{"id":96907,"date":"2026-08-28T17:40:31","date_gmt":"2026-08-28T09:40:31","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/96907.html"},"modified":"2026-08-28T17:40:31","modified_gmt":"2026-08-28T09:40:31","slug":"c%e5%85%a5%e9%97%a8%e5%9f%ba%e7%a1%80","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/96907.html","title":{"rendered":"C++\u5165\u95e8\u57fa\u7840"},"content":{"rendered":"<h2>c&#043;&#043;\u7b2c\u4e00\u4e2a\u7a0b\u5e8f<\/h2>\n<ul>\n<li>\u6253\u5370helloworld<\/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><\/p>\n<p><span class=\"token comment\">\/\/using namespace std; \u5c55\u5f00\u547d\u540d\u7a7a\u95f4<\/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 \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;helloworld&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/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<h2>\u547d\u540d\u7a7a\u95f4namespace<\/h2>\n<p>\u5728C\/C&#043;&#043;\u4e2d&#xff0c;\u53d8\u91cf\u3001\u51fd\u6570\u548c\u540e\u2faf\u8981\u5b66\u5230\u7684\u7c7b\u90fd\u662f\u2f24\u91cf\u5b58\u5728\u7684&#xff0c;\u8fd9\u4e9b\u53d8\u91cf\u3001\u51fd\u6570\u548c\u7c7b\u7684\u540d\u79f0\u5c06\u90fd\u5b58\u5728\u4e8e\u5168\u5c40\u4f5c\u2f64\u57df\u4e2d&#xff0c;\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5f88\u591a\u51b2\u7a81\u3002\u4f7f\u2f64\u547d\u540d\u7a7a\u95f4\u7684\u2f6c\u7684\u662f\u5bf9\u6807\u8bc6\u7b26\u7684\u540d\u79f0\u8fdb\u2f8f\u672c\u5730\u5316&#xff0c;\u4ee5\u907f\u514d\u547d\u540d\u51b2\u7a81\u6216\u540d\u5b57\u6c61\u67d3&#xff0c;namespace\u5173\u952e\u5b57\u7684\u51fa\u73b0\u5c31\u662f\u9488\u5bf9\u8fd9\u79cd\u95ee\u9898\u7684<\/p>\n<p><span class=\"token keyword\">namespace<\/span> cyy<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">namespace<\/span> dd<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">int<\/span> b <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">333<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">int<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<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<span class=\"token keyword\">int<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> a <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> cyy<span class=\"token double-colon punctuation\">::<\/span>a <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> cyy<span class=\"token double-colon punctuation\">::<\/span>dd<span class=\"token double-colon punctuation\">::<\/span>b <span class=\"token operator\">&lt;&lt;<\/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<ul>\n<li>\u9879\u2f6c\u2f2f\u7a0b\u4e2d\u591a\u2f42\u4ef6\u4e2d\u5b9a\u4e49\u7684\u540c\u540dnamespace\u4f1a\u8ba4\u4e3a\u662f\u2f00\u4e2anamespace&#xff0c;\u4e0d\u4f1a\u51b2\u7a81<\/li>\n<li>C&#043;&#043;\u4e2d\u57df\u6709\u51fd\u6570\u5c40\u90e8\u57df&#xff0c;\u5168\u5c40\u57df&#xff0c;\u547d\u540d\u7a7a\u95f4\u57df&#xff0c;\u7c7b\u57df&#xff1b;\u57df\u5f71\u54cd\u7684\u662f\u7f16\u8bd1\u65f6\u8bed\u6cd5\u67e5\u627e\u2f00\u4e2a\u53d8\u91cf\/\u51fd\u6570\/\u7c7b\u578b\u51fa\u5904(\u58f0\u660e\u6216\u5b9a\u4e49)\u7684\u903b\u8f91&#xff0c;\u6240\u6709\u6709\u4e86\u57df\u9694\u79bb&#xff0c;\u540d\u5b57\u51b2\u7a81\u5c31\u89e3\u51b3\u4e86\u3002\u5c40\u90e8\u57df\u548c\u5168\u5c40\u57df\u9664\u4e86\u4f1a\u5f71\u54cd\u7f16\u8bd1\u67e5\u627e\u903b\u8f91&#xff0c;\u8fd8\u4f1a\u5f71\u54cd\u53d8\u91cf\u7684\u2f63\u547d\u5468\u671f&#xff0c;\u547d\u540d\u7a7a\u95f4\u57df\u548c\u7c7b\u57df\u4e0d\u5f71\u54cd\u53d8\u91cf\u2f63\u547d\u5468\u671f<\/li>\n<li>\u5c55\u5f00\u4e4b\u540e\u5c31\u4e0d\u9700\u8981\u4f7f\u7528\u57df\u4f5c\u7528\u9650\u5b9a\u7b26::\u4e86&#xff0c;\u4f46\u662f\u5c55\u5f00\u5bb9\u6613\u51b2\u7a81<\/li>\n<\/ul>\n<h2>c&#043;&#043;\u8f93\u5165\u8f93\u51fa<\/h2>\n<ul>\n<li>&lt;iostream&gt;\u662fInput Output Stream\u7684\u7f29\u5199&#xff0c;\u662f\u6807\u51c6\u7684\u8f93\u2f0a\u3001\u8f93\u51fa\u6d41\u5e93&#xff0c;\u5b9a\u4e49\u4e86\u6807\u51c6\u7684\u8f93\u2f0a\u3001\u8f93\u51fa\u5bf9\u8c61<\/li>\n<li>std::cin \u662fistream\u7c7b\u7684\u5bf9\u8c61&#xff0c;\u5b83\u4e3b\u8981\u2faf\u5411\u7a84\u5b57\u7b26&#xff08;narrowcharacters(oftypechar)&#xff09;\u7684\u6807\u51c6\u8f93\u2f0a\u6d41<\/li>\n<li>std::cout \u662fostream\u7c7b\u7684\u5bf9\u8c61&#xff0c;\u5b83\u4e3b\u8981\u2faf\u5411\u7a84\u5b57\u7b26\u7684\u6807\u51c6\u8f93\u51fa\u6d41<\/li>\n<li>std::endl \u662f\u2f00\u4e2a\u51fd\u6570&#xff0c;\u6d41\u63d2\u2f0a\u8f93\u51fa\u65f6&#xff0c;\u76f8\u5f53\u4e8e\u63d2\u2f0a\u2f00\u4e2a\u6362\u2f8f\u5b57\u7b26\u52a0\u5237\u65b0\u7f13\u51b2\u533a<\/li>\n<li>&lt;&lt;\u6d41\u63d2\u5165 &gt;&gt;\u6d41\u63d0\u53d6<\/li>\n<li>C&#043;&#043;\u7684\u8f93\u2f0a\u8f93\u51fa\u53ef\u4ee5\u2f83\u52a8\u8bc6\u522b\u53d8\u91cf\u7c7b\u578b<\/li>\n<\/ul>\n<h2>\u7f3a\u7701\u53c2\u6570&#xff08;\u9ed8\u8ba4\u503c&#xff09;<\/h2>\n<ul>\n<li>\u7f3a\u7701\u53c2\u6570\u662f\u58f0\u660e\u6216\u5b9a\u4e49\u51fd\u6570\u65f6\u4e3a\u51fd\u6570\u7684\u53c2\u6570\u6307\u5b9a\u2f00\u4e2a\u7f3a\u7701\u503c\u3002\u5728\u8c03\u2f64\u8be5\u51fd\u6570\u65f6&#xff0c;\u5982\u679c\u6ca1\u6709\u6307\u5b9a\u5b9e\u53c2\u5219\u91c7\u2f64\u8be5\u5f62\u53c2\u7684\u7f3a\u7701\u503c&#xff0c;\u5426\u5219\u4f7f\u2f64\u6307\u5b9a\u7684\u5b9e\u53c2&#xff0c;\u7f3a\u7701\u53c2\u6570\u5206\u4e3a\u5168\u7f3a\u7701\u548c\u534a\u7f3a\u7701\u53c2\u6570<\/li>\n<li>\u5168\u7f3a\u7701\u5c31\u662f\u5168\u90e8\u5f62\u53c2\u7ed9\u7f3a\u7701\u503c&#xff0c;\u534a\u7f3a\u7701\u5c31\u662f\u90e8\u5206\u5f62\u53c2\u7ed9\u7f3a\u7701\u503c\u3002C&#043;&#043;\u89c4\u5b9a\u534a\u7f3a\u7701\u53c2\u6570\u5fc5\u987b\u4ece\u53f3\u5f80\u5de6\u4f9d\u6b21\u8fde\u7eed\u7f3a\u7701&#xff0c;\u4e0d\u80fd\u95f4\u9694\u8df3\u8dc3\u7ed9\u7f3a\u7701\u503c<\/li>\n<li>\u5e26\u7f3a\u7701\u53c2\u6570\u7684\u51fd\u6570\u8c03\u2f64&#xff0c;C&#043;&#043;\u89c4\u5b9a\u5fc5\u987b\u4ece\u5de6\u5230\u53f3\u4f9d\u6b21\u7ed9\u5b9e\u53c2&#xff0c;\u4e0d\u80fd\u8df3\u8dc3\u7ed9\u5b9e\u53c2\u3002<\/li>\n<li>\u5f53\u51fd\u6570\u58f0\u660e\u4e0e\u5b9a\u4e49\u5206\u79bb\u65f6&#xff0c;\u7f3a\u7701\u53c2\u6570\u4e0d\u80fd\u540c\u65f6\u51fa\u73b0\u5728\u58f0\u660e\u548c\u5b9a\u4e49\u4e2d&#xff0c;C&#043;&#043;\u89c4\u5b9a\u7f3a\u7701\u503c\u5fc5\u987b\u5199\u5728\u51fd\u6570\u58f0\u660e\u5904\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">funca<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> a <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\">void<\/span> <span class=\"token function\">funcb<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> a <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\">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 function\">funca<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">funcb<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">100<\/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>a\u51fd\u6570\u4e0d\u4f20\u53c2\u5c31\u7528\u7f3a\u7701\u503c&#xff0c;\u4f20\u53c2\u5c31\u7528\u4f20\u53c2\u503c&#xff0c;b\u53ea\u80fd\u4f20\u53c2\u4f7f\u7528<\/p>\n<p><span class=\"token comment\">\/\/ \u5168\u7f3a\u7701<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">Func1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> b <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> c <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">30<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;a &#061; &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> a <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;b &#061; &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> b <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;c &#061; &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> c <span class=\"token operator\">&lt;&lt;<\/span> endl <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 comment\">\/\/ \u534a\u7f3a\u7701<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">Func2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> b <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> c <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;a &#061; &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> a <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;b &#061; &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> b <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;c &#061; &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> c <span class=\"token operator\">&lt;&lt;<\/span> endl <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u51fd\u6570\u91cd\u8f7d<\/h2>\n<p>C&#043;&#043;\u2f40\u6301\u5728\u540c\u2f00\u4f5c\u2f64\u57df\u4e2d\u51fa\u73b0\u540c\u540d\u51fd\u6570&#xff0c;\u4f46\u662f\u8981\u6c42\u8fd9\u4e9b\u540c\u540d\u51fd\u6570\u7684\u5f62\u53c2\u4e0d\u540c&#xff0c;\u53ef\u4ee5\u662f\u53c2\u6570\u4e2a\u6570\u4e0d\u540c\u6216\u8005\u7c7b\u578b\u4e0d\u540c\u3002\u8fd9\u6837C&#043;&#043;\u51fd\u6570\u8c03\u2f64\u5c31\u8868\u73b0\u51fa\u4e86\u591a\u6001\u884c\u4e3a&#xff0c;\u4f7f\u2f64\u66f4\u7075\u6d3b\u3002C\u8bed\u2f94\u662f\u4e0d\u2f40\u6301\u540c\u2f00\u4f5c\u2f64\u57df\u4e2d\u51fa\u73b0\u540c\u540d\u51fd\u6570\u7684<\/p>\n<p><span class=\"token comment\">\/\/ 1\u3001\u53c2\u6570\u7c7b\u578b\u4e0d\u540c<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">Add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> left<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> right<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;int Add(int left, int right)&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> left <span class=\"token operator\">&#043;<\/span> right<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">double<\/span> <span class=\"token function\">Add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">double<\/span> left<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">double<\/span> right<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;double Add(double left, double right)&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> left <span class=\"token operator\">&#043;<\/span> right<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token comment\">\/\/ 2\u3001\u53c2\u6570\u4e2a\u6570\u4e0d\u540c<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">f<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;f()&#034;<\/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\">void<\/span> <span class=\"token function\">f<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;f(int a)&#034;<\/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 comment\">\/\/ 3\u3001\u53c2\u6570\u7c7b\u578b\u987a\u5e8f\u4e0d\u540c<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">f<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span> b<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;f(int a,char b)&#034;<\/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\">void<\/span> <span class=\"token function\">f<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span> b<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;f(char b, int a)&#034;<\/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 comment\">\/\/ \u4e0b\u2faf\u4e24\u4e2a\u51fd\u6570\u6784\u6210\u91cd\u8f7d<\/span><br \/>\n<span class=\"token comment\">\/\/ f()\u4f46\u662f\u8c03\u2f64\u65f6&#xff0c;\u4f1a\u62a5\u9519&#xff0c;\u5b58\u5728\u6b67\u4e49&#xff0c;\u7f16\u8bd1\u5668\u4e0d\u77e5\u9053\u8c03\u2f64\u8c01<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">f1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;f()&#034;<\/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\">void<\/span> <span class=\"token function\">f1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;f(int a)&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u5f15\u7528&amp;<\/h2>\n<p>\u8bed\u6cd5&#xff1a;\u7c7b\u578b&amp; \u5f15\u2f64\u522b\u540d&#061;\u5f15\u2f64\u5bf9\u8c61;<\/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 keyword\">int<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span><span class=\"token operator\">&amp;<\/span> b <span class=\"token operator\">&#061;<\/span> a<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span><span class=\"token operator\">&amp;<\/span> c <span class=\"token operator\">&#061;<\/span> a<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span><span class=\"token operator\">&amp;<\/span> d <span class=\"token operator\">&#061;<\/span> c<span class=\"token punctuation\">;<\/span><br \/>\nc <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> a <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token operator\">&amp;<\/span>a <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token operator\">&amp;<\/span>b <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token operator\">&amp;<\/span>c <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token operator\">&amp;<\/span>d <span class=\"token operator\">&lt;&lt;<\/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><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260828094029-6a91578da1013.png\" alt=\"\u5f15\u7528\" \/><\/p>\n<h3>\u5f15\u7528\u7684\u7279\u6027<\/h3>\n<ul>\n<li>\u5f15\u2f64\u5728\u5b9a\u4e49\u65f6\u5fc5\u987b\u521d\u59cb\u5316<\/li>\n<li>\u2f00\u4e2a\u53d8\u91cf\u53ef\u4ee5\u6709\u591a\u4e2a\u5f15\u2f64<\/li>\n<li>\u5f15\u2f64\u2f00\u65e6\u5f15\u2f64\u2f00\u4e2a\u5b9e\u4f53&#xff0c;\u518d\u4e0d\u80fd\u5f15\u2f64\u5176\u4ed6\u5b9e\u4f53<\/li>\n<\/ul>\n<h3>\u5f15\u7528\u7684\u4f7f\u7528<\/h3>\n<ul>\n<li>\u5f15\u2f64\u5728\u5b9e\u8df5\u4e2d\u4e3b\u8981\u662f\u4e8e\u5f15\u2f64\u4f20\u53c2\u548c\u5f15\u2f64\u505a\u8fd4\u56de\u503c\u4e2d\u51cf\u5c11\u62f7\u2ec9\u63d0\u2fbc\u6548\u7387\u548c\u6539\u53d8\u5f15\u2f64\u5bf9\u8c61\u65f6\u540c\u65f6\u6539\u53d8\u88ab\u5f15\u2f64\u5bf9\u8c61<\/li>\n<li>\u5f15\u2f64\u4f20\u53c2\u8ddf\u6307\u9488\u4f20\u53c2\u529f\u80fd\u662f\u7c7b\u4f3c\u7684&#xff0c;\u5f15\u2f64\u4f20\u53c2\u76f8\u5bf9\u66f4\u2f45\u4fbf\u2f00\u4e9b<\/li>\n<li>\u5f15\u2f64\u548c\u6307\u9488\u5728\u5b9e\u8df5\u4e2d\u76f8\u8f85\u76f8\u6210&#xff0c;\u529f\u80fd\u6709\u91cd\u53e0\u6027&#xff0c;\u4f46\u662f\u5404\u6709\u7279\u70b9&#xff0c;\u4e92\u76f8\u4e0d\u53ef\u66ff\u4ee3\u3002C&#043;&#043;\u7684\u5f15\u2f64\u8ddf\u5176\u4ed6\u8bed\u2f94\u7684\u5f15\u2f64(\u5982Java)\u662f\u6709\u5f88\u2f24\u7684\u533a\u522b\u7684&#xff0c;\u9664\u4e86\u2f64\u6cd5\u6700\u2f24\u7684\u70b9&#xff0c;C&#043;&#043;\u5f15\u2f64\u5b9a\u4e49\u540e\u4e0d\u80fd\u6539\u53d8\u6307\u5411&#xff0c;Java\u7684\u5f15\u2f64\u53ef\u4ee5\u6539\u53d8\u6307\u5411<\/li>\n<\/ul>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">Swap<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&amp;<\/span> rx<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span><span class=\"token operator\">&amp;<\/span> ry<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">int<\/span> tmp <span class=\"token operator\">&#061;<\/span> rx<span class=\"token punctuation\">;<\/span><br \/>\nrx <span class=\"token operator\">&#061;<\/span> ry<span class=\"token punctuation\">;<\/span><br \/>\nry <span class=\"token operator\">&#061;<\/span> tmp<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<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 keyword\">int<\/span> x <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> y <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> x <span class=\"token operator\">&lt;&lt;<\/span><span class=\"token string\">&#034; &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> y <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">Swap<\/span><span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> x <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> y <span class=\"token operator\">&lt;&lt;<\/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>\u6211\u4eec\u90fd\u77e5\u9053\u5f62\u53c2\u662f\u5bf9\u5b9e\u53c2\u7684\u4e34\u65f6\u62f7\u8d1d&#xff0c;\u4f46\u662f\u4f7f\u7528\u4e86\u5f15\u7528\u5c31\u4e0d\u4f1a\u518d\u62f7\u8d1d\u4e86<\/p>\n<h3>const\u5f15\u7528<\/h3>\n<ul>\n<li>\u53ef\u4ee5\u5f15\u2f64\u2f00\u4e2aconst\u5bf9\u8c61&#xff0c;\u4f46\u662f\u5fc5\u987b\u2f64const\u5f15\u2f64\u3002const\u5f15\u2f64\u4e5f\u53ef\u4ee5\u5f15\u2f64\u666e\u901a\u5bf9\u8c61&#xff0c;\u56e0\u4e3a\u5bf9\u8c61\u7684\u8bbf\u95ee\u6743\u9650\u5728\u5f15\u2f64\u8fc7\u7a0b\u4e2d\u53ef\u4ee5\u7f29\u2f29&#xff0c;\u4f46\u662f\u4e0d\u80fd\u653e\u2f24<\/li>\n<li>\u4e0d\u9700\u8981\u6ce8\u610f\u7684\u662f\u7c7b\u4f3cint&amp; rb &#061; a*3; double d &#061; 12.34; int&amp; rd &#061; d; \u8fd9\u6837\u2f00\u4e9b\u573a\u666f\u4e0ba*3\u7684\u548c\u7ed3\u679c\u4fdd\u5b58\u5728\u2f00\u4e2a\u4e34\u65f6\u5bf9\u8c61\u4e2d&#xff0c;int&amp; rd &#061; d \u4e5f\u662f\u7c7b\u4f3c&#xff0c;\u5728\u7c7b\u578b\u8f6c\u6362\u4e2d\u4f1a\u4ea7\u2f63\u4e34\u65f6\u5bf9\u8c61\u5b58\u50a8\u4e2d\u95f4\u503c&#xff0c;\u4e5f\u5c31\u662f\u65f6&#xff0c;rb\u548crd\u5f15\u2f64\u7684\u90fd\u662f\u4e34\u65f6\u5bf9\u8c61&#xff0c;\u2f7dC&#043;&#043;\u89c4\u5b9a\u4e34\u65f6\u5bf9\u8c61\u5177\u6709\u5e38\u6027&#xff0c;\u6240\u4ee5\u8fd9\u2fa5\u5c31\u89e6\u53d1\u4e86\u6743\u9650\u653e\u2f24&#xff0c;\u5fc5\u987b\u8981\u2f64\u5e38\u5f15\u2f64\u624d\u53ef\u4ee5\u3002<\/li>\n<li>\u6240\u8c13\u4e34\u65f6\u5bf9\u8c61\u5c31\u662f\u7f16\u8bd1\u5668\u9700\u8981\u2f00\u4e2a\u7a7a\u95f4\u6682\u5b58\u8868\u8fbe\u5f0f\u7684\u6c42\u503c\u7ed3\u679c\u65f6\u4e34\u65f6\u521b\u5efa\u7684\u2f00\u4e2a\u672a\u547d\u540d\u7684\u5bf9\u8c61&#xff0c;C&#043;&#043;\u4e2d\u628a\u8fd9\u4e2a\u672a\u547d\u540d\u5bf9\u8c61\u53eb\u505a\u4e34\u65f6\u5bf9\u8c61<\/li>\n<\/ul>\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 keyword\">int<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">int<\/span><span class=\"token operator\">&amp;<\/span> ra <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">30<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u7f16\u8bd1\u62a5\u9519: \u201c\u521d\u59cb\u5316\u201d: \u2f46\u6cd5\u4ece\u201cint\u201d\u8f6c\u6362\u4e3a\u201cint &amp;\u201d <\/span><br \/>\n<span class=\"token comment\">\/\/ int&amp; rb &#061; a * 3;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">int<\/span><span class=\"token operator\">&amp;<\/span> rb <span class=\"token operator\">&#061;<\/span> a<span class=\"token operator\">*<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">double<\/span> d <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">12.34<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ int&amp; rd &#061; d;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u7f16\u8bd1\u62a5\u9519&#xff1a;\u201c\u521d\u59cb\u5316\u201d: \u2f46\u6cd5\u4ece\u201cdouble\u201d\u8f6c\u6362\u4e3a\u201cint &amp;\u201d <\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">int<\/span><span class=\"token operator\">&amp;<\/span> rd <span class=\"token operator\">&#061;<\/span> d<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<h3>\u6307\u9488\u548c\u5f15\u7528\u7684\u5173\u7cfb<\/h3>\n<p>C&#043;&#043;\u4e2d\u6307\u9488\u548c\u5f15\u2f64\u5c31\u50cf\u4e24\u4e2a\u6027\u683c\u8fe5\u5f02\u7684\u4eb2\u5144\u5f1f&#xff0c;\u6307\u9488\u662f\u54e5\u54e5&#xff0c;\u5f15\u2f64\u662f\u5f1f\u5f1f&#xff0c;\u5728\u5b9e\u8df5\u4e2d\u4ed6\u4eec\u76f8\u8f85\u76f8\u6210&#xff0c;\u529f\u80fd\u6709\u91cd\u53e0\u6027&#xff0c;\u4f46\u662f\u5404\u6709\u2f83\u2f30\u7684\u7279\u70b9&#xff0c;\u4e92\u76f8\u4e0d\u53ef\u66ff\u4ee3<\/p>\n<ul>\n<li>\u8bed\u6cd5\u6982\u5ff5\u4e0a\u5f15\u2f64\u662f\u2f00\u4e2a\u53d8\u91cf\u7684\u53d6\u522b\u540d\u4e0d\u5f00\u7a7a\u95f4&#xff0c;\u6307\u9488\u662f\u5b58\u50a8\u2f00\u4e2a\u53d8\u91cf\u5730\u5740&#xff0c;\u8981\u5f00\u7a7a\u95f4\u3002<\/li>\n<li>\u5f15\u2f64\u5728\u5b9a\u4e49\u65f6\u5fc5\u987b\u521d\u59cb\u5316&#xff0c;\u6307\u9488\u5efa\u8bae\u521d\u59cb\u5316&#xff0c;\u4f46\u662f\u8bed\u6cd5\u4e0a\u4e0d\u662f\u5fc5\u987b\u7684\u3002<\/li>\n<li>\u5f15\u2f64\u5728\u521d\u59cb\u5316\u65f6\u5f15\u2f64\u2f00\u4e2a\u5bf9\u8c61\u540e&#xff0c;\u5c31\u4e0d\u80fd\u518d\u5f15\u2f64\u5176\u4ed6\u5bf9\u8c61&#xff1b;\u2f7d\u6307\u9488\u53ef\u4ee5\u5728\u4e0d\u65ad\u5730\u6539\u53d8\u6307\u5411\u5bf9\u8c61\u3002<\/li>\n<li>\u5f15\u2f64\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u6307\u5411\u5bf9\u8c61&#xff0c;\u6307\u9488\u9700\u8981\u89e3\u5f15\u2f64\u624d\u662f\u8bbf\u95ee\u6307\u5411\u5bf9\u8c61\u3002<\/li>\n<li>sizeof\u4e2d\u542b\u4e49\u4e0d\u540c&#xff0c;\u5f15\u2f64\u7ed3\u679c\u4e3a\u5f15\u2f64\u7c7b\u578b\u7684\u2f24\u2f29&#xff0c;\u4f46\u6307\u9488\u59cb\u7ec8\u662f\u5730\u5740\u7a7a\u95f4\u6240\u5360\u5b57\u8282\u4e2a\u6570(32\u4f4d\u5e73\u53f0\u4e0b\u53604\u4e2a\u5b57\u8282&#xff0c;64\u4f4d\u4e0b\u662f8byte)<\/li>\n<li>\u6307\u9488\u5f88\u5bb9\u6613\u51fa\u73b0\u7a7a\u6307\u9488\u548c\u91ce\u6307\u9488\u7684\u95ee\u9898&#xff0c;\u5f15\u2f64\u5f88\u5c11\u51fa\u73b0&#xff0c;\u5f15\u2f64\u4f7f\u2f64\u8d77\u6765\u76f8\u5bf9\u66f4\u5b89\u5168\u2f00\u4e9b\u3002<\/li>\n<\/ul>\n<h2>\u5185\u8054inline<\/h2>\n<ul>\n<li>C\u8bed\u2f94\u5b9e\u73b0\u5b8f\u51fd\u6570\u4e5f\u4f1a\u5728\u9884\u5904\u7406\u65f6\u66ff\u6362\u5c55\u5f00&#xff0c;\u4f46\u662f\u5b8f\u51fd\u6570\u5b9e\u73b0\u5f88\u590d\u6742\u5f88\u5bb9\u6613\u51fa\u9519\u7684&#xff0c;\u4e14\u4e0d\u2f45\u4fbf\u8c03\u8bd5&#xff0c;C&#043;&#043;\u8bbe\u8ba1\u4e86inline\u2f6c\u7684\u5c31\u662f\u66ff\u4ee3C\u7684\u5b8f\u51fd\u6570\u3002<\/li>\n<li>inline\u5bf9\u4e8e\u7f16\u8bd1\u5668\u2f7d\u2f94\u53ea\u662f\u2f00\u4e2a\u5efa\u8bae&#xff0c;\u4e5f\u5c31\u662f\u8bf4&#xff0c;\u4f60\u52a0\u4e86inline\u7f16\u8bd1\u5668\u4e5f\u53ef\u4ee5\u9009\u62e9\u5728\u8c03\u2f64\u7684\u5730\u2f45\u4e0d\u5c55\u5f00&#xff0c;\u4e0d\u540c\u7f16\u8bd1\u5668\u5173\u4e8einline\u4ec0\u4e48\u60c5\u51b5\u5c55\u5f00\u5404\u4e0d\u76f8\u540c&#xff0c;\u56e0\u4e3aC&#043;&#043;\u6807\u51c6\u6ca1\u6709\u89c4\u5b9a\u8fd9\u4e2a\u3002inline\u9002\u2f64\u4e8e\u9891\u7e41\u8c03\u2f64\u7684\u77ed\u2f29\u51fd\u6570&#xff0c;\u5bf9\u4e8e\u9012\u5f52\u51fd\u6570&#xff0c;\u4ee3\u7801\u76f8\u5bf9\u591a\u2f00\u4e9b\u7684\u51fd\u6570&#xff0c;\u52a0\u4e0ainline\u4e5f\u4f1a\u88ab\u7f16\u8bd1\u5668\u5ffd\u7565\u3002<\/li>\n<\/ul>\n<p><span class=\"token comment\">\/\/ \u5b9e\u73b0\u2f00\u4e2aADD\u5b8f\u51fd\u6570\u7684\u5e38\u2ec5\u95ee\u9898<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">ADD<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>b<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><br \/>\n<span class=\"token comment\">\/\/inline\u5199\u6cd5<\/span><br \/>\n<span class=\"token keyword\">inline<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">Add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> y<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> x <span class=\"token operator\">&#043;<\/span> y<span class=\"token punctuation\">;<\/span><br \/>\nret <span class=\"token operator\">&#043;&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\nret <span class=\"token operator\">&#043;&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\nret <span class=\"token operator\">&#043;&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> ret<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>inline\u662f\u4e3a\u4e86\u66ff\u4ee3\u5b8f\u7684\u5417?<\/p>\n<p>\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u7ecf\u5178\u7684\u8bef\u89e3\u3002\u4e0d\u5b8c\u5168\u662f\u66f4\u51c6\u786e\u7684\u8bf4\u6cd5\u662f&#xff1a;C&#043;&#043;\u5f15\u5165inline\u51fd\u6570&#xff0c;\u786e\u5b9e\u662f\u4e3a\u4e86\u66ff\u4ee3\u201c\u51fd\u6570\u5f0f\u5b8f\u201d&#xff08;\u5e26\u53c2\u6570\u7684\u5b8f&#xff09;\u7684\u5927\u90e8\u5206\u4f7f\u7528\u573a\u666f&#xff0c;\u4f46\u5b83\u7edd\u5bf9\u65e0\u6cd5\u5b8c\u5168\u66ff\u4ee3\u5b8f\u3002<\/p>\n<p>\u8981\u7406\u89e3\u8fd9\u53e5\u8bdd&#xff0c;\u6211\u4eec\u53ef\u4ee5\u4ece\u4e09\u4e2a\u5c42\u9762\u6765\u770b&#xff1a;<\/p>\n<p>1. \u4e3a\u4ec0\u4e48\u8bf4\u201c\u662f\u4e3a\u4e86\u66ff\u4ee3\u5b8f\u201d&#xff1f;&#xff08;\u89e3\u51b3\u5b8f\u7684\u81f4\u547d\u7f3a\u9677&#xff09;<br \/>\n\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u4eba\u4eec\u5e38\u7528\u5b8f\u6765\u5b9a\u4e49\u201c\u4f2a\u51fd\u6570\u201d&#xff08;\u5982 #define SQUARE(x) ((x)*(x))&#xff09;\u4ee5\u907f\u514d\u51fd\u6570\u8c03\u7528\u5f00\u9500\u3002\u4f46\u5b8f\u6709\u4e09\u5927\u786c\u4f24&#xff1a;<\/p>\n<ul>\n<li>\u65e0\u7c7b\u578b\u68c0\u67e5&#xff1a;\u5b8f\u53ea\u662f\u6587\u672c\u66ff\u6362&#xff0c;\u4f20\u5165\u5b57\u7b26\u4e32\u6216\u5bf9\u8c61\u90fd\u53ef\u80fd\u7f16\u8bd1\u901a\u8fc7&#xff0c;\u4f46\u8fd0\u884c\u65f6\u5d29\u6e83\u3002<\/li>\n<li>\u526f\u4f5c\u7528\u707e\u96be&#xff1a;SQUARE(i&#043;&#043;) \u4f1a\u88ab\u5c55\u5f00\u4e3a ((i&#043;&#043;)*(i&#043;&#043;))&#xff0c;\u5bfc\u81f4\u672a\u5b9a\u4e49\u884c\u4e3a\u3002<\/li>\n<li>\u65e0\u6cd5\u8c03\u8bd5&#xff1a;\u5b8f\u5728\u9884\u5904\u7406\u9636\u6bb5\u5c31\u88ab\u5c55\u5f00&#xff0c;\u65ad\u70b9\u65e0\u6cd5\u5355\u6b65\u8ddf\u8e2a\u3002<\/li>\n<\/ul>\n<p>inline\u51fd\u6570\u7684\u8bde\u751f&#xff0c;\u6838\u5fc3\u76ee\u7684\u5c31\u662f\u89e3\u51b3\u8fd9\u4e09\u4e2a\u95ee\u9898\u3002\u5b83\u65e2\u4fdd\u7559\u4e86\u5b8f\u201c\u65e0\u8c03\u7528\u5f00\u9500\u201d\u7684\u6027\u80fd\u4f18\u52bf&#xff0c;\u53c8\u5177\u5907\u666e\u901a\u51fd\u6570\u7684\u6240\u6709\u7279\u6027&#xff08;\u7c7b\u578b\u5b89\u5168\u3001\u4f5c\u7528\u57df\u3001\u53ef\u8c03\u8bd5&#xff09;&#xff0c;\u4e14\u53c2\u6570\u53ea\u4f1a\u88ab\u6c42\u503c\u4e00\u6b21\u3002\u4ece\u8fd9\u4e2a\u89d2\u5ea6\u770b&#xff0c;\u5b83\u786e\u5b9e\u662f\u5b8f\u7684\u201c\u73b0\u4ee3\u66ff\u4ee3\u54c1\u201d\u3002<\/p>\n<p>2. \u4e3a\u4ec0\u4e48\u8bf4\u201c\u4e0d\u80fd\u5b8c\u5168\u66ff\u4ee3\u5b8f\u201d&#xff1f;&#xff08;\u5b8f\u7684\u4e0d\u53ef\u66ff\u4ee3\u6027&#xff09;<br \/>\n\u56e0\u4e3a\u5b8f\u662f\u5728\u9884\u5904\u7406\u9636\u6bb5\u8fdb\u884c\u7eaf\u7cb9\u7684\u6587\u672c\u66ff\u6362&#xff0c;\u800cinline\u662f\u7f16\u8bd1\u9636\u6bb5\u7684\u7c7b\u578b\u5b9e\u4f53\u3002\u5b8f\u80fd\u505a\u5230\u5f88\u591ainline\u6c38\u8fdc\u505a\u4e0d\u5230\u7684\u4e8b&#xff1a;<\/p>\n<ul>\n<li>\u6761\u4ef6\u7f16\u8bd1&#xff1a;\u5982 #ifdef DEBUG&#xff0c;\u8fd9\u662f\u63a7\u5236\u4ee3\u7801\u662f\u5426\u5b58\u5728\u7684\u903b\u8f91&#xff0c;inline\u51fd\u6570\u65e0\u6cd5\u5b9e\u73b0\u3002<\/li>\n<li>\u5b57\u7b26\u4e32\u5316&#xff08;#&#xff09;\u548c\u7c98\u8d34&#xff08;##&#xff09;&#xff1a;\u5982 #define STR(x) #x \u53ef\u5c06\u53d8\u91cf\u540d\u8f6c\u4e3a\u5b57\u7b26\u4e32&#xff0c;\u8fd9\u79cd\u5143\u7f16\u7a0b\u80fd\u529binline\u4e0d\u5177\u5907\u3002<\/li>\n<li>\u6cdb\u578b\u4ee3\u7801\u751f\u6210&#xff1a;\u5728C&#043;&#043;\u6a21\u677f\u548c\u91cd\u8f7d\u4e0d\u5b8c\u5584\u7684\u65f6\u4ee3&#xff0c;\u5b8f\u53ef\u4ee5\u7528\u6765\u201c\u751f\u6210\u201d\u4e0d\u540c\u6570\u636e\u7c7b\u578b\u7684\u76f8\u4f3c\u4ee3\u7801&#xff08;\u867d\u7136\u73b0\u5728\u66f4\u63a8\u8350\u7528\u6a21\u677f&#xff09;\u3002<\/li>\n<\/ul>\n<p>3. \u73b0\u4ee3C&#043;&#043;\u7684\u6f14\u53d8&#xff08;inline\u7684\u804c\u8d23\u53d8\u4e86&#xff09;<br \/>\n\u5176\u5b9e\u5728\u4eca\u5929&#xff0c;\u201c\u51cf\u5c11\u51fd\u6570\u8c03\u7528\u5f00\u9500\u201d\u5df2\u7ecf\u4e0d\u518d\u662finline\u7684\u4e3b\u8981\u7528\u9014\u3002\u73b0\u4ee3\u7f16\u8bd1\u5668\u6bd4\u4eba\u806a\u660e\u5f97\u591a&#xff0c;\u5b83\u5b8c\u5168\u65e0\u89c6inline\u5173\u952e\u5b57&#xff0c;\u81ea\u5df1\u51b3\u5b9a\u662f\u5426\u5185\u8054\u5c55\u5f00\u3002<\/p>\n<p>\u73b0\u5728inline\u7684\u552f\u4e00\u5f3a\u5236\u6027\u8bed\u4e49\u662f&#xff1a;\u5141\u8bb8\u51fd\u6570\u5728\u591a\u4e2a\u7f16\u8bd1\u5355\u5143\u4e2d\u5b9a\u4e49\u800c\u4e0d\u62a5\u94fe\u63a5\u9519\u8bef&#xff08;\u89e3\u51b3ODR&#xff0c;\u5373\u5355\u4e00\u5b9a\u4e49\u89c4\u5219&#xff09;\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u5728\u5934\u6587\u4ef6\u4e2d\u5b9a\u4e49\u7c7b\u6210\u5458\u51fd\u6570\u6216\u6a21\u677f\u51fd\u6570\u65f6&#xff0c;\u9700\u8981\u52a0inline\u3002<\/p>\n<hr \/>\n<p>\u603b\u7ed3\u5efa\u8bae&#xff1a;<\/p>\n<ul>\n<li>\u5982\u679c\u4f60\u662f\u4e3a\u4e86\u66ff\u4ee3\u5e26\u53c2\u6570\u7684\u590d\u6742\u5b8f&#xff0c;\u8bf7\u4f7f\u7528 inline \u51fd\u6570&#xff08;\u6216C&#043;&#043;17\u7684 constexpr \u51fd\u6570&#xff09;\u3002<\/li>\n<li>\u5982\u679c\u4f60\u662f\u4e3a\u4e86\u6761\u4ef6\u7f16\u8bd1&#xff08;\u5982\u8de8\u5e73\u53f0\u4ee3\u7801&#xff09;\u6216\u751f\u6210\u72ec\u7279\u7684\u6807\u8bc6\u7b26&#xff0c;\u8bf7\u7ee7\u7eed\u4f7f\u7528 #define \u5b8f\u3002<\/li>\n<\/ul>\n<p>\u7ed9\u65b0\u624b\u7684\u6838\u5fc3\u539f\u5219&#xff1a;\u5728C&#043;&#043;\u4e2d&#xff0c;\u6c38\u8fdc\u4e0d\u8981\u7528\u5b8f\u6765\u5199\u51fd\u6570\u903b\u8f91&#xff0c;\u7528 inline \u6216\u6a21\u677f&#xff1b;\u53ea\u7528\u5b8f\u505a\u9884\u5904\u7406\u63a7\u5236&#xff08;\u5934\u6587\u4ef6\u5b88\u536b\u3001\u65e5\u5fd7\u5f00\u5173\u3001\u5e73\u53f0\u5224\u65ad&#xff09;\u3002<\/p>\n<h2>nullptr\u7a7a\u6307\u9488<\/h2>\n<p>NULL\u5b9e\u9645\u662f\u2f00\u4e2a\u5b8f&#xff0c;\u5728\u4f20\u7edf\u7684C\u5934\u2f42\u4ef6(stddef.h)\u4e2d&#xff0c;\u53ef\u4ee5\u770b\u5230\u5982\u4e0b\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">ifndef<\/span> <span class=\"token expression\"><span class=\"token constant\">NULL<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">ifdef<\/span> <span class=\"token expression\">__cplusplus<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive 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