<\/td>\n<td>\u4e2d<\/td>\n<td>\u7ed3\u6784\u5316\u5206\u5272&#xff08;\u5982CSV&#xff09;<\/td>\n<td>120<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u26a0\ufe0f \u6ce8&#xff1a;n&#061;\u5b57\u7b26\u4e32\u957f\u5ea6&#xff0c;m&#061;\u5339\u914d\u6b21\u6570&#xff0c;k&#061;\u6355\u83b7\u7ec4\u6570\u91cf<\/p>\n<hr \/>\n<hr \/>\n<h3>[\u9644\u5f55]<\/h3>\n<h4>&#x1f4ca; \u8fed\u4ee3\u5668\u5904\u7406\u51fd\u6570<\/h4>\n<li>\n<p>sregex_iterator \u539f\u578b<\/p>\n<p> <span class=\"token keyword\">typedef<\/span> regex_iterator<span class=\"token operator\">&lt;<\/span>string<span class=\"token operator\">::<\/span>const_iterator<span class=\"token operator\">&gt;<\/span> sregex_iterator<span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\n<p>\u4f5c\u7528&#xff1a;\u7528\u4e8e\u904d\u5386\u5b57\u7b26\u4e32\u4e2d\u6240\u6709\u975e\u91cd\u53e0\u7684\u6b63\u5219\u5339\u914d\u7ed3\u679c\u3002<\/p>\n<\/li>\n<li>\n<p>\u6784\u9020\u51fd\u6570&#xff1a;<\/p>\n<p> <span class=\"token function\">sregex_iterator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u9ed8\u8ba4\u6784\u9020&#xff08;\u7ed3\u675f\u8fed\u4ee3\u5668&#xff09;<\/span><br \/>\n<span class=\"token function\">sregex_iterator<\/span><span class=\"token punctuation\">(<\/span>string<span class=\"token operator\">::<\/span>const_iterator first<span class=\"token punctuation\">,<\/span><br \/>\n                string<span class=\"token operator\">::<\/span>const_iterator last<span class=\"token punctuation\">,<\/span><br \/>\n                <span class=\"token keyword\">const<\/span> regex<span class=\"token operator\">&amp;<\/span> re<span class=\"token punctuation\">,<\/span><br \/>\n                regex_constants<span class=\"token operator\">::<\/span>match_flag_type flags <span class=\"token operator\">&#061;<\/span> regex_constants<span class=\"token operator\">::<\/span>match_default<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <\/li>\n<li>\n<p>\u5173\u952e\u884c\u4e3a&#xff1a;\u6bcf\u6b21\u89e3\u5f15\u7528 (*it) \u8fd4\u56de\u4e00\u4e2a smatch \u5bf9\u8c61&#xff0c;\u5305\u542b\u5f53\u524d\u5339\u914d\u7684\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>sregex_token_iterator \u539f\u578b<\/p>\n<p> <span class=\"token keyword\">typedef<\/span> regex_token_iterator<span class=\"token operator\">&lt;<\/span>string<span class=\"token operator\">::<\/span>const_iterator<span class=\"token operator\">&gt;<\/span> sregex_token_iterator<span class=\"token punctuation\">;<\/span>\n <\/li>\n<ul>\n<li>\n<p>\u4f5c\u7528&#xff1a;\u7528\u4e8e\u904d\u5386\u5339\u914d\u7684\u5b50\u7ec4\u6216\u672a\u5339\u914d\u7684\u95f4\u9694&#xff08;\u7c7b\u4f3c\u62c6\u5206\u5b57\u7b26\u4e32&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u6784\u9020\u51fd\u6570&#xff1a;<\/p>\n<p> <span class=\"token function\">sregex_token_iterator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u9ed8\u8ba4\u6784\u9020&#xff08;\u7ed3\u675f\u8fed\u4ee3\u5668&#xff09;<\/span><br \/>\n<span class=\"token function\">sregex_token_iterator<\/span><span class=\"token punctuation\">(<\/span>string<span class=\"token operator\">::<\/span>const_iterator first<span class=\"token punctuation\">,<\/span><br \/>\n                      string<span class=\"token operator\">::<\/span>const_iterator last<span class=\"token punctuation\">,<\/span><br \/>\n                      <span class=\"token keyword\">const<\/span> regex<span class=\"token operator\">&amp;<\/span> re<span class=\"token punctuation\">,<\/span><br \/>\n                      <span class=\"token keyword\">int<\/span> submatch <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token comment\">\/\/ \u6307\u5b9a\u5b50\u7ec4\u7d22\u5f15 <\/span><br \/>\n                      regex_constants<span class=\"token operator\">::<\/span>match_flag_type flags <span class=\"token operator\">&#061;<\/span> regex_constants<span class=\"token operator\">::<\/span>match_default<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u652f\u6301\u591a\u4e2a\u5b50\u7ec4\u7684\u7248\u672c&#xff08;\u901a\u8fc7 initializer_list \u6216\u5411\u91cf\u6307\u5b9a&#xff09;<\/span><br \/>\n<span class=\"token function\">sregex_token_iterator<\/span><span class=\"token punctuation\">(<\/span>string<span class=\"token operator\">::<\/span>const_iterator first<span class=\"token punctuation\">,<\/span><br \/>\n                      string<span class=\"token operator\">::<\/span>const_iterator last<span class=\"token punctuation\">,<\/span><br \/>\n                      <span class=\"token keyword\">const<\/span> regex<span class=\"token operator\">&amp;<\/span> re<span class=\"token punctuation\">,<\/span><br \/>\n                      <span class=\"token keyword\">const<\/span> std<span class=\"token operator\">::<\/span>vector<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token operator\">&amp;<\/span> submatches<span class=\"token punctuation\">,<\/span><br \/>\n                      regex_constants<span class=\"token operator\">::<\/span>match_flag_type flags <span class=\"token operator\">&#061;<\/span> regex_constants<span class=\"token operator\">::<\/span>match_default<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <\/li>\n<li>\n<p>\u5173\u952e\u884c\u4e3a&#xff1a;<\/p>\n<ul>\n<li>\u82e5 submatch \u4e3a 0&#xff0c;\u8fd4\u56de\u6574\u4e2a\u5339\u914d\u3002<\/li>\n<li>\u82e5 submatch \u4e3a -1&#xff0c;\u8fd4\u56de\u672a\u5339\u914d\u7684\u95f4\u9694&#xff08;\u76f8\u5f53\u4e8e\u62c6\u5206\u5b57\u7b26\u4e32&#xff09;\u3002<\/li>\n<li>\u652f\u6301\u901a\u8fc7\u5217\u8868\u6307\u5b9a\u591a\u4e2a\u5b50\u7ec4&#xff08;\u5982 {1,2}&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u793a\u4f8b\u4ee3\u7801<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;regex&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;abc-123 xyz-456&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>regex <span class=\"token function\">re<\/span><span class=\"token punctuation\">(<\/span><span class=\"token raw-string string\">R&#034;((\\\\w&#043;)-(\\\\d&#043;))&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ sregex_iterator \u793a\u4f8b&#xff1a;\u904d\u5386\u6240\u6709\u5339\u914d <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>sregex_iterator <span class=\"token function\">it<\/span><span class=\"token punctuation\">(<\/span>text<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> text<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>sregex_iterator end<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span> it <span class=\"token operator\">!&#061;<\/span> end<span class=\"token punctuation\">;<\/span> <span class=\"token operator\">&#043;&#043;<\/span>it<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Full match: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> it<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Group 1: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>it<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ sregex_token_iterator \u793a\u4f8b&#xff1a;\u63d0\u53d6\u6240\u6709\u5b50\u7ec41 <\/span><br \/>\n    std<span class=\"token operator\">::<\/span>sregex_token_iterator <span class=\"token function\">tok_it<\/span><span class=\"token punctuation\">(<\/span>text<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> text<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> re<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>sregex_token_iterator tok_end<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">;<\/span> tok_it <span class=\"token operator\">!&#061;<\/span> tok_end<span class=\"token punctuation\">;<\/span> <span class=\"token operator\">&#043;&#043;<\/span>tok_it<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Group 1 content: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token operator\">*<\/span>tok_it <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa\u7ed3\u679c:<\/p>\n<p>   Full match: abc-123<br \/>\nGroup 1: abc<br \/>\nFull match: xyz-456<br \/>\nGroup 1: xyz<br \/>\nGroup 1 content: abc<br \/>\nGroup 1 content: xyz<\/p>\n<p>\u5173\u952e\u533a\u522b<\/p>\n<table>\n<tr>\u7279\u6027sregex_iteratorsregex_token_iterator<\/tr>\n<tbody>\n<tr>\n<td>\u8fd4\u56de\u5185\u5bb9<\/td>\n<td>\u5b8c\u6574\u7684 smatch 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