{"id":39287,"date":"2025-05-23T09:48:56","date_gmt":"2025-05-23T01:48:56","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/39287.html"},"modified":"2025-05-23T09:48:56","modified_gmt":"2025-05-23T01:48:56","slug":"c-std%e5%ba%93%e4%b8%ad%e7%9a%84%e6%96%87%e4%bb%b6%e6%93%8d%e4%bd%9c%e5%ad%a6%e4%b9%a0%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/39287.html","title":{"rendered":"c++ std\u5e93\u4e2d\u7684\u6587\u4ef6\u64cd\u4f5c\u5b66\u4e60\u7b14\u8bb0"},"content":{"rendered":"<h2>1. \u6982\u8ff0<\/h2>\n<p>C&#043;&#043;\u6807\u51c6\u5e93\u63d0\u4f9b\u4e86 \u5934\u6587\u4ef6\u4e2d\u7684\u51e0\u4e2a\u7c7b\u6765\u8fdb\u884c\u6587\u4ef6\u64cd\u4f5c&#xff0c;\u8fd9\u4e9b\u7c7b\u5c01\u88c5\u4e86\u5e95\u5c42\u7684\u6587\u4ef6\u64cd\u4f5c&#xff0c;\u63d0\u4f9b\u4e86\u9762\u5411\u5bf9\u8c61\u548c\u7c7b\u578b\u5b89\u5168\u7684\u63a5\u53e3&#xff0c;\u4f7f\u5f97\u6587\u4ef6\u8bfb\u5199\u66f4\u52a0\u4fbf\u6377\u548c\u9ad8\u6548\u3002\u4e3b\u8981\u7684\u6587\u4ef6\u6d41\u7c7b\u5305\u62ec&#xff1a;<\/p>\n<p>std::ifstream&#xff1a;\u7528\u4e8e\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u3002<\/p>\n<p>std::ofstream&#xff1a;\u7528\u4e8e\u5411\u6587\u4ef6\u4e2d\u5199\u5165\u6570\u636e\u3002<\/p>\n<p>std::fstream&#xff1a;\u7528\u4e8e\u540c\u65f6\u8bfb\u53d6\u548c\u5199\u5165\u6587\u4ef6\u3002<\/p>\n<p>\u8fd9\u4e9b\u6587\u4ef6\u6d41\u7c7b&#xff08;std::ifstream\u3001std::ofstream\u3001std::fstream&#xff09;\u7ee7\u627f\u81ea std::istream\u3001std::ostream \u548c std::iostream&#xff0c;\u8fd9\u4e9b\u7c7b\u672c\u8eab\u7ee7\u627f\u81ea std::ios&#xff0c;\u4ece\u800c\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u6210\u5458\u51fd\u6570\u548c\u64cd\u4f5c\u7b26\u6765\u5904\u7406\u6587\u4ef6I\/O\u3002<\/p>\n<h2>2. \u6587\u4ef6\u6d41\u7c7b\u8be6\u89e3<\/h2>\n<h3>2.1 std::ifstream&#xff1a;\u8f93\u5165\u6587\u4ef6\u6d41<\/h3>\n<p>std::ifstream \u7528\u4e8e\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u3002\u5b83\u7ee7\u627f\u81ea std::istream&#xff0c;\u5177\u5907\u6240\u6709\u8f93\u5165\u6d41\u7684\u529f\u80fd&#xff0c;\u540c\u65f6\u6dfb\u52a0\u4e86\u6587\u4ef6\u7279\u6709\u7684\u64cd\u4f5c\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;fstream&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><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\u5e76\u6253\u5f00\u8f93\u5165\u6587\u4ef6\u6d41<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>ifstream <span class=\"token function\">infile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;input.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ &#034;input.txt&#034; \u662f\u8981\u8bfb\u53d6\u7684\u6587\u4ef6\u540d<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u68c0\u67e5\u6587\u4ef6\u662f\u5426\u6210\u529f\u6253\u5f00<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>infile<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;\u65e0\u6cd5\u6253\u5f00\u6587\u4ef6 input.txt&#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\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8bfb\u53d6\u5e76\u8f93\u51fa\u6587\u4ef6\u5185\u5bb9<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string line<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>infile<span class=\"token punctuation\">,<\/span> line<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> line <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\">\/\/ \u5173\u95ed\u6587\u4ef6\u6d41&#xff08;\u53ef\u9009&#xff0c;\u56e0\u4e3a\u6790\u6784\u51fd\u6570\u4f1a\u81ea\u52a8\u5173\u95ed&#xff09;<\/span><br \/>\n    infile<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><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>\u8981\u70b9&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u6784\u9020\u51fd\u6570\u53ef\u4ee5\u5728\u521b\u5efa\u5bf9\u8c61\u65f6\u6307\u5b9a\u6587\u4ef6\u540d\u548c\u6253\u5f00\u6a21\u5f0f\u3002<\/p>\n<\/li>\n<li>\n<p>\u68c0\u67e5\u6587\u4ef6\u662f\u5426\u6210\u529f\u6253\u5f00&#xff0c;\u4ee5\u907f\u514d\u540e\u7eed\u64cd\u4f5c\u9519\u8bef\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528 std::getline \u9010\u884c\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>2.2 std::ofstream&#xff1a;\u8f93\u51fa\u6587\u4ef6\u6d41<\/h2>\n<p>std::ofstream \u7528\u4e8e\u5411\u6587\u4ef6\u4e2d\u5199\u5165\u6570\u636e\u3002\u5b83\u7ee7\u627f\u81ea std::ostream&#xff0c;\u5177\u5907\u6240\u6709\u8f93\u51fa\u6d41\u7684\u529f\u80fd&#xff0c;\u540c\u65f6\u6dfb\u52a0\u4e86\u6587\u4ef6\u7279\u6709\u7684\u64cd\u4f5c\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;fstream&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><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\u5e76\u6253\u5f00\u8f93\u51fa\u6587\u4ef6\u6d41<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>ofstream <span class=\"token function\">outfile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;output.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ &#034;output.txt&#034; \u662f\u8981\u5199\u5165\u7684\u6587\u4ef6\u540d<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u68c0\u67e5\u6587\u4ef6\u662f\u5426\u6210\u529f\u6253\u5f00<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>outfile<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;\u65e0\u6cd5\u6253\u5f00\u6587\u4ef6 output.txt&#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\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5199\u5165\u6570\u636e\u5230\u6587\u4ef6<\/span><br \/>\n    outfile <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Hello, World!&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    outfile <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u8fd9\u662f\u7b2c\u4e8c\u884c\u6587\u672c\u3002&#034;<\/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 comment\">\/\/ \u5173\u95ed\u6587\u4ef6\u6d41&#xff08;\u53ef\u9009&#xff0c;\u56e0\u4e3a\u6790\u6784\u51fd\u6570\u4f1a\u81ea\u52a8\u5173\u95ed&#xff09;<\/span><br \/>\n    outfile<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><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>\u8981\u70b9&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b&#xff0c;std::ofstream \u4ee5\u5199\u5165\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6\u3002\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728&#xff0c;\u4f1a\u521b\u5efa\u65b0\u6587\u4ef6&#xff1b;\u5982\u679c\u6587\u4ef6\u5b58\u5728&#xff0c;\u4f1a\u622a\u65ad\u6587\u4ef6\u5185\u5bb9\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528&lt;&lt;\u64cd\u4f5c\u7b26\u5411\u6587\u4ef6\u4e2d\u63d2\u5165\u6570\u636e\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>2.3 std::fstream&#xff1a;\u6587\u4ef6\u6d41&#xff08;\u8bfb\u5199&#xff09;<\/h3>\n<p>std::fstream \u7528\u4e8e\u540c\u65f6\u8bfb\u53d6\u548c\u5199\u5165\u6587\u4ef6\u3002\u5b83\u7ee7\u627f\u81eastd::iostream&#xff0c;\u7ed3\u5408\u4e86 std::istream \u548c std::ostream \u7684\u529f\u80fd<\/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;fstream&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><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\u5e76\u6253\u5f00\u6587\u4ef6\u6d41&#xff0c;\u8bbe\u7f6e\u4e3a\u8bfb\u5199\u6a21\u5f0f<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>fstream <span class=\"token function\">file<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;file.txt&#034;<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>in <span class=\"token operator\">|<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>out <span class=\"token operator\">|<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>app<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u68c0\u67e5\u6587\u4ef6\u662f\u5426\u6210\u529f\u6253\u5f00<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>file<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;\u65e0\u6cd5\u6253\u5f00\u6587\u4ef6 file.txt&#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\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5199\u5165\u6570\u636e\u5230\u6587\u4ef6<\/span><br \/>\n    file <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u8ffd\u52a0\u4e00\u884c\u5185\u5bb9\u3002&#034;<\/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 comment\">\/\/ \u79fb\u52a8\u8bfb\u6307\u9488\u5230\u6587\u4ef6\u5f00\u5934<\/span><br \/>\n    file<span class=\"token punctuation\">.<\/span><span class=\"token function\">seekg<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>beg<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8bfb\u53d6\u5e76\u8f93\u51fa\u6587\u4ef6\u5185\u5bb9<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string line<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>file<span class=\"token punctuation\">,<\/span> line<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> line <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\">\/\/ \u5173\u95ed\u6587\u4ef6\u6d41<\/span><br \/>\n    file<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><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>\u8981\u70b9&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u901a\u8fc7\u6784\u9020\u51fd\u6570\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\u6307\u5b9a\u6587\u4ef6\u6253\u5f00\u6a21\u5f0f&#xff0c;\u53ef\u4ee5\u7ec4\u5408\u591a\u4e2a\u6a21\u5f0f\u3002<\/p>\n<\/li>\n<li>\n<p>\u9002\u7528\u4e8e\u9700\u8981\u540c\u65f6\u8fdb\u884c\u8bfb\u53d6\u548c\u5199\u5165\u64cd\u4f5c\u7684\u573a\u666f\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>3. \u6253\u5f00\u548c\u5173\u95ed\u6587\u4ef6<\/h2>\n<p>\u6587\u4ef6\u6d41\u7c7b\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u5f0f\u6765\u6253\u5f00\u548c\u5173\u95ed\u6587\u4ef6\u3002<\/p>\n<p>\u53ef\u4ee5\u5728\u521b\u5efa\u6587\u4ef6\u6d41\u5bf9\u8c61\u65f6&#xff0c;\u901a\u8fc7\u6784\u9020\u51fd\u6570\u76f4\u63a5\u6307\u5b9a\u6587\u4ef6\u540d\u548c\u6253\u5f00\u6a21\u5f0f\u3002<\/p>\n<p>std<span class=\"token operator\">::<\/span>ifstream <span class=\"token function\">infile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;input.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u4ee5\u9ed8\u8ba4\u6a21\u5f0f(\u5373\u53ea\u8bfb\u65b9\u5f0f)\u6253\u5f00 input.txt<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>ofstream <span class=\"token function\">outfile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;output.txt&#034;<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>out <span class=\"token operator\">|<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>trunc<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u4ee5\u5199\u5165\u548c\u622a\u65ad\u6a21\u5f0f\u6253\u5f00 output.txt<\/span><\/p>\n<p>\u5982\u679c\u5728\u521b\u5efa\u5bf9\u8c61\u65f6\u6ca1\u6709\u6307\u5b9a\u6587\u4ef6\u540d&#xff0c;\u53ef\u4ee5\u4f7f\u7528 open() \u6210\u5458\u51fd\u6570\u5728\u540e\u7eed\u6253\u5f00\u6587\u4ef6\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;fstream&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>ifstream infile<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u521b\u5efa\u8f93\u5165\u6587\u4ef6\u6d41\u5bf9\u8c61<\/span><br \/>\n    infile<span class=\"token punctuation\">.<\/span><span class=\"token function\">open<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;input.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6253\u5f00\u6587\u4ef6<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>infile<span class=\"token punctuation\">.<\/span><span class=\"token function\">is_open<\/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;\u65e0\u6cd5\u6253\u5f00\u6587\u4ef6 input.txt&#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\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8fdb\u884c\u8bfb\u53d6\u64cd\u4f5c&#8230;<\/span><\/p>\n<p>    infile<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5173\u95ed\u6587\u4ef6<\/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>\u4f7f\u7528 close() \u6210\u5458\u51fd\u6570\u53ef\u4ee5\u663e\u5f0f\u5173\u95ed\u6587\u4ef6\u6d41\u3002\u5c3d\u7ba1\u5728\u5bf9\u8c61\u9500\u6bc1\u65f6&#xff0c;\u6790\u6784\u51fd\u6570\u4f1a\u81ea\u52a8\u5173\u95ed\u6587\u4ef6&#xff0c;\u4f46\u5728\u9700\u8981\u63d0\u524d\u91ca\u653e\u8d44\u6e90\u65f6&#xff0c;\u663e\u5f0f\u8c03\u7528 close() \u662f\u5fc5\u8981\u7684\u3002<\/p>\n<p>infile<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\noutfile<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h2>4. \u6587\u4ef6\u6253\u5f00\u6a21\u5f0f<\/h2>\n<p>\u6587\u4ef6\u6253\u5f00\u6a21\u5f0f\u901a\u8fc7 std::ios::openmode \u679a\u4e3e\u7c7b\u578b\u6307\u5b9a&#xff0c;\u53ef\u4ee5\u7ec4\u5408\u4f7f\u7528\u591a\u4e2a\u6a21\u5f0f\u3002<\/p>\n<p>\u5e38\u7528\u7684\u6253\u5f00\u6a21\u5f0f&#xff1a;<\/p>\n<p>&#8211; std::ios::in&#xff1a;\u4ee5\u8bfb\u53d6\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6\u3002<\/p>\n<ul>\n<li>\n<p>std::ios::out&#xff1a;\u4ee5\u5199\u5165\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6\u3002<\/p>\n<\/li>\n<li>\n<p>std::ios::app&#xff1a;\u4ee5\u8ffd\u52a0\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6&#xff0c;\u5199\u5165\u64cd\u4f5c\u5c06\u6dfb\u52a0\u5230\u6587\u4ef6\u672b\u5c3e\u3002<\/p>\n<\/li>\n<li>\n<p>std::ios::ate&#xff1a;\u6253\u5f00\u6587\u4ef6\u540e&#xff0c;\u5c06\u6587\u4ef6\u6307\u9488\u5b9a\u4f4d\u5230\u6587\u4ef6\u672b\u5c3e\u3002<\/p>\n<\/li>\n<li>\n<p>std::ios::trunc&#xff1a;\u5982\u679c\u6587\u4ef6\u5df2\u5b58\u5728&#xff0c;\u5219\u622a\u65ad\u6587\u4ef6\u957f\u5ea6\u4e3a0&#xff08;\u9ed8\u8ba4\u4e0e std::ofstream \u76f8\u5173&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>std::ios::binary&#xff1a;\u4ee5\u4e8c\u8fdb\u5236\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6\u3002<\/p>\n<\/li>\n<\/ul>\n<p><span class=\"token comment\">\/\/ \u4ee5\u8bfb\u5199\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6&#xff0c;\u4e0d\u622a\u65ad\u73b0\u6709\u5185\u5bb9<\/span><br \/>\nstd<span class=\"token operator\">::<\/span>fstream <span class=\"token function\">file<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;data.txt&#034;<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>in <span class=\"token operator\">|<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>out<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4ee5\u4e8c\u8fdb\u5236\u6a21\u5f0f\u5199\u5165\u6570\u636e, \u622a\u65ad\u73b0\u6709\u6587\u4ef6\u5185\u5bb9<\/span><\/p>\n<p>std<span class=\"token operator\">::<\/span>ofstream <span class=\"token function\">binaryOut<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;data.bin&#034;<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>out <span class=\"token operator\">|<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>binary <span class=\"token operator\">|<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>trunc<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u7ec4\u5408\u4f7f\u7528&#xff1a;\u901a\u8fc7\u6309\u4f4d\u6216\u64cd\u4f5c\u7b26 | \u7ec4\u5408\u591a\u4e2a\u6253\u5f00\u6a21\u5f0f&#xff0c;\u5982 std::ios::in | std::ios::out \u8868\u793a\u540c\u65f6\u5177\u5907\u8bfb\u53d6\u548c\u5199\u5165\u6743\u9650\u3002<\/p>\n<\/li>\n<li>\n<p>\u4e8c\u8fdb\u5236\u6a21\u5f0f&#xff1a;\u5bf9\u4e8e\u975e\u6587\u672c\u6587\u4ef6&#xff08;\u5982\u56fe\u7247\u3001\u97f3\u9891\u7b49&#xff09;&#xff0c;\u5e94\u4f7f\u7528 std::ios::binary \u6a21\u5f0f&#xff0c;\u4ee5\u9632\u6b62\u6570\u636e\u5728\u8bfb\u53d6\u6216\u5199\u5165\u8fc7\u7a0b\u4e2d\u88ab\u8f6c\u6362\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>5. \u8bfb\u53d6\u6587\u4ef6<\/h2>\n<h3>5.1 \u4f7f\u7528 &gt;&gt; \u64cd\u4f5c\u7b26\u8bfb\u53d6\u5355\u8bcd<\/h3>\n<p>&gt;&gt; \u64cd\u4f5c\u7b26\u7528\u4e8e\u4ece\u6587\u4ef6\u4e2d\u63d0\u53d6\u6570\u636e&#xff0c;\u81ea\u52a8\u8df3\u8fc7\u7a7a\u767d\u5b57\u7b26&#xff08;\u5982\u7a7a\u683c\u3001\u6362\u884c\u7b26\u3001\u5236\u8868\u7b26&#xff09;\u3002<\/p>\n<p>\u5047\u8bbe words.txt \u6587\u4ef6\u5185\u5bb9\u5982\u4e0b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250523014854-682fd406c4f5e.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/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;fstream&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><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>ifstream <span class=\"token function\">infile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;words.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>infile<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;\u65e0\u6cd5\u6253\u5f00\u6587\u4ef6 words.txt&#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\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>string word<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>infile <span class=\"token operator\">&gt;&gt;<\/span> word<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ \u9010\u8bcd\u8bfb\u53d6<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u8bfb\u53d6\u5230\u7684\u5355\u8bcd: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> word <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>    infile<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/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\u5982\u4e0b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250523014854-682fd406d4595.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u9002\u7528\u4e8e\u9010\u8bcd\u8bfb\u53d6\u6570\u636e&#xff0c;\u9002\u5408\u5904\u7406\u7531\u7a7a\u767d\u5b57\u7b26\u5206\u9694\u7684\u6570\u636e\u3002<\/p>\n<\/li>\n<li>\n<p>\u65e0\u6cd5\u8bfb\u53d6\u5305\u542b\u7a7a\u683c\u7684\u5b8c\u6574\u53e5\u5b50\u6216\u77ed\u8bed\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>5.2 \u4f7f\u7528 std::getline \u9010\u884c\u8bfb\u53d6<\/h3>\n<p>std::getline \u51fd\u6570\u7528\u4e8e\u4ece\u6587\u4ef6\u4e2d\u9010\u884c\u8bfb\u53d6\u6570\u636e&#xff0c;\u9002\u7528\u4e8e\u5904\u7406\u6587\u672c\u6587\u4ef6\u4e2d\u7684\u884c\u6570\u636e\u3002<\/p>\n<p>\u5047\u8bbe lines.txt \u6587\u4ef6\u5185\u5bb9\u5982\u4e0b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250523014854-682fd406e3cd2.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/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;fstream&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><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>ifstream <span class=\"token function\">infile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;lines.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>infile<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;\u65e0\u6cd5\u6253\u5f00\u6587\u4ef6 lines.txt&#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\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    std<span class=\"token operator\">::<\/span>string line<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>infile<span class=\"token punctuation\">,<\/span> line<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ \u9010\u884c\u8bfb\u53d6<\/span><br \/>\n        std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u8bfb\u53d6\u5230\u7684\u884c: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> line <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>    infile<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/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\u5982\u4e0b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250523014854-682fd406efa6c.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u9002\u7528\u4e8e\u9010\u884c\u5904\u7406\u6587\u4ef6\u5185\u5bb9&#xff0c;\u4fdd\u7559\u6bcf\u884c\u7684\u5b8c\u6574\u4fe1\u606f\u3002<\/p>\n<\/li>\n<li>\n<p>\u53ef\u4ee5\u5904\u7406\u5305\u542b\u7a7a\u683c\u548c\u5176\u4ed6\u7279\u6b8a\u5b57\u7b26\u7684\u884c\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>5.3 \u8bfb\u53d6\u6574\u4e2a\u6587\u4ef6\u5185\u5bb9<\/h3>\n<p>\u6709\u65f6\u9700\u8981\u4e00\u6b21\u6027\u8bfb\u53d6\u6574\u4e2a\u6587\u4ef6\u5185\u5bb9&#xff0c;\u5c24\u5176\u9002\u7528\u4e8e\u5c0f\u6587\u4ef6\u6216\u9700\u8981\u5bf9\u6574\u4e2a\u6587\u4ef6\u5185\u5bb9\u8fdb\u884c\u5904\u7406\u7684\u573a\u666f\u3002 \u5047\u8bbe content.txt \u6587\u4ef6\u5185\u5bb9\u5982\u4e0b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250523014855-682fd407087b1.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/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;fstream&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><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>ifstream <span class=\"token function\">infile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;content.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>infile<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;\u65e0\u6cd5\u6253\u5f00\u6587\u4ef6 content.txt&#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\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u4f7f\u7528\u8fed\u4ee3\u5668\u8bfb\u53d6\u6574\u4e2a\u6587\u4ef6\u5185\u5bb9\u5230\u5b57\u7b26\u4e32<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>string <span class=\"token function\">content<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span>istreambuf_iterator<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">(<\/span>infile<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                        std<span class=\"token operator\">::<\/span>istreambuf_iterator<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">(<\/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>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u6587\u4ef6\u5185\u5bb9:\\\\n&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> content <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><\/p>\n<p>    infile<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/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\u5982\u4e0b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250523014855-682fd40715d96.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u8bf4\u660e&#xff1a;<\/p>\n<p>\u4f7f\u7528 std::istreambuf_iterator \u8fed\u4ee3\u5668\u53ef\u4ee5\u9ad8\u6548\u5730\u8bfb\u53d6\u6574\u4e2a\u6587\u4ef6\u5185\u5bb9\u3002<\/p>\n<p>\u9002\u7528\u4e8e\u5c0f\u81f3\u4e2d\u7b49\u5927\u5c0f\u7684\u6587\u4ef6&#xff0c;\u5bf9\u4e8e\u975e\u5e38\u5927\u7684\u6587\u4ef6&#xff0c;\u53ef\u80fd\u9700\u8981\u5206\u5757\u8bfb\u53d6\u4ee5\u907f\u514d\u5185\u5b58\u95ee\u9898\u3002<\/p>\n<p>\u5bf9\u6b64\u884c\u4ee3\u7801\u7684\u7406\u89e3&#xff1a;<\/p>\n<p>std<span class=\"token operator\">::<\/span>string <span class=\"token function\">content<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token operator\">::<\/span>istreambuf_iterator<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">(<\/span>infile<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                    std<span class=\"token operator\">::<\/span>istreambuf_iterator<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\n<p>\u8fd9\u884c\u4ee3\u7801\u4f7f\u7528\u4e86 std::istreambuf_iterator \u6765\u4ece\u8f93\u5165\u6587\u4ef6\u6d41 infile \u8bfb\u53d6\u5185\u5bb9\u5e76\u6784\u5efa\u4e00\u4e2a std::string \u5bf9\u8c61\u3002\u5177\u4f53\u7406\u89e3\u5982\u4e0b&#xff1a;<\/p>\n<\/li>\n<li>\n<p>std::istreambuf_iterator(infile)&#xff1a;\u521b\u5efa\u4e00\u4e2a\u8f93\u5165\u8fed\u4ee3\u5668&#xff0c;\u4ece infile \u7684\u7f13\u51b2\u533a\u8bfb\u53d6\u5b57\u7b26\u3002<\/p>\n<\/li>\n<li>\n<p>std::istreambuf_iterator()&#xff1a;\u8fd9\u662f\u4e00\u4e2a\u7a7a\u7684\u8fed\u4ee3\u5668&#xff0c;\u7528\u4e8e\u8868\u793a\u8f93\u5165\u7ed3\u675f\u3002 \u6784\u9020 std::string&#xff1a;\u901a\u8fc7\u4f20\u5165\u4e24\u4e2a\u8fed\u4ee3\u5668&#xff0c;\u6784\u9020\u51fd\u6570\u4f1a\u4ece infile \u4e2d\u8bfb\u53d6\u6240\u6709\u5b57\u7b26&#xff0c;\u76f4\u5230\u9047\u5230\u7ed3\u675f\u8fed\u4ee3\u5668\u3002<\/p>\n<\/li>\n<li>\n<p>\u6700\u7ec8&#xff0c;\u8fd9\u884c\u4ee3\u7801\u7684\u4f5c\u7528\u662f\u5c06\u6574\u4e2a\u6587\u4ef6\u7684\u5185\u5bb9\u8bfb\u5165\u5230 content \u5b57\u7b26\u4e32\u4e2d\u3002\u8fd9\u6837&#xff0c;\u4f60\u5c31\u53ef\u4ee5\u65b9\u4fbf\u5730\u5bf9\u6587\u4ef6\u5185\u5bb9\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>5.4 \u8bfb\u53d6\u4e8c\u8fdb\u5236\u6570\u636e<\/h3>\n<p>\u5bf9\u4e8e\u975e\u6587\u672c\u6587\u4ef6&#xff08;\u5982\u56fe\u7247\u3001\u97f3\u9891\u3001\u89c6\u9891\u7b49&#xff09;&#xff0c;\u9700\u8981\u4ee5\u4e8c\u8fdb\u5236\u6a21\u5f0f\u8bfb\u53d6\u6570\u636e&#xff0c;\u4ee5\u9632\u6b62\u6570\u636e\u5728\u8bfb\u53d6\u8fc7\u7a0b\u4e2d\u88ab\u8f6c\u6362\u6216\u4e22\u5931\u3002 \u5047\u8bbe\u9700\u8981\u8bfb\u53d6\u4e00\u4e2a\u56fe\u7247\u6587\u4ef6 image.jpg \u5e76\u8f93\u51fa\u5176\u5927\u5c0f\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250523014855-682fd40723708.jpg\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/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;fstream&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><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;vector&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\">\/\/ \u4ee5\u4e8c\u8fdb\u5236\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>ifstream <span class=\"token function\">infile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;image.jpg&#034;<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>binary<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>infile<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;\u65e0\u6cd5\u6253\u5f00\u6587\u4ef6 image.jpg&#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\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u79fb\u52a8\u8bfb\u6307\u9488\u5230\u6587\u4ef6\u672b\u5c3e\u4ee5\u83b7\u53d6\u6587\u4ef6\u5927\u5c0f<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/\u8fd9\u884c\u4ee3\u7801\u5c06\u6587\u4ef6\u6307\u9488\u79fb\u52a8\u5230\u6587\u4ef6\u7684\u672b\u5c3e\u3002seekg \u51fd\u6570\u7528\u4e8e\u8bbe\u7f6e\u8f93\u5165\u6d41\u7684\u4f4d\u7f6e&#xff0c;0 \u662f\u504f\u79fb\u91cf<\/span><br \/>\n    infile<span class=\"token punctuation\">.<\/span><span class=\"token function\">seekg<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>end<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/tellg \u51fd\u6570\u8fd4\u56de\u5f53\u524d\u6587\u4ef6\u6307\u9488\u7684\u4f4d\u7f6e&#xff08;\u5373\u6587\u4ef6\u7684\u957f\u5ea6&#xff09;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>streamsize size <span class=\"token operator\">&#061;<\/span> infile<span class=\"token punctuation\">.<\/span><span class=\"token function\">tellg<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/\u8fd9\u884c\u4ee3\u7801\u5c06\u6587\u4ef6\u6307\u9488\u91cd\u7f6e\u56de\u6587\u4ef6\u7684\u5f00\u5934<\/span><br \/>\n    infile<span class=\"token punctuation\">.<\/span><span class=\"token function\">seekg<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>beg<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u5230\u7f13\u51b2\u533a<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>vector<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token function\">buffer<\/span><span class=\"token punctuation\">(<\/span>size<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>infile<span class=\"token punctuation\">.<\/span><span class=\"token function\">read<\/span><span class=\"token punctuation\">(<\/span>buffer<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> size<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;\u6210\u529f\u8bfb\u53d6 &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> size <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; \u5b57\u8282\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> <span class=\"token keyword\">else<\/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;\u8bfb\u53d6\u6587\u4ef6\u5931\u8d25&#xff01;&#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>    infile<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/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\u5982\u4e0b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250523014855-682fd407802fd.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u4f7f\u7528 std::ios::binary \u6a21\u5f0f\u6253\u5f00\u6587\u4ef6&#xff0c;\u786e\u4fdd\u6570\u636e\u6309\u539f\u6837\u8bfb\u53d6\u3002<\/p>\n<\/li>\n<li>\n<p>\u901a\u8fc7 seekg \u548ctellg\u83b7\u53d6\u6587\u4ef6\u5927\u5c0f&#xff0c;\u9884\u5206\u914d\u7f13\u51b2\u533a\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528read\u51fd\u6570\u8bfb\u53d6\u4e8c\u8fdb\u5236\u6570\u636e\u5230\u7f13\u51b2\u533a\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>6. \u5199\u5165\u6587\u4ef6<\/h2>\n<h3>6.1 \u4f7f\u7528 &lt;&lt; \u64cd\u4f5c\u7b26\u5199\u5165\u6570\u636e<\/h3>\n<p>&lt;&lt; \u64cd\u4f5c\u7b26\u7528\u4e8e\u5411\u6587\u4ef6\u4e2d\u63d2\u5165\u6570\u636e&#xff0c;\u7c7b\u4f3c\u4e8e\u5411\u6807\u51c6\u8f93\u51fa\u6d41 std::cout \u4e2d\u63d2\u5165\u6570\u636e\u3002<\/p>\n<p>\u5c06\u7528\u6237\u4fe1\u606f\u5199\u5165\u6587\u4ef6 users.txt\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;fstream&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><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>ofstream <span class=\"token function\">outfile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;users.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>outfile<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;\u65e0\u6cd5\u6253\u5f00\u6587\u4ef6 users.txt&#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\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5199\u5165\u7528\u6237\u4fe1\u606f<\/span><br \/>\n    outfile <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u7528\u6237\u540d: Alice\\\\n\u5e74\u9f84: 30\\\\n&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    outfile <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u7528\u6237\u540d: Bob\\\\n\u5e74\u9f84: 25\\\\n&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    outfile <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u7528\u6237\u540d: Charlie\\\\n\u5e74\u9f84: 35\\\\n&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><\/p>\n<p>    outfile<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/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>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u7528\u6237\u4fe1\u606f\u5df2\u5199\u5165 users.txt&#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\">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\u5982\u4e0b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250523014855-682fd4078acba.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u6587\u4ef6\u5373\u81ea\u52a8\u521b\u5efa\u4e8e\u5f53\u524d\u5de5\u7a0b\u6839\u76ee\u5f55\u4e0b<\/p>\n<p>\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u4f7f\u7528 &lt;&lt; \u64cd\u4f5c\u7b26\u53ef\u4ee5\u65b9\u4fbf\u5730\u5c06\u5404\u79cd\u6570\u636e\u7c7b\u578b\u5199\u5165\u6587\u4ef6\u3002<\/p>\n<\/li>\n<li>\n<p>std::endl \u7528\u4e8e\u63d2\u5165\u6362\u884c\u7b26\u5e76\u5237\u65b0\u7f13\u51b2\u533a\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>6.2 \u4f7f\u7528 std::ofstream::write \u5199\u5165\u4e8c\u8fdb\u5236\u6570\u636e<\/h3>\n<p>\u5bf9\u4e8e\u9700\u8981\u5199\u5165\u4e8c\u8fdb\u5236\u6570\u636e\u7684\u573a\u666f&#xff0c;\u4f7f\u7528 write() \u6210\u5458\u51fd\u6570\u66f4\u4e3a\u5408\u9002\u3002<\/p>\n<p>\u5c06\u4e00\u4e2a\u5b57\u7b26\u6570\u7ec4\u5199\u5165\u4e8c\u8fdb\u5236\u6587\u4ef6 output.bin\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;fstream&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><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;vector&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>ofstream <span class=\"token function\">outfile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;output.bin&#034;<\/span><span class=\"token punctuation\">,<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>binary <span class=\"token operator\">|<\/span> std<span class=\"token operator\">::<\/span>ios<span class=\"token operator\">::<\/span>trunc<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>outfile<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;\u65e0\u6cd5\u6253\u5f00\u6587\u4ef6 output.bin&#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\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u51c6\u5907\u4e8c\u8fdb\u5236\u6570\u636e<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>vector<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">&gt;<\/span> data <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#039;H&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;e&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;l&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;l&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;o&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;\\\\0&#039;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5199\u5165\u4e8c\u8fdb\u5236\u6570\u636e\u5230\u6587\u4ef6<\/span><br \/>\n    outfile<span class=\"token punctuation\">.<\/span><span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>data<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> data<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>outfile<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;\u5199\u5165\u6587\u4ef6\u5931\u8d25&#xff01;&#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;\u6210\u529f\u5199\u5165 &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> data<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\">&lt;&lt;<\/span> <span class=\"token string\">&#034; \u5b57\u8282\u5230 output.bin&#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>    outfile<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/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>data.data()&#xff1a;\u83b7\u53d6 data \u5b57\u7b26\u4e32\u7684\u6307\u9488&#xff0c;\u6307\u5411\u5b57\u7b26\u4e32\u7684\u9996\u5b57\u7b26\u3002\u8fd9\u662f\u5199\u5165\u7684\u8d77\u59cb\u5730\u5740\u3002 data.size()&#xff1a;\u8fd4\u56de\u5b57\u7b26\u4e32 data \u7684\u957f\u5ea6&#xff0c;\u8868\u793a\u8981\u5199\u5165\u7684\u5b57\u8282\u6570\u3002 outfile.write(data.data(), data.size());&#xff1a;\u8c03\u7528 write \u51fd\u6570&#xff0c;\u5c06\u4ece data \u6307\u9488\u5f00\u59cb\u7684 data.size() \u5b57\u8282\u5199\u5165 outfile \u4e2d\u3002<\/p>\n<p>\u8f93\u51fa\u5982\u4e0b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250523014855-682fd4079535b.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u4f7f\u7528 write() \u53ef\u4ee5\u6307\u5b9a\u8981\u5199\u5165\u7684\u6570\u636e\u5730\u5740\u548c\u5b57\u8282\u6570&#xff0c;\u9002\u7528\u4e8e\u4e8c\u8fdb\u5236\u6570\u636e\u3002<\/p>\n<\/li>\n<li>\n<p>\u786e\u4fdd\u6587\u4ef6\u4ee5\u4e8c\u8fdb\u5236\u6a21\u5f0f\u6253\u5f00&#xff0c;\u9632\u6b62\u6570\u636e\u88ab\u610f\u5916\u8f6c\u6362\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>7. \u4e00\u4e2a\u5b9e\u9645\u4f7f\u7528\u7684\u793a\u4f8b<\/h2>\n<p>\u8bfb\u53d6mysql\u4e2dconf\u6587\u4ef6\u7684\u914d\u7f6e&#xff1a;<\/p>\n<p><span class=\"token keyword\">bool<\/span> <span class=\"token class-name\">ConnectionPool<\/span><span class=\"token operator\">::<\/span><span class=\"token function\">loadConfigFile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/\/setenv(&#034;MYSQL_CONF_PATH&#034;,&#034;\/home\/kyros1ee\/QtEnviroment\/WeChat-main\/chatserver\/conf\/mysql.conf&#034;,1);<\/span><br \/>\n<span class=\"token comment\">\/\/ \u8bbe\u7f6e\u73af\u5883\u53d8\u91cf\u6216\u7edd\u5bf9\u8def\u5f84<\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> configPath <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">getenv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;MYSQL_CONF&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>configPath<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        LOG_ERROR <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; mysql.conf MYSQL_CONF_PATH not set!&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    ifstream <span class=\"token function\">file<\/span><span class=\"token punctuation\">(<\/span>configPath<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>file<span class=\"token punctuation\">.<\/span><span class=\"token function\">is_open<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        LOG_ERROR <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;mysql.conf \u6587\u4ef6\u4e0d\u5b58\u5728!&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    string line<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">getline<\/span><span class=\"token punctuation\">(<\/span>file<span class=\"token punctuation\">,<\/span> line<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5ffd\u7565\u7a7a\u884c\u548c\u6ce8\u91ca\u884c<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>line<span class=\"token punctuation\">.<\/span><span class=\"token function\">empty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">||<\/span> line<span class=\"token punctuation\">.<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;&#061;&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> string<span class=\"token operator\">::<\/span>npos<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>line<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;\\\\r&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            line<span class=\"token punctuation\">.<\/span><span class=\"token function\">pop_back<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        istringstream <span class=\"token function\">iss<\/span><span class=\"token punctuation\">(<\/span>line<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        string key<span class=\"token punctuation\">,<\/span> value<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">getline<\/span><span class=\"token punctuation\">(<\/span>iss<span class=\"token punctuation\">,<\/span> key<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;&#061;&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token function\">getline<\/span><span class=\"token punctuation\">(<\/span>iss<span class=\"token punctuation\">,<\/span> value<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/ 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