{"id":44824,"date":"2025-06-21T06:05:32","date_gmt":"2025-06-20T22:05:32","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/44824.html"},"modified":"2025-06-21T06:05:32","modified_gmt":"2025-06-20T22:05:32","slug":"%e3%80%90c-%e5%a4%9a%e6%80%81%e3%80%91-%e7%a4%bc%e5%99%a8%e4%b9%9d%e9%bc%8e%ef%bc%8c%e9%87%89%e4%b8%8b%e4%b9%be%e5%9d%a4%ef%bc%8c%e5%a4%9a%e6%80%81%e4%b8%ad%e7%9a%84","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/44824.html","title":{"rendered":"\u3010C++ \u591a\u6001\u3011\u2014\u2014 \u793c\u5668\u4e5d\u9f0e\uff0c\u91c9\u4e0b\u4e7e\u5764\uff0c\u591a\u6001\u4e2d\u7684 \u201c\u98ce\u6c34\u5bfb\u9f99\u8bc0\u201c"},"content":{"rendered":"<p>\u6b22\u8fce\u6765\u5230\u4e00\u6574\u9897\u7ea2\u8c46\u7684\u535a\u5ba2\u2728&#xff0c;\u4e00\u4e2a\u5173\u4e8e\u63a2\u7d22\u6280\u672f\u7684\u89d2\u843d&#xff0c;\u8bb0\u5f55\u5b66\u4e60\u7684\u70b9\u6ef4&#x1f4d6;&#xff0c;\u5206\u4eab\u5b9e\u7528\u7684\u6280\u5de7&#x1f6e0;\ufe0f&#xff0c;\u5076\u5c14\u8fd8\u6709\u4e00\u4e9b\u5947\u601d\u5999\u60f3&#x1f4a1; \u672c\u6587\u7531\u4e00\u6574\u9897\u7ea2\u8c46\u539f\u521b\u270d\ufe0f&#xff0c;\u611f\u8c22\u652f\u6301\u2764\ufe0f&#xff01;\u8bf7\u5c0a\u91cd\u539f\u521b&#x1f4e9;&#xff01;\u6b22\u8fce\u8bc4\u8bba\u533a\u7559\u8a00\u4ea4\u6d41&#x1f31f; \u4e2a\u4eba\u4e3b\u9875 &#x1f449; \u4e00\u6574\u9897\u7ea2\u8c46 \u672c\u6587\u4e13\u680f \u27a1\ufe0fC&#043;&#043; \u8fdb\u9636\u4e4b\u8def<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250620220530-6855db2a50a6f.gif\" alt=\"\u8bf7\u6dfb\u52a0\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<\/p>\n<h4>\u793c\u5668\u4e5d\u9f0e&#xff0c;\u91c9\u4e0b\u4e7e\u5764&#xff0c;\u591a\u6001\u4e2d\u7684 &#034;\u98ce\u6c34\u5bfb\u9f99\u8bc0&#034; <\/h4>\n<ul>\n<li>\u591a\u6001\u7684\u6982\u5ff5<\/li>\n<li>\n<ul>\n<li>\u7f16\u8bd1\u65f6\u591a\u6001&#xff08;\u9759\u6001\u591a\u6001&#xff09;<\/li>\n<li>\n<ul>\n<li>&#096;\u7f16\u8bd1\u65f6\u591a\u6001\u7684\u5b9e\u73b0\u65b9\u5f0f\u6709&#xff0c;\u51fd\u6570\u91cd\u8f7d&#xff0c;\u8fd0\u7b97\u7b26\u91cd\u8f7d\u548c\u6a21\u677f\u3002&#096;<\/li>\n<li>\u51fd\u6570\u91cd\u8f7d &#096;Function Overloading&#096;<\/li>\n<li>\u8fd0\u7b97\u7b26\u91cd\u8f7d&#xff08;&#096;Operator Overloading&#096;&#xff09;<\/li>\n<li>\u6a21\u677f&#xff08;&#096;Templates&#096;&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>\u7f16\u8bd1\u65f6\u591a\u6001\u7684\u7279\u70b9<\/li>\n<li>\n<ul>\n<li>\u9759\u6001\u7ed1\u5b9a&#xff08;&#096;Static Binding&#096;&#xff09;<\/li>\n<li>\u7c7b\u578b\u5b89\u5168&#xff08;&#096;Type Safety&#096;&#xff09;<\/li>\n<li>\u65e0\u8fd0\u884c\u65f6\u5f00\u9500<\/li>\n<li>\u4ee3\u7801\u81a8\u80c0&#xff08;&#096;Code bloat&#096;&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd0\u884c\u65f6\u591a\u6001&#xff08;\u52a8\u6001\u591a\u6001&#xff09;<\/li>\n<li>\n<ul>\n<li>\u8ba4\u8bc6\u865a\u51fd\u6570&#xff08;&#096;Virtual function&#096;&#xff09;<\/li>\n<li>\u865a\u51fd\u6570\u7684\u91cd\u5199\/\u8986\u76d6&#xff08;&#096;override&#096;\u548c&#096;final&#096;&#xff09;<\/li>\n<li>\u7eaf\u865a\u51fd\u6570&#xff08;&#096;Pure Virtual Function&#096;&#xff09;\u548c\u62bd\u8c61\u7c7b<\/li>\n<li>\u865a\u6790\u6784\u51fd\u6570&#xff08;&#096;Virtual Destructor&#096;&#xff09;<\/li>\n<li>\u534f\u53d8&#xff08;&#096;Covariant Return Types&#096;&#xff09;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u91cd\u8f7d&#xff08;&#096;Overload&#096;&#xff09;\u3001\u91cd\u5199&#xff08;&#096;Override&#096;&#xff09;\u3001\u9690\u85cf&#xff08;&#096;Hide&#096;&#xff09;\u7684\u5bf9\u6bd4<\/li>\n<li>\n<ul>\n<li>\u91cd\u8f7d&#xff08;&#096;Overload&#096;&#xff09;<\/li>\n<li>\u91cd\u5199&#xff08;&#096;Override&#096;&#xff09;<\/li>\n<li>\u9690\u85cf&#xff08;&#096;Hide&#096;&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>\u591a\u6001\u7684\u539f\u7406<\/li>\n<li>\n<ul>\n<li>\u865a\u51fd\u6570\u8868&#xff08;&#096;vtable&#096;&#xff09;<\/li>\n<li>\n<ul>\n<li>\u865a\u51fd\u6570\u8868\u7684\u6982\u5ff5<\/li>\n<li>\u865a\u51fd\u6570\u8868\u7684\u751f\u6210\u89c4\u5219<\/li>\n<\/ul>\n<\/li>\n<li>\u591a\u6001\u662f\u5982\u4f55\u5b9e\u73b0\u7684<\/li>\n<li>\n<ul>\n<li>\u52a8\u6001\u7ed1\u5b9a\u548c\u9759\u6001\u7ed1\u5b9a<\/li>\n<\/ul>\n<\/li>\n<li>\u865a\u51fd\u6570\u8868\u7684\u4f4d\u7f6e<\/li>\n<\/ul>\n<\/li>\n<li>\u603b\u7ed3\u591a\u6001\u8c03\u7528<\/li>\n<li>\u5199\u5728\u6700\u540e<\/li>\n<\/ul>\n<h2>\u591a\u6001\u7684\u6982\u5ff5<\/h2>\n<p>\u4f17\u6240\u5468\u77e5&#xff0c;\u9762\u5411\u5bf9\u8c61\u6709\u4e09\u5927\u7279\u6027&#xff0c;\u5c01\u88c5\u3001\u7ee7\u627f\u548c\u591a\u6001&#xff01;<\/p>\n<p>\u591a\u6001&#xff08;Polymorphism&#xff09; \u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u6838\u5fc3\u7279\u6027&#xff0c;\u5141\u8bb8\u7528\u7edf\u4e00\u7684\u63a5\u53e3\u64cd\u4f5c\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61&#xff0c;\u5e76\u6839\u636e\u5bf9\u8c61\u5b9e\u9645\u7c7b\u578b\u6267\u884c\u4e0d\u540c\u7684\u884c\u4e3a\u3002C&#043;&#043;\u4e2d\u7684\u591a\u6001\u5206\u4e3a\u7f16\u8bd1\u65f6\u591a\u6001\u548c\u8fd0\u884c\u65f6\u591a\u6001\u3002<\/p>\n<h3>\u7f16\u8bd1\u65f6\u591a\u6001&#xff08;\u9759\u6001\u591a\u6001&#xff09;<\/h3>\n<p>\u7f16\u8bd1\u65f6\u591a\u6001&#xff08;Compile-Time Polymorphism&#xff09; \u53c8\u79f0\u4e3a \u9759\u6001\u591a\u6001&#xff0c;\u662f\u4e00\u79cd\u5728 \u4ee3\u7801\u7f16\u8bd1\u9636\u6bb5\u5c31\u80fd\u786e\u5b9a\u5177\u4f53\u8c03\u7528\u884c\u4e3a\u7684\u673a\u5236\u3002\u5b83\u7684\u6838\u5fc3\u7279\u70b9\u662f \u57fa\u4e8e\u9759\u6001\u7c7b\u578b\u7cfb\u7edf&#xff0c;\u901a\u8fc7\u4ee3\u7801\u7ed3\u6784\u76f4\u63a5\u51b3\u5b9a\u8c03\u7528\u54ea\u4e2a\u51fd\u6570\u6216\u64cd\u4f5c&#xff0c;\u65e0\u9700\u8fd0\u884c\u65f6\u52a8\u6001\u67e5\u627e\u3002<\/p>\n<h4>\u7f16\u8bd1\u65f6\u591a\u6001\u7684\u5b9e\u73b0\u65b9\u5f0f\u6709&#xff0c;\u51fd\u6570\u91cd\u8f7d&#xff0c;\u8fd0\u7b97\u7b26\u91cd\u8f7d\u548c\u6a21\u677f\u3002<\/h4>\n<hr \/>\n<h4>\u51fd\u6570\u91cd\u8f7d Function Overloading<\/h4>\n<ul>\n<li>\u901a\u8fc7 \u53c2\u6570\u5217\u8868\u4e0d\u540c&#xff08;\u7c7b\u578b\/\u6570\u91cf\/\u987a\u5e8f&#xff09;\u5b9a\u4e49\u540c\u540d\u51fd\u6570<\/li>\n<\/ul>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;int: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> x <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 punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">double<\/span> x<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;double: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> x <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 punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>s<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;const char *: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> s <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 punctuation\">}<\/span><\/p>\n<p>\u8c03\u7528\u7b56\u7565&#xff1a;<\/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\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>      <span class=\"token comment\">\/\/ \u8c03\u7528 print(int)<\/span><br \/>\n    <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3.14<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u8c03\u7528 print(double)<\/span><br \/>\n    <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Hello&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8c03\u7528 print(const char*)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f93\u51fa&#xff1a;<\/p>\n<p>int: <span class=\"token number\">10<\/span><br \/>\ndouble: <span class=\"token number\">3.14<\/span><br \/>\nconst char *: Hello<\/p>\n<p>\u6709\u5173\u51fd\u6570\u91cd\u8f7d\u7684\u539f\u7406\u53ca\u5e94\u7528\u4e0d\u518d\u8fc7\u591a\u8bf4\u660e&#xff0c;\u8be6\u89c1\u535a\u6587 &#x1f449; C&#043;&#043;\u51fd\u6570\u91cd\u8f7d<\/p>\n<hr \/>\n<h4>\u8fd0\u7b97\u7b26\u91cd\u8f7d&#xff08;Operator Overloading&#xff09;<\/h4>\n<ul>\n<li>\u539f\u7406&#xff1a;\u4e3a\u81ea\u5b9a\u4e49\u7c7b\u578b\u91cd\u5b9a\u4e49\u8fd0\u7b97\u7b26\u884c\u4e3a<\/li>\n<\/ul>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Complex<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">double<\/span> real<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">double<\/span> imag<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token function\">Complex<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">double<\/span> r <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">double<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">:<\/span> <span class=\"token function\">real<\/span><span class=\"token punctuation\">(<\/span>r<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">imag<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u91cd\u8f7d &#043; \u8fd0\u7b97\u7b26<\/span><br \/>\n    Complex <span class=\"token keyword\">operator<\/span><span class=\"token operator\">&#043;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> Complex <span class=\"token operator\">&amp;<\/span>other<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token function\">Complex<\/span><span class=\"token punctuation\">(<\/span>real <span class=\"token operator\">&#043;<\/span> other<span class=\"token punctuation\">.<\/span>real<span class=\"token punctuation\">,<\/span> imag <span class=\"token operator\">&#043;<\/span> other<span class=\"token punctuation\">.<\/span>imag<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> real <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; &#043; &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> imag <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;i&#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 punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8c03\u7528\u7b56\u7565&#xff1a;<\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u8fd0\u7b97\u7b26\u91cd\u8f7d\u8c03\u7528<\/span><br \/>\n    Complex <span class=\"token function\">c1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    Complex <span class=\"token function\">c2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    Complex c3 <span class=\"token operator\">&#061;<\/span> c1 <span class=\"token operator\">&#043;<\/span> c2<span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Complex addition: &#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    c3<span class=\"token punctuation\">.<\/span><span class=\"token function\">print<\/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>\u8f93\u51fa&#xff1a;<\/p>\n<p>Complex addition: <span class=\"token number\">4<\/span> &#043; 6i<\/p>\n<p>\u540c\u6837\u6709\u5173\u8fd0\u7b97\u7b26\u91cd\u8f7d\u7684\u77e5\u8bc6\u8fd9\u91cc\u4e5f\u4e0d\u518d\u8fc7\u591a\u8bb2\u89e3&#xff0c;\u5728\u7c7b\u548c\u5bf9\u8c61\u4e2d\u5df2\u7ecf\u8bb2\u7684\u5f88\u8be6\u7ec6\u4e86&#xff0c;\u5fd8\u4e86\u5c31\u5feb\u53bb\u590d\u4e60\u4e00\u4e0b\u5427&#xff01;&#xff01; &#x1f449; C&#043;&#043; \u7c7b\u548c\u5bf9\u8c61 \u8fdb\u9636\u7bc7<\/p>\n<hr \/>\n<h4>\u6a21\u677f&#xff08;Templates&#xff09;<\/h4>\n<ul>\n<li>\u539f\u7406&#xff1a;\u901a\u8fc7\u6cdb\u578b\u7f16\u7a0b\u751f\u6210\u7c7b\u578b\u7279\u5316\u4ee3\u7801<\/li>\n<\/ul>\n<p>\u51fd\u6570\u6a21\u677f\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">template<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">typename<\/span> <span class=\"token class-name\">T<\/span><span class=\"token operator\">&gt;<\/span><br \/>\nT <span class=\"token function\">Max<\/span><span class=\"token punctuation\">(<\/span>T a<span class=\"token punctuation\">,<\/span> T b<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span>a <span class=\"token operator\">&gt;<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">?<\/span> a <span class=\"token operator\">:<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8c03\u7528\u7b56\u7565&#xff1a;<\/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    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token function\">Max<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span>      <span class=\"token comment\">\/\/ \u751f\u6210 int \u7248\u672c<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token function\">Max<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2.7<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3.14<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u751f\u6210 double \u7248\u672c<\/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&#xff1a;<\/p>\n<p><span class=\"token number\">5<\/span><br \/>\n<span class=\"token number\">3.14<\/span><\/p>\n<p>\u6709\u5173\u51fd\u6570\u6a21\u677f\u66f4\u6df1\u5165\u7684\u8bb2\u89e3&#xff0c;\u8bf7\u53c2\u8003\u535a\u6587&#x1f449; C&#043;&#043; \u51fd\u6570\u6a21\u677f<\/p>\n<hr \/>\n<p>\u7c7b\u6a21\u677f\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">template<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">typename<\/span> <span class=\"token class-name\">T<\/span><span class=\"token operator\">&gt;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Stack<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">push<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> T <span class=\"token operator\">&amp;<\/span>item<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> _elements<span class=\"token punctuation\">.<\/span><span class=\"token function\">push_back<\/span><span class=\"token punctuation\">(<\/span>item<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    T <span class=\"token function\">pop<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>vector<span class=\"token operator\">&lt;<\/span>T<span class=\"token operator\">&gt;<\/span> _elements<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8c03\u7528\u7b56\u7565&#xff1a;<\/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    Stack<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span> int_Stack<span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u5b58\u50a8\u6574\u6570\u7684\u6808<\/span><br \/>\n    Stack<span class=\"token operator\">&lt;<\/span>string<span class=\"token operator\">&gt;<\/span> str_Stack<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5b58\u50a8\u5b57\u7b26\u4e32\u7684\u6808<\/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<hr \/>\n<h3>\u7f16\u8bd1\u65f6\u591a\u6001\u7684\u7279\u70b9<\/h3>\n<h4>\u9759\u6001\u7ed1\u5b9a&#xff08;Static Binding&#xff09;<\/h4>\n<ul>\n<li>\u5b9a\u4e49&#xff1a;\u51fd\u6570\u8c03\u7528\u5728\u7f16\u8bd1\u9636\u6bb5\u786e\u5b9a&#xff0c;\u7f16\u8bd1\u5668\u6839\u636e\u8c03\u7528\u65f6\u7684 \u9759\u6001\u7c7b\u578b \u76f4\u63a5\u7ed1\u5b9a\u5230\u5177\u4f53\u5b9e\u73b0\u3002<\/li>\n<\/ul>\n<p>\u539f\u7406&#xff1a;<\/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> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> b<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>          <span class=\"token comment\">\/\/ \u51fd\u6570A<\/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> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">double<\/span> b<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u51fd\u6570B<\/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 function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u7f16\u8bd1\u65f6\u76f4\u63a5\u7ed1\u5b9a\u5230\u51fd\u6570A<\/span><br \/>\n    <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3.0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5.0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u7f16\u8bd1\u65f6\u76f4\u63a5\u7ed1\u5b9a\u5230\u51fd\u6570B<\/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<ul>\n<li>\u7f16\u8bd1\u5668\u901a\u8fc7\u51fd\u6570\u7b7e\u540d&#xff08;\u51fd\u6570\u540d &#043; \u53c2\u6570\u7c7b\u578b&#xff09;\u5339\u914d\u6700\u4f73\u5019\u9009<\/li>\n<li>\u751f\u6210\u7684\u76ee\u6807\u4ee3\u7801\u4e2d\u76f4\u63a5\u5199\u5165\u51fd\u6570\u5730\u5740&#xff0c;\u65e0\u8fd0\u884c\u65f6\u51b3\u7b56<\/li>\n<\/ul>\n<p>\u4e0b\u9762\u662f\u9759\u6001\u7ed1\u5b9a\u548c\u52a8\u6001\u7ed1\u5b9a (\u540e\u9762\u8981\u8bb2\u7684\u865a\u51fd\u6570\u7684\u539f\u7406) \u7684\u533a\u522b<\/p>\n<table>\n<tr>\u7279\u6027\u9759\u6001\u7ed1\u5b9a\u52a8\u6001\u7ed1\u5b9a&#xff08;\u865a\u51fd\u6570&#xff09;<\/tr>\n<tbody>\n<tr>\n<td>\u51b3\u7b56\u65f6\u673a<\/td>\n<td>\u7f16\u8bd1\u65f6<\/td>\n<td>\u8fd0\u884c\u65f6<\/td>\n<\/tr>\n<tr>\n<td>\u6027\u80fd\u5f00\u9500<\/td>\n<td>\u65e0\u989d\u5916\u5f00\u9500<\/td>\n<td>\u865a\u8868\u67e5\u627e&#xff08;1~2 \u6b21\u6307\u9488\u8df3\u8f6c&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u7075\u6d3b\u6027<\/td>\n<td>\u56fa\u5b9a<\/td>\n<td>\u53ef\u52a8\u6001\u5207\u6362<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h4>\u7c7b\u578b\u5b89\u5168&#xff08;Type Safety&#xff09;<\/h4>\n<p>\u6a21\u677f\u7c7b\u578b\u63a8\u5bfc&#xff1a;<\/p>\n<p><span class=\"token keyword\">template<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">typename<\/span> <span class=\"token class-name\">T<\/span><span class=\"token operator\">&gt;<\/span><br \/>\nT <span class=\"token function\">Max<\/span><span class=\"token punctuation\">(<\/span>T a<span class=\"token punctuation\">,<\/span> T b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span>a <span class=\"token operator\">&gt;<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">?<\/span> a <span class=\"token operator\">:<\/span> b<span class=\"token punctuation\">;<\/span> <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\">Max<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5.0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u7f16\u8bd1\u51fa\u9519&#xff1a;T \u540c\u65f6\u63a8\u5bfc\u4e3a int \u548c double&#xff0c;\u7c7b\u578b\u4e0d\u4e00\u81f4<\/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<ul>\n<li>\u7f16\u8bd1\u51fa\u9519&#xff1a;double\u548cint\u7c7b\u578b\u4e0d\u4e00\u81f4&#xff0c;\u6a21\u677f\u65e0\u6cd5\u6b63\u786e\u63a8\u5bfc<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250620220530-6855db2a652bb.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<ul>\n<li>\u7f16\u8bd1\u5668\u4e25\u683c\u68c0\u67e5\u6a21\u677f\u53c2\u6570\u7c7b\u578b\u4e00\u81f4\u6027<\/li>\n<li>\u907f\u514d\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362\u5bfc\u81f4\u7684\u610f\u5916\u884c\u4e3a<\/li>\n<\/ul>\n<p>\u9519\u8bef\u68c0\u6d4b\u65f6\u673a&#xff1a;<\/p>\n<p>std<span class=\"token double-colon punctuation\">::<\/span>vector<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span> v<span class=\"token punctuation\">;<\/span><br \/>\nv<span class=\"token punctuation\">.<\/span><span class=\"token function\">push_back<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Hello,World&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u7f16\u8bd1\u9519\u8bef&#xff1a;\u53c2\u6570\u7c7b\u578b\u4e0d\u5339\u914d<\/span><\/p>\n<p>\u9759\u6001\u591a\u6001&#xff0c;\u53c8\u53eb\u505a \u7f16\u8bd1\u65f6\u591a\u6001&#xff0c;\u663e\u800c\u6613\u89c1\u5728\u7f16\u8bd1\u5668\u8fdb\u884c\u7f16\u8bd1\u65f6&#xff0c;\u5c31\u4f1a\u5bf9\u591a\u6001\u7684\u6b63\u786e\u6027\u8fdb\u884c\u68c0\u6d4b&#xff0c;\u5982\u679c\u53d1\u73b0\u6709\u9519\u8bef&#xff0c;\u5219\u65e0\u6cd5\u7f16\u8bd1\u901a\u8fc7&#xff0c;\u6240\u4ee5\u662f\u7c7b\u578b\u5b89\u5168\u7684&#xff0c;\u8fd9\u4e5f\u662f\u5176\u4f18\u70b9\u4e4b\u4e00<\/p>\n<hr \/>\n<h4>\u65e0\u8fd0\u884c\u65f6\u5f00\u9500<\/h4>\n<p>\u4ee3\u7801\u76f4\u63a5\u751f\u6210<\/p>\n<p><span class=\"token comment\">\/\/ \u6a21\u677f\u51fd\u6570<\/span><br \/>\n<span class=\"token keyword\">template<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">typename<\/span> <span class=\"token class-name\">T<\/span><span class=\"token operator\">&gt;<\/span><br \/>\nT <span class=\"token function\">square<\/span><span class=\"token punctuation\">(<\/span>T x<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> x <span class=\"token operator\">*<\/span> x<span class=\"token punctuation\">;<\/span> <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\">square<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u751f\u6210 int square(int x) { return x*x; }<\/span><br \/>\n    <span class=\"token function\">square<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3.14<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u751f\u6210 double square(double x) { return x*x; }<\/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<ul>\n<li>\u6bcf\u4e2a\u7c7b\u578b\u7279\u5316\u751f\u6210\u72ec\u7acb\u7684\u673a\u5668\u4ee3\u7801<\/li>\n<li>\u8c03\u7528\u65f6\u76f4\u63a5\u8df3\u8f6c\u5230\u5177\u4f53\u51fd\u6570&#xff0c;\u65e0\u95f4\u63a5\u5bfb\u5740&#xff0c;\u63d0\u9ad8\u8fd0\u884c\u6548\u7387<\/li>\n<\/ul>\n<hr \/>\n<p>\u4ee5\u4e0a\u90fd\u662f\u7f16\u8bd1\u65f6\u591a\u6001\u7684\u4f18\u70b9&#xff0c;\u5176\u5b9e\u7f16\u8bd1\u65f6\u591a\u6001\u4e5f\u6709\u7f3a\u70b9&#xff0c;\u5c31\u662f\u4f1a\u5bfc\u81f4\u4ee3\u7801\u81a8\u80c0&#xff0c;\u4e8c\u8fdb\u5236\u6587\u4ef6\u7684\u4f53\u79ef\u8fc7\u5927&#xff01;<\/p>\n<h4>\u4ee3\u7801\u81a8\u80c0&#xff08;Code bloat&#xff09;<\/h4>\n<p>\u6a21\u677f\u5b9e\u4f8b\u5316\u673a\u5236&#xff1a;<\/p>\n<p><span class=\"token keyword\">template<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">typename<\/span> <span class=\"token class-name\">T<\/span><span class=\"token operator\">&gt;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Wrapper<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    T data<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/*&#8230;*\/<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><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    Wrapper<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span> w1<span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u751f\u6210 int \u7279\u5316\u7248\u672c<\/span><br \/>\n    Wrapper<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">double<\/span><span class=\"token operator\">&gt;<\/span> w2<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u751f\u6210 double \u7279\u5316\u7248\u672c<\/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<ul>\n<li>\u6bcf\u4e2a\u4e0d\u540c\u7c7b\u578b\u53c2\u6570\u751f\u6210\u5b8c\u5168\u72ec\u7acb\u7684\u4e8c\u8fdb\u5236\u4ee3\u7801<\/li>\n<li>\u53ef\u80fd\u5bfc\u81f4\u53ef\u6267\u884c\u6587\u4ef6\u4f53\u79ef\u663e\u8457\u589e\u5927<\/li>\n<\/ul>\n<p>\u51e1\u4e8b\u90fd\u6709\u4e24\u9762\u6027&#xff0c;\u76f4\u63a5\u751f\u6210\u4ee3\u7801&#xff0c;\u907f\u514d\u4e86\u95f4\u63a5\u5bfb\u5740\u5e26\u6765\u7684\u6027\u80fd\u635f\u8017&#xff0c;\u65e0\u8fd0\u884c\u65f6\u5f00\u9500&#xff0c;\u63d0\u9ad8\u4e86\u6548\u7387&#xff0c;\u4f46\u540c\u65f6\u4e5f\u751f\u6210\u591a\u79cd\u4e0d\u540c\u7248\u672c\u7684\u4e8c\u8fdb\u5236\u4ee3\u7801&#xff0c;\u4ee3\u7801\u81a8\u80c0&#xff0c;\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u94fe\u63a5\u540e\u751f\u6210\u7684\u53ef\u6267\u884c\u6587\u4ef6\u4f53\u79ef\u589e\u5927&#xff01;<\/p>\n<hr \/>\n<h3>\u8fd0\u884c\u65f6\u591a\u6001&#xff08;\u52a8\u6001\u591a\u6001&#xff09;<\/h3>\n<p>\u8981\u7406\u89e3\u8fd0\u884c\u65f6\u591a\u6001&#xff0c;\u9996\u5148\u8981\u77e5\u9053\u865a\u51fd\u6570\u7684\u6982\u5ff5&#xff0c;\u56e0\u4e3aC&#043;&#043;\u591a\u6001\u7684\u6838\u5fc3\u673a\u5236\u5c31\u662f\u6d3e\u751f\u7c7b\u5bf9\u57fa\u7c7b\u865a\u51fd\u6570\u7684\u91cd\u5199\u3002<\/p>\n<h4>\u8ba4\u8bc6\u865a\u51fd\u6570&#xff08;Virtual function&#xff09;<\/h4>\n<p>\u865a\u51fd\u6570&#xff08;Virtual Function&#xff09; \u662f\u5b9e\u73b0 \u8fd0\u884c\u65f6\u591a\u6001&#xff08;\u52a8\u6001\u591a\u6001&#xff09; \u7684\u6838\u5fc3\u673a\u5236\u3002\u5b83\u5141\u8bb8\u901a\u8fc7\u57fa\u7c7b\u6307\u9488\u6216\u5f15\u7528\u8c03\u7528\u6d3e\u751f\u7c7b\u7684\u91cd\u5199\u51fd\u6570&#xff0c;\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u5b9e\u73b0\u201c\u4e00\u4e2a\u63a5\u53e3&#xff0c;\u591a\u79cd\u5b9e\u73b0\u201d\u7684\u5173\u952e\u5de5\u5177\u3002<\/p>\n<p>\u865a\u51fd\u6570\u7684\u6982\u5ff5&#xff1a;<\/p>\n<ul>\n<li>\u865a\u51fd\u6570 \u662f\u7528 virtual \u5173\u952e\u5b57\u58f0\u660e\u7684\u6210\u5458\u51fd\u6570&#xff0c;\u7528\u4e8e\u5b9e\u73b0 \u8fd0\u884c\u65f6\u591a\u6001\u3002<\/li>\n<li>\u7c7b\u6210\u5458\u51fd\u6570\u524d\u9762\u52a0 virtual \u4fee\u9970&#xff0c;\u90a3\u4e48\u8fd9\u4e2a\u6210\u5458\u51fd\u6570\u88ab\u79f0\u4e3a\u865a\u51fd\u6570\u3002\u6ce8\u610f\u975e\u6210\u5458\u51fd\u6570\u4e0d\u80fd\u52a0 virtual \u4fee\u9970\u3002<\/li>\n<li>\u5b83\u5141\u8bb8\u6d3e\u751f\u7c7b \u91cd\u5199&#xff08;Override&#xff09; \u57fa\u7c7b\u7684\u51fd\u6570\u5b9e\u73b0&#xff0c;\u5e76\u901a\u8fc7\u57fa\u7c7b\u6307\u9488\/\u5f15\u7528\u8c03\u7528\u6d3e\u751f\u7c7b\u7684\u7248\u672c\u3002<\/li>\n<\/ul>\n<p>\u865a\u51fd\u6570\u7684\u5b9a\u4e49&#xff1a;<\/p>\n<p>\u57fa\u7c7b\u58f0\u660e\u865a\u51fd\u6570&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Animal<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">speak<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ \u4f7f\u7528 virtual \u5173\u952e\u5b57<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Animal sound\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6d3e\u751f\u7c7b\u91cd\u5199\u865a\u51fd\u6570&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Dog<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Animal<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">speak<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ \u4f7f\u7528 override \u660e\u786e\u91cd\u5199&#xff08;C&#043;&#043;11&#xff09;<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Woof!\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u901a\u8fc7\u57fa\u7c7b\u8c03\u7528&#xff1a;\u901a\u8fc7\u57fa\u7c7b\u6307\u9488\/\u5f15\u7528\u8c03\u7528\u865a\u51fd\u6570\u65f6&#xff0c;\u5b9e\u9645\u8c03\u7528\u7684\u662f \u5bf9\u8c61\u5b9e\u9645\u7c7b\u578b \u7684\u51fd\u6570&#xff1a;<\/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    Animal <span class=\"token operator\">*<\/span>animal <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token function\">Dog<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    animal<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">speak<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa &#034;Woof!&#034;&#xff08;\u8c03\u7528 Dog \u7684\u5b9e\u73b0&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">delete<\/span> animal<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&#xff1a;<\/p>\n<p>Woof<span class=\"token operator\">!<\/span><\/p>\n<h4>\u865a\u51fd\u6570\u7684\u91cd\u5199\/\u8986\u76d6&#xff08;override\u548cfinal&#xff09;<\/h4>\n<p>\u865a\u51fd\u6570\u91cd\u5199&#xff08;Override&#xff09; \u662f\u6307\u6d3e\u751f\u7c7b\u91cd\u65b0\u5b9a\u4e49\u57fa\u7c7b\u7684\u865a\u51fd\u6570&#xff0c;\u5b9e\u73b0 \u540c\u7b7e\u540d\u4e0d\u540c\u884c\u4e3a\u3002\u5b83\u662f\u5b9e\u73b0\u8fd0\u884c\u65f6\u591a\u6001\u7684\u5173\u952e\u673a\u5236\u3002<\/p>\n<p>\u865a\u51fd\u6570\u91cd\u5199\u7684\u5fc5\u8981\u6761\u4ef6<\/p>\n<table>\n<tr>\u6761\u4ef6\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>\u57fa\u7c7b\u51fd\u6570\u4e3a\u865a\u51fd\u6570<\/td>\n<td>\u57fa\u7c7b\u51fd\u6570\u5fc5\u987b\u4f7f\u7528 virtual \u58f0\u660e<\/td>\n<\/tr>\n<tr>\n<td>\u51fd\u6570\u7b7e\u540d\u4e00\u81f4<\/td>\n<td>\u6d3e\u751f\u7c7b\u51fd\u6570\u5fc5\u987b\u4e0e\u57fa\u7c7b\u7684 \u51fd\u6570\u540d\u3001\u53c2\u6570\u7c7b\u578b\/\u6570\u91cf\/\u987a\u5e8f\u3001const \u9650\u5b9a\u7b26 \u5b8c\u5168\u4e00\u81f4<\/td>\n<\/tr>\n<tr>\n<td>\u8bbf\u95ee\u6743\u9650\u5141\u8bb8<\/td>\n<td>\u6d3e\u751f\u7c7b\u51fd\u6570\u8bbf\u95ee\u6743\u9650\u4e0d\u80fd\u6bd4\u57fa\u7c7b\u66f4\u4e25\u683c&#xff08;\u5982\u57fa\u7c7b\u4e3a public&#xff0c;\u6d3e\u751f\u7c7b\u4e0d\u80fd\u4e3a private&#xff09;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6ce8\u610f&#xff1a;<\/p>\n<ul>\n<li>\u6d3e\u751f\u7c7b\u5728\u91cd\u5199\u57fa\u7c7b\u865a\u51fd\u6570\u65f6&#xff0c;\u5728\u4e0d\u52a0 virtual \u5173\u952e\u5b57\u65f6&#xff0c;\u867d\u7136\u4e5f\u53ef\u4ee5\u6784\u6210\u91cd\u5199(\u56e0\u4e3a\u7ee7\u627f\u540e\u57fa\u7c7b\u7684\u865a\u51fd\u6570\u88ab\u7ee7\u627f\u4e0b\u6765\u4e86&#xff0c;\u5728\u6d3e\u751f\u7c7b\u4f9d\u65e7\u4fdd\u6301\u865a\u51fd\u6570\u5c5e\u6027)&#xff0c;\u4f46\u662f\u8be5\u79cd\u5199\u6cd5\u4e0d\u662f\u5f88\u89c4\u8303&#xff0c;\u4e0d\u5efa\u8bae\u8fd9\u6837\u4f7f\u7528\u3002<\/li>\n<li>\u4e0d\u8fc7\u8981\u7262\u8bb0&#xff0c;\u5373\u4f7f\u6d3e\u751f\u7c7b\u7ee7\u627f\u4e0b\u6765\u7684\u865a\u51fd\u6570\u5373\u4fbf\u4e0d\u52a0 virtual \u5173\u952e\u5b57\u4e5f\u53ef\u4ee5\u91cd\u5199\u57fa\u7c7b\u7684\u865a\u51fd\u6570&#xff0c;\u6784\u6210\u591a\u6001&#xff01;<\/li>\n<\/ul>\n<p>\u865a\u51fd\u6570\u91cd\u5199\u65f6\u7684\u5e38\u89c1\u9519\u8bef&#xff1a;<\/p>\n<p>\u51fd\u6570\u7b7e\u540d\u4e0d\u4e00\u81f4&#xff1a;<\/p>\n<ul>\n<li>\u9519\u8bef\u539f\u56e0&#xff1a;\u6d3e\u751f\u7c7b\u4e2d\u91cd\u5199\u7684\u51fd\u6570\u4e0e\u57fa\u7c7b\u865a\u51fd\u6570\u7684\u53c2\u6570\u5217\u8868\u3001\u8fd4\u56de\u7c7b\u578b&#xff08;\u975e\u534f\u53d8\u7c7b\u578b&#xff09;\u6216 const \u4fee\u9970\u7b26\u4e0d\u4e00\u81f4\u3002<\/li>\n<li>\u540e\u679c&#xff1a;\u7f16\u8bd1\u5668\u4e0d\u4f1a\u62a5\u9519&#xff0c;\u4f46\u51fd\u6570\u4e0d\u4f1a\u6b63\u786e\u8986\u76d6\u57fa\u7c7b\u865a\u51fd\u6570&#xff0c;\u800c\u662f\u5f62\u6210\u9690\u85cf&#xff08;hide&#xff09;\u3002\u8fd9\u4e2a\u4e4b\u524d\u8bb2\u8fc7&#xff0c;\u6d3e\u751f\u7c7b\u4f1a\u9690\u85cf\u548c\u57fa\u7c7b\u4e2d\u51fd\u6570\u7b7e\u540d\u76f8\u540c\u7684\u51fd\u6570\u3002<\/li>\n<\/ul>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Base<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Derived<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Base<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">double<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span> <span class=\"token comment\">\/\/ \u53c2\u6570\u7c7b\u578b\u4e0d\u4e00\u81f4&#xff0c;\u672a\u8986\u76d6\u57fa\u7c7b func(int)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<p>\u6ca1\u6709\u4f7f\u7528 override \u5173\u952e\u5b57&#xff1a;<\/p>\n<ul>\n<li>\u9519\u8bef\u539f\u56e0&#xff1a;\u672a\u5728\u6d3e\u751f\u7c7b\u4e2d\u4f7f\u7528 C&#043;&#043;11 \u5f15\u5165\u7684 override \u5173\u952e\u5b57\u660e\u786e\u6807\u8bb0\u91cd\u5199\u3002<\/li>\n<li>\u540e\u679c&#xff1a;\u82e5\u51fd\u6570\u7b7e\u540d\u9519\u8bef&#xff0c;\u7f16\u8bd1\u5668\u53ef\u80fd\u4e0d\u4f1a\u63d0\u793a\u9519\u8bef&#xff0c;\u5bfc\u81f4\u9690\u85cf\u800c\u975e\u8986\u76d6\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Derived<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Base<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span> <span class=\"token comment\">\/\/ \u4f7f\u7528 override \u5f3a\u5236\u7f16\u8bd1\u5668\u68c0\u67e5\u8986\u76d6<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<p>\u57fa\u7c7b\u865a\u51fd\u6570\u672a\u58f0\u660e\u4e3a virtual&#xff1a;<\/p>\n<ul>\n<li>\u9519\u8bef\u539f\u56e0&#xff1a;\u57fa\u7c7b\u51fd\u6570\u672a\u7528 virtual \u4fee\u9970&#xff0c;\u4f46\u6d3e\u751f\u7c7b\u8bd5\u56fe\u91cd\u5199\u3002<\/li>\n<li>\u540e\u679c&#xff1a;\u6d3e\u751f\u7c7b\u51fd\u6570\u4e0e\u57fa\u7c7b\u51fd\u6570\u662f\u72ec\u7acb\u7684&#xff0c;\u65e0\u6cd5\u901a\u8fc7\u57fa\u7c7b\u6307\u9488\/\u5f15\u7528\u8c03\u7528\u591a\u6001\u3002<\/li>\n<\/ul>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Base<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span> <span class=\"token comment\">\/\/ \u975e\u865a\u51fd\u6570<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Derived<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Base<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span> <span class=\"token comment\">\/\/ \u9690\u85cf\u57fa\u7c7b\u51fd\u6570&#xff0c;\u65e0\u6cd5\u591a\u6001\u8c03\u7528<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<p>\u6ce8\u610f&#xff1a;<\/p>\n<ul>\n<li>&#8211; override \u662f C&#043;&#043;11 \u5f15\u5165\u7684\u4e00\u4e2a\u65b0\u7279\u6027&#xff0c;\u5b83\u5e76\u975e\u5f3a\u5236\u8981\u6c42\u3002\u5728\u6ca1\u6709 override \u5173\u952e\u5b57\u65f6&#xff0c;\u6ee1\u8db3\u6761\u4ef6\u91cd\u5199\u7684\u6761\u4ef6\u540c\u6837\u53ef\u4ee5\u6784\u6210\u865a\u51fd\u6570\u7684\u91cd\u5199&#xff0c;\u53ea\u662f\u82e5\u6d3e\u751f\u7c7b\u51fd\u6570\u4f7f\u7528 override\u58f0\u660e&#xff0c;\u4f46\u672a\u6b63\u786e\u91cd\u5199\u57fa\u7c7b\u865a\u51fd\u6570&#xff08;\u5982\u51fd\u6570\u540d\u3001\u53c2\u6570\u5217\u8868\u6216\u5e38\u91cf\u6027\u4e0d\u5339\u914d&#xff09;&#xff0c;\u7f16\u8bd1\u5668\u4f1a\u62a5\u9519&#xff0c;\u6709\u52a9\u4e8e\u5728\u7f16\u8bd1\u9636\u6bb5\u53d1\u73b0\u9519\u8bef\u3002<\/li>\n<li>C&#043;&#043;11\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5173\u952e\u5b57\u53eb\u505a final&#xff0c;\u5982\u679c\u6211\u4eec\u4e0d\u60f3\u8ba9\u6d3e\u751f\u7c7b\u91cd\u5199\u8fd9\u4e2a\u865a\u51fd\u6570&#xff0c;\u90a3\u4e48\u53ef\u4ee5\u7528 final \u53bb\u4fee\u9970\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Car<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">Drive<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Benz<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Car<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">Drive<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Benz&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ \u7f16\u8bd1\u51fa\u9519,\u65e0\u6cd5\u91cd\u5199final\u4fee\u9970\u7684\u865a\u51fd\u6570<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<p>\u8d81\u70ed\u6253\u94c1&#xff0c;\u63a5\u4e0b\u6765\u6211\u4eec\u770b\u4e00\u9053\u6709\u5173\u591a\u6001\u573a\u666f\u7684\u9009\u62e9\u9898&#xff1a;<\/p>\n<p>\u4ee5\u4e0b\u7a0b\u5e8f\u8f93\u51fa\u7ed3\u679c\u662f\u4ec0\u4e48&#xff08;&#xff09;<\/p>\n<ul>\n<li>A: A-&gt;0<\/li>\n<li>B: B-&gt;1<\/li>\n<li>C: A-&gt;1<\/li>\n<li>D: B-&gt;0<\/li>\n<li>E: \u7f16\u8bd1\u51fa\u9519<\/li>\n<li>F: \u4ee5\u4e0a\u90fd\u4e0d\u6b63\u786e<\/li>\n<\/ul>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">A<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> val <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;A-&gt;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> val <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">test<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">B<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">A<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> val <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;B-&gt;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> val <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><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 keyword\">int<\/span> argc<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>argv<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    B <span class=\"token operator\">*<\/span>p <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> B<span class=\"token punctuation\">;<\/span><br \/>\n    p<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">test<\/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>\u6b63\u786e\u7684\u7b54\u6848\u662fB\u54e6&#xff01;\u4e0d\u77e5\u9053\u4f60\u505a\u5bf9\u4e86\u6ca1\u6709&#xff0c;\u53ef\u4ee5\u60f3\u60f3\u4ee5\u4e0b\u4e24\u4e2a\u95ee\u9898\u54e6&#xff1a;<\/p>\n<p>1. func\u662f\u5426\u6ee1\u8db3\u865a\u51fd\u6570\u7684\u91cd\u5199\u6761\u4ef6&#xff1f; 2. \u9ed8\u8ba4\u53c2\u6570\u7684\u786e\u5b9a\u5b9e\u5728\u7f16\u8bd1\u65f6\u8fd8\u662f\u8fd0\u884c\u65f6\u5462&#xff1f;<\/p>\n<hr \/>\n<h4>\u7eaf\u865a\u51fd\u6570&#xff08;Pure Virtual Function&#xff09;\u548c\u62bd\u8c61\u7c7b<\/h4>\n<p>\u7eaf\u865a\u51fd\u6570&#xff08;Pure Virtual Function&#xff09; \u662f\u4e00\u79cd\u6ca1\u6709\u5177\u4f53\u5b9e\u73b0\u7684\u865a\u51fd\u6570&#xff0c;\u5176\u5b58\u5728\u7684\u76ee\u7684\u662f\u5f3a\u5236\u6d3e\u751f\u7c7b\u5fc5\u987b\u5b9e\u73b0\u8be5\u51fd\u6570\u3002\u5b83\u7684\u58f0\u660e\u65b9\u5f0f\u662f\u5728\u865a\u51fd\u6570\u58f0\u660e\u672b\u5c3e\u6dfb\u52a0 &#061; 0\u3002<\/p>\n<p>\u4f8b\u5982;<\/p>\n<p><span class=\"token keyword\">virtual<\/span> \u8fd4\u56de\u7c7b\u578b \u51fd\u6570\u540d<span class=\"token punctuation\">(<\/span>\u53c2\u6570<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u7eaf\u865a\u51fd\u6570<\/span><\/p>\n<p>\u7eaf\u865a\u51fd\u6570\u7684\u4f5c\u7528&#xff1a;<\/p>\n<ul>\n<li>\u5b9a\u4e49\u63a5\u53e3\u89c4\u8303&#xff1a;\u7eaf\u865a\u51fd\u6570\u4e3a\u6240\u6709\u6d3e\u751f\u7c7b\u5b9a\u4e49\u4e00\u4e2a\u5fc5\u987b\u5b9e\u73b0\u7684\u7edf\u4e00\u63a5\u53e3\u3002<\/li>\n<li>\u521b\u5efa\u62bd\u8c61\u7c7b&#xff1a;\u5305\u542b\u7eaf\u865a\u51fd\u6570\u7684\u7c7b\u79f0\u4e3a\u62bd\u8c61\u7c7b&#xff0c;\u5b83\u4e0d\u80fd\u88ab\u76f4\u63a5\u5b9e\u4f8b\u5316&#xff08;\u4e0d\u80fd\u521b\u5efa\u5bf9\u8c61&#xff09;\u3002<\/li>\n<li>\u5f3a\u5236\u6d3e\u751f\u7c7b\u5b9e\u73b0&#xff1a;\u6240\u6709\u76f4\u63a5\u7ee7\u627f\u81ea\u62bd\u8c61\u7c7b\u7684\u6d3e\u751f\u7c7b\u5fc5\u987b\u91cd\u5199&#xff08;override&#xff09;\u7eaf\u865a\u51fd\u6570&#xff0c;\u5426\u5219\u6d3e\u751f\u7c7b\u4e5f\u4f1a\u6210\u4e3a\u62bd\u8c61\u7c7b\u3002<\/li>\n<\/ul>\n<p>\u7b80\u5355\u6765\u8bf4\u5c31\u662f&#xff0c;\u5982\u679c\u57fa\u7c7b\u5b9a\u4e49\u4e86\u7eaf\u865a\u51fd\u6570&#xff0c;\u90a3\u4e48\u8fd9\u4e2a\u57fa\u7c7b\u88ab\u79f0\u4e3a\u62bd\u8c61\u7c7b&#xff0c;\u4e0d\u80fd\u7528\u6765\u521b\u5efa\u5bf9\u8c61&#xff0c;\u540c\u65f6\u7ee7\u627f\u4e86\u8be5\u7c7b\u7684\u6d3e\u751f\u7c7b\u5fc5\u987b\u91cd\u5199\u8be5\u7eaf\u865a\u51fd\u6570&#xff0c;\u5426\u5219\u6d3e\u751f\u7c7b\u4e5f\u5c06\u6210\u4e3a\u62bd\u8c61\u7c7b\u3002\u8fd9\u6837\u4e00\u6765&#xff0c;\u57fa\u7c7b\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u7edf\u4e00\u7684\u63a5\u53e3&#xff0c;\u5177\u4f53\u5b9e\u73b0\u4ea4\u7ed9\u4e0d\u540c\u7684\u6d3e\u751f\u7c7b\u5b9e\u73b0\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ \u62bd\u8c61\u57fa\u7c7b&#xff08;\u5305\u542b\u7eaf\u865a\u51fd\u6570&#xff09;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Animal<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">sound<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u7eaf\u865a\u51fd\u6570<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token operator\">~<\/span><span class=\"token function\">Animal<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span>            <span class=\"token comment\">\/\/ \u865a\u6790\u6784\u51fd\u6570&#xff08;\u91cd\u8981&#xff01;&#xff09;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u6d3e\u751f\u7c7b\u5fc5\u987b\u5b9e\u73b0 sound()<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Dog<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Animal<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">sound<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">override<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ \u91cd\u5199\u7eaf\u865a\u51fd\u6570<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Woof!&#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 punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Cat<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Animal<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">sound<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">override<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ \u91cd\u5199\u7eaf\u865a\u51fd\u6570<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Meow!&#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 punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u7eaf\u865a\u51fd\u6570\u53ef\u4ee5\u6709\u5b9e\u73b0&#xff08;\u4f46\u901a\u5e38\u4e0d\u9700\u8981&#xff09;<\/p>\n<p>&#8211; C&#043;&#043;\u5141\u8bb8\u57fa\u7c7b\u4e3a\u7eaf\u865a\u51fd\u6570\u63d0\u4f9b\u9ed8\u8ba4\u5b9e\u73b0&#xff0c;\u4f46\u6d3e\u751f\u7c7b\u4ecd\u9700\u663e\u5f0f\u91cd\u5199&#xff0c;\u6ce8\u610f\u7eaf\u865a\u51fd\u6570\u7684\u5b9e\u73b0\u5fc5\u987b\u5728\u7c7b\u5916&#xff01;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Animal<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">sound<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u7eaf\u865a\u51fd\u6570\u7684\u9ed8\u8ba4\u5b9e\u73b0&#xff08;\u7f55\u89c1\u7528\u6cd5&#xff09;\u5fc5\u987b\u5b9e\u5728\u7c7b\u5916\u5b9e\u73b0\u7684&#xff01;<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token class-name\">Animal<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">sound<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Default animal sound&#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 punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Dog<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Animal<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">sound<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">override<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Animal<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">sound<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8c03\u7528\u57fa\u7c7b\u7684\u9ed8\u8ba4\u5b9e\u73b0<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Woof!&#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 punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<h4>\u865a\u6790\u6784\u51fd\u6570&#xff08;Virtual Destructor&#xff09;<\/h4>\n<p>\u770b\u4e0b\u9762\u4e00\u4e2a\u4f8b\u5b50&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Base<\/span><br \/>\n<span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ \u57fa\u7c7b&#xff08;\u65e0\u865a\u6790\u6784\u51fd\u6570&#xff09;<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token operator\">~<\/span><span class=\"token function\">Base<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Base destructor\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Derived<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Base<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ \u6d3e\u751f\u7c7b&#xff08;\u6301\u6709\u52a8\u6001\u8d44\u6e90&#xff09;<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span>data<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">Derived<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        data <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u52a8\u6001\u5206\u914d\u5185\u5b58<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token operator\">~<\/span><span class=\"token function\">Derived<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">delete<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> data<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u91ca\u653e\u5185\u5b58<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Derived destructor\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><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    Base <span class=\"token operator\">*<\/span>obj <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token function\">Derived<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u57fa\u7c7b\u6307\u9488\u6307\u5411\u6d3e\u751f\u7c7b\u5bf9\u8c61<\/span><br \/>\n    <span class=\"token keyword\">delete<\/span> obj<span class=\"token punctuation\">;<\/span>                <span class=\"token comment\">\/\/ \u4ec5\u8c03\u7528\u4e86Base\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570<\/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&#xff1a;<\/p>\n<p>Base destructor<\/p>\n<p>\u4e0d\u96be\u53d1\u73b0&#xff0c;\u5f53\u6211\u4eec\u7528\u57fa\u7c7b\u7684\u6307\u9488\u6307\u5411\u6d3e\u751f\u7c7b&#xff0c;\u91ca\u653e\u57fa\u7c7b\u6307\u9488\u65f6&#xff0c;\u53ea\u8c03\u7528\u4e86\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570&#xff0c;\u91ca\u653e\u4e86\u57fa\u7c7b\u4e2d\u7684\u8d44\u6e90&#xff0c;\u5e76\u6ca1\u6709\u8c03\u7528\u6d3e\u751f\u7c7b\u7684\u6790\u6784\u51fd\u6570&#xff0c;\u8fd9\u4f1a\u5bfc\u81f4\u4ec0\u4e48\u95ee\u9898\u5462&#xff1f;<\/p>\n<p>\u662f\u4e0d\u662f\u4f1a\u5bfc\u81f4\u8d44\u6e90\u6ca1\u6709\u6b63\u786e\u91ca\u653e&#xff0c;\u6d3e\u751f\u7c7b\u4e2d\u7684data\u6307\u5411\u7684100\u4e2a int \u5185\u5b58\u672a\u88ab\u91ca\u653e&#xff0c;\u4f1a\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002<\/p>\n<p>\u5982\u679c\u57fa\u7c7b\u4e2d\u8fd8\u6709\u5176\u4ed6\u52a8\u6001\u8d44\u6e90&#xff0c;\u6bd4\u5982\u6587\u4ef6\u53e5\u67c4\u3001\u6570\u636e\u5e93\u8fde\u63a5\u7b49\u8d44\u6e90&#xff0c;\u8fd9\u4e9b\u8d44\u6e90\u4e5f\u4f1a\u6cc4\u6f0f\u3002\u4f1a\u5bf9\u6574\u4e2a\u7a0b\u5e8f\u9020\u6210\u91cd\u5927\u5f71\u54cd&#xff01;\u8fd9\u65f6\u5c31\u9700\u8981\u4f7f\u7528\u865a\u6790\u6784\u51fd\u6570\u6765\u89e3\u51b3\u95ee\u9898 !<\/p>\n<p>\u865a\u6790\u6784\u51fd\u6570&#xff08;Virtual Destructor&#xff09; \u662f C&#043;&#043;\u4e2d\u7528\u4e8e\u89e3\u51b3\u591a\u6001\u5bf9\u8c61\u8d44\u6e90\u91ca\u653e\u95ee\u9898\u7684\u5173\u952e\u673a\u5236\u3002\u5b83\u901a\u8fc7\u52a8\u6001\u7ed1\u5b9a\u786e\u4fdd\u901a\u8fc7\u57fa\u7c7b\u6307\u9488\u5220\u9664\u6d3e\u751f\u7c7b\u5bf9\u8c61\u65f6&#xff0c;\u6d3e\u751f\u7c7b\u548c\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u90fd\u80fd\u88ab\u6b63\u786e\u8c03\u7528&#xff0c;\u907f\u514d\u8d44\u6e90\u6cc4\u6f0f\u3002<\/p>\n<ul>\n<li>\u865a\u6790\u6784\u51fd\u6570\u662f\u7528 virtual \u5173\u952e\u5b57\u58f0\u660e\u7684\u6790\u6784\u51fd\u6570\u3002<\/li>\n<li>\u5f53\u57fa\u7c7b\u6307\u9488\u6307\u5411\u6d3e\u751f\u7c7b\u5bf9\u8c61\u65f6&#xff0c;\u82e5\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u662f\u865a\u51fd\u6570&#xff0c;\u5220\u9664\u8be5\u6307\u9488\u4f1a\u89e6\u53d1\u52a8\u6001\u7ed1\u5b9a&#xff0c;\u786e\u4fdd\u8c03\u7528\u5b9e\u9645\u5bf9\u8c61\u7c7b\u578b\u7684\u6790\u6784\u51fd\u6570\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Base<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token operator\">~<\/span><span class=\"token function\">Base<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ \u58f0\u660e\u4e3a\u865a\u6790\u6784\u51fd\u6570<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Base destroyed\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Derived<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Base<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token operator\">~<\/span><span class=\"token function\">Derived<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ \u91cd\u5199\u865a\u6790\u6784\u51fd\u6570<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Derived destroyed\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><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    Base <span class=\"token operator\">*<\/span>obj <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token function\">Derived<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">delete<\/span> obj<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6b63\u786e\u8c03\u7528Derived\u548cBase\u7684\u6790\u6784\u51fd\u6570<\/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&#xff1a;<\/p>\n<p>Derived destroyed<br \/>\nBase destroyed<\/p>\n<p>\u8fd8\u8bb0\u5f97\u4e4b\u524d\u8bb2\u5230\u7684&#xff0c;\u865a\u51fd\u6570\u91cd\u5199\u7684\u8981\u6c42\u5417&#xff1f;\u6d3e\u751f\u7c7b\u7684\u6790\u6784\u51fd\u6570\u4e0e\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u540d\u79f0\u90fd\u4e0d\u4e00\u6837!\u600e\u4e48\u80fd\u6784\u6210\u91cd\u5199\u5462&#xff1f;<\/p>\n<p>\u5b9e\u9645\u4e0a&#xff0c;\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u4e3a\u865a\u51fd\u6570&#xff0c;\u6b64\u65f6\u6d3e\u751f\u7c7b\u6790\u6784\u51fd\u6570\u53ea\u8981\u5b9a\u4e49&#xff0c;\u65e0\u8bba\u662f\u5426\u52a0 virtual \u5173\u952e\u5b57&#xff0c;\u90fd\u4e0e\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u6784\u6210\u91cd\u5199&#xff0c;\u867d\u7136\u57fa\u7c7b\u4e0e\u6d3e\u751f\u7c7b\u6790\u6784\u51fd\u6570\u540d\u5b57\u4e0d\u540c\u770b\u8d77\u6765\u4e0d\u7b26\u5408\u91cd\u5199\u7684\u89c4\u5219&#xff0c;\u5b9e\u9645\u4e0a\u7f16\u8bd1\u5668\u5bf9\u6790\u6784\u51fd\u6570\u7684\u540d\u79f0\u505a\u4e86\u7279\u6b8a\u5904\u7406&#xff0c;\u7f16\u8bd1\u540e\u6790\u6784\u51fd\u6570\u7684\u540d\u79f0\u7edf\u2f00\u5904\u7406\u6210 destructor&#xff0c;\u6240\u4ee5\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u52a0\u4e86 virltual \u4fee\u9970&#xff0c;\u6d3e\u2f63\u7c7b\u7684\u6790\u6784\u51fd\u6570\u5c31\u6784\u6210\u91cd\u5199\u3002<\/p>\n<p>\u865a\u6790\u6784\u51fd\u6570\u7684\u539f\u7406&#xff1a;&#xff08;TODO&#xff09;<\/p>\n<p>\u6d89\u53ca\u5230\u865a\u51fd\u6570\u8868&#xff0c;\u6211\u4eec\u653e\u5728\u591a\u6001\u7684\u539f\u7406\u4e2d\u8bb2&#xff0c;\u76f8\u4fe1\u5927\u5bb6\u770b\u5230\u90a3\u91cc\u81ea\u7136\u5c31\u4f1a\u660e\u767d&#xff01;<\/p>\n<hr \/>\n<h4>\u534f\u53d8&#xff08;Covariant Return Types&#xff09;<\/h4>\n<p>C&#043;&#043;\u865a\u51fd\u6570\u7684\u534f\u53d8\u5141\u8bb8\u6d3e\u751f\u7c7b\u5728\u91cd\u5199\u57fa\u7c7b\u865a\u51fd\u6570\u65f6&#xff0c;\u5c06\u8fd4\u56de\u7c7b\u578b\u66ff\u6362\u4e3a\u57fa\u7c7b\u51fd\u6570\u8fd4\u56de\u7c7b\u578b\u7684\u6d3e\u751f\u7c7b\u6307\u9488\u6216\u5f15\u7528\u3002 \u7b80\u5355\u6765\u8bf4\u5c31\u662f&#xff1a; \u6d3e\u751f\u7c7b\u91cd\u5199\u57fa\u7c7b\u865a\u51fd\u6570\u65f6&#xff0c;\u53ef\u4ee5\u4e0e\u57fa\u7c7b\u865a\u51fd\u6570\u8fd4\u56de\u503c\u7c7b\u578b\u4e0d\u540c\u3002\u5373\u57fa\u7c7b\u865a\u51fd\u6570\u8fd4\u56de\u57fa\u7c7b\u5bf9\u8c61\u7684\u6307\u9488\u6216\u8005\u5f15\u7528&#xff0c;\u6d3e\u751f\u7c7b\u865a\u51fd\u6570\u8fd4\u56de\u6d3e\u751f\u7c7b\u5bf9\u8c61\u7684\u6307\u9488\u6216\u8005\u5f15\u7528\u65f6&#xff0c;\u79f0\u4e3a\u534f\u53d8\u3002\u534f\u53d8\u7684\u5b9e\u9645\u610f\u4e49\u5e76\u4e0d\u5927&#xff0c;\u6240\u4ee5\u6211\u4eec\u4e86\u89e3\u2f00\u4e0b\u5373\u53ef\u3002<\/p>\n<p>\u534f\u53d8\u6761\u4ef6&#xff1a;<\/p>\n<ul>\n<li>\u57fa\u7c7b\u548c\u6d3e\u751f\u7c7b\u7684\u865a\u51fd\u6570\u8fd4\u56de\u7c7b\u578b\u5fc5\u987b\u4e3a\u6307\u9488\u6216\u5f15\u7528\u3002<\/li>\n<li>\u6d3e\u751f\u7c7b\u8fd4\u56de\u7c7b\u578b\u5fc5\u987b\u662f\u57fa\u7c7b\u8fd4\u56de\u7c7b\u578b\u7684\u76f4\u63a5\u6216\u95f4\u63a5\u6d3e\u751f\u7c7b\u3002<\/li>\n<li>\u51fd\u6570\u53c2\u6570\u5217\u8868\u5fc5\u987b\u5b8c\u5168\u76f8\u540c\u3002<\/li>\n<\/ul>\n<p>\u4e3e\u4e2a\u4f8b\u5b50&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ \u57fa\u7c7b<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Fruit<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> Fruit<span class=\"token operator\">*<\/span> <span class=\"token function\">clone<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span>   <span class=\"token comment\">\/\/ \u865a\u51fd\u6570&#xff0c;\u8fd4\u56deFruit*(\u57fa\u7c7b\u6307\u9488)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token function\">Fruit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token operator\">~<\/span><span class=\"token function\">Fruit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u6d3e\u751f\u7c7b<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Apple<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Fruit<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    Apple<span class=\"token operator\">*<\/span> <span class=\"token function\">clone<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span>  <span class=\"token comment\">\/\/ \u534f\u53d8&#xff1a;\u8fd4\u56deApple*(\u6d3e\u751f\u7c7b\u6307\u9488)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token function\">Apple<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">)<\/span><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\">sayName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;I am an Apple!&#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 punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><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> <span class=\"token punctuation\">{<\/span><br \/>\n    Fruit<span class=\"token operator\">*<\/span> fruit <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token function\">Apple<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>      <span class=\"token comment\">\/\/ \u57fa\u7c7b\u6307\u9488\u6307\u5411\u6d3e\u751f\u7c7b\u5bf9\u8c61<\/span><br \/>\n    Fruit<span class=\"token operator\">*<\/span> cloned <span class=\"token operator\">&#061;<\/span> fruit<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">clone<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8c03\u7528\u6d3e\u751f\u7c7b\u7684clone()<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u9a8c\u8bc1\u534f\u53d8\u7279\u6027<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>Apple<span class=\"token operator\">*<\/span> apple <span class=\"token operator\">&#061;<\/span> <span class=\"token generic-function\"><span class=\"token function\">dynamic_cast<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>Apple<span class=\"token operator\">*<\/span><span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span>cloned<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        apple<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">sayName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u6210\u529f\u8c03\u7528Apple\u7279\u6709\u65b9\u6cd5<\/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 double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Cloning failed!&#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 punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">delete<\/span> fruit<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">delete<\/span> cloned<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&#xff1a;<\/p>\n<p>I am an Apple<span class=\"token operator\">!<\/span><\/p>\n<p>\u8fd4\u56de\u7c7b\u578b<\/p>\n<ul>\n<li>\u57fa\u7c7b\u865a\u51fd\u6570\u8fd4\u56de Fruit*<\/li>\n<li>\u6d3e\u751f\u7c7b\u91cd\u5199\u65f6\u8fd4\u56de Apple*&#xff08;Apple \u662f Fruit \u7684\u6d3e\u751f\u7c7b&#xff09;<\/li>\n<li>\u7b26\u5408\u534f\u53d8\u8981\u6c42&#xff1a;\u8fd4\u56de\u7c7b\u578b\u662f\u57fa\u7c7b\u8fd4\u56de\u7c7b\u578b\u7684 \u6d3e\u751f\u7c7b\u6307\u9488\/\u5f15\u7528<\/li>\n<\/ul>\n<p>\u591a\u6001\u884c\u4e3a<\/p>\n<ul>\n<li>\u901a\u8fc7\u57fa\u7c7b\u6307\u9488 Fruit* \u8c03\u7528 clone()&#xff0c;\u5b9e\u9645\u8c03\u7528 Apple::clone()<\/li>\n<li>\u8fd4\u56de\u7684 Apple* \u53ef\u4ee5\u9690\u5f0f\u8f6c\u6362\u4e3a Fruit*&#xff0c;\u4f46\u4fdd\u7559\u4e86\u5b9e\u9645\u7c7b\u578b\u4fe1\u606f<\/li>\n<\/ul>\n<p>\u52a8\u6001\u7c7b\u578b\u9a8c\u8bc1<\/p>\n<ul>\n<li>\u4f7f\u7528 dynamic_cast \u5c06 Fruit* \u8f6c\u56de Apple*&#xff0c;\u9a8c\u8bc1\u534f\u53d8\u6b63\u786e\u6027<\/li>\n<li>\u8c03\u7528 Apple \u7c7b\u7684\u7279\u6709\u65b9\u6cd5 sayName()<\/li>\n<\/ul>\n<p>\u5bf9\u4e8e\u534f\u53d8\u5927\u5bb6\u4e86\u89e3\u5373\u53ef&#xff0c;\u5176\u5b9e\u5e95\u5c42\u539f\u7406\u4e5f\u662f\u591a\u6001\u7684\u865a\u51fd\u6570\u8868\u6307\u9488\u3002<\/p>\n<hr \/>\n<h2>\u91cd\u8f7d&#xff08;Overload&#xff09;\u3001\u91cd\u5199&#xff08;Override&#xff09;\u3001\u9690\u85cf&#xff08;Hide&#xff09;\u7684\u5bf9\u6bd4<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250620220530-6855db2abfc44.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<table>\n<tr>\u7279\u6027\u91cd\u8f7d&#xff08;Overload&#xff09;\u91cd\u5199&#xff08;Override&#xff09;\u9690\u85cf&#xff08;Hide&#xff09;<\/tr>\n<tbody>\n<tr>\n<td>\u5b9a\u4e49<\/td>\n<td>\u540c\u4e00\u4f5c\u7528\u57df\u5185&#xff0c;\u540c\u540d\u51fd\u6570\u53c2\u6570\u4e0d\u540c<\/td>\n<td>\u6d3e\u751f\u7c7b\u91cd\u5199\u57fa\u7c7b\u865a\u51fd\u6570<\/td>\n<td>\u6d3e\u751f\u7c7b\u540c\u540d\u51fd\u6570\u906e\u853d\u57fa\u7c7b\u540c\u540d\u51fd\u6570<\/td>\n<\/tr>\n<tr>\n<td>\u4f5c\u7528\u57df<\/td>\n<td>\u540c\u4e00\u7c7b\u6216\u540c\u4e00\u547d\u540d\u7a7a\u95f4<\/td>\n<td>\u57fa\u7c7b\u4e0e\u6d3e\u751f\u7c7b\u4e4b\u95f4<\/td>\n<td>\u57fa\u7c7b\u4e0e\u6d3e\u751f\u7c7b\u4e4b\u95f4<\/td>\n<\/tr>\n<tr>\n<td>\u51fd\u6570\u7b7e\u540d\u8981\u6c42<\/td>\n<td>\u51fd\u6570\u540d\u76f8\u540c&#xff0c;\u53c2\u6570\u5217\u8868\u4e0d\u540c<\/td>\n<td>\u51fd\u6570\u540d\u3001\u53c2\u6570\u3001\u8fd4\u56de\u7c7b\u578b\u5747\u76f8\u540c<\/td>\n<td>\u51fd\u6570\u540d\u76f8\u540c&#xff0c;\u53c2\u6570\u53ef\u540c\u53ef\u4e0d\u540c<\/td>\n<\/tr>\n<tr>\n<td>virtual\u5173\u952e\u5b57<\/td>\n<td>\u4e0d\u9700\u8981<\/td>\n<td>\u57fa\u7c7b\u51fd\u6570\u5fc5\u987b\u4e3a\u865a\u51fd\u6570<\/td>\n<td>\u4e0d\u9700\u8981<\/td>\n<\/tr>\n<tr>\n<td>\u591a\u6001\u6027<\/td>\n<td>\u65e0<\/td>\n<td>\u652f\u6301\u52a8\u6001\u591a\u6001&#xff08;\u8fd0\u884c\u65f6\u7ed1\u5b9a&#xff09;<\/td>\n<td>\u65e0&#xff08;\u9759\u6001\u7ed1\u5b9a&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u793a\u4f8b\u573a\u666f<\/td>\n<td>\u540c\u4e00\u7c7b\u4e2d\u7684\u591a\u4e2a\u6784\u9020\u51fd\u6570<\/td>\n<td>\u6d3e\u751f\u7c7b\u91cd\u5199\u57fa\u7c7b\u7684\u865a\u51fd\u6570<\/td>\n<td>\u6d3e\u751f\u7c7b\u5b9a\u4e49\u4e0e\u57fa\u7c7b\u540c\u540d\u7684\u975e\u865a\u51fd\u6570<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u91cd\u8f7d&#xff08;Overload&#xff09;<\/h3>\n<ul>\n<li>\u91cd\u8f7d\u89c4\u5219&#xff1a;\u5728\u540c\u4e00\u4f5c\u7528\u57df\u5185&#xff0c;\u51fd\u6570\u540d\u76f8\u540c&#xff0c;\u4f46\u53c2\u6570\u5217\u8868\u4e0d\u540c&#xff08;\u53c2\u6570\u7c7b\u578b\u3001\u6570\u91cf\u3001\u987a\u5e8f\u4e0d\u540c&#xff09;\u3002<\/li>\n<li>\u8fd4\u56de\u7c7b\u578b\u65e0\u5173&#xff1a;\u4ec5\u8fd4\u56de\u7c7b\u578b\u4e0d\u540c\u4e0d\u6784\u6210\u91cd\u8f7d&#xff0c;\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002<\/li>\n<li>\u5178\u578b\u573a\u666f&#xff1a;\u540c\u4e00\u7c7b\u4e2d\u7684\u591a\u4e2a\u6784\u9020\u51fd\u6570\u3001\u5de5\u5177\u51fd\u6570\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Calculator<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u91cd\u8f7d\u793a\u4f8b<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> <span class=\"token function\">add<\/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 punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">;<\/span> <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> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">double<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span>  <span class=\"token comment\">\/\/ \u53c2\u6570\u7c7b\u578b\u4e0d\u540c<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> <span class=\"token function\">add<\/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 punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> c<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b <span class=\"token operator\">&#043;<\/span> c<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span> <span class=\"token comment\">\/\/ \u53c2\u6570\u6570\u91cf\u4e0d\u540c<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<h3>\u91cd\u5199&#xff08;Override&#xff09;<\/h3>\n<ul>\n<li>\u91cd\u5199\u89c4\u5219&#xff1a;\u6d3e\u751f\u7c7b\u91cd\u65b0\u5b9a\u4e49\u57fa\u7c7b\u7684 \u865a\u51fd\u6570&#xff0c;\u8981\u6c42\u51fd\u6570\u540d\u3001\u53c2\u6570\u5217\u8868\u3001\u8fd4\u56de\u7c7b\u578b\u5b8c\u5168\u4e00\u81f4&#xff08;\u534f\u53d8\u8fd4\u56de\u7c7b\u578b\u4f8b\u5916&#xff09;\u3002<\/li>\n<li>\u591a\u6001\u6027&#xff1a;\u901a\u8fc7\u865a\u51fd\u6570\u8868&#xff08;vtable&#xff09;\u5b9e\u73b0\u8fd0\u884c\u65f6\u591a\u6001\u3002<\/li>\n<li>\u5fc5\u987b\u4f7f\u7528 virtual&#xff1a;\u57fa\u7c7b\u51fd\u6570\u58f0\u660e\u4e3a virtual&#xff0c;\u6d3e\u751f\u7c7b\u5efa\u8bae\u4f7f\u7528 override \u660e\u786e\u610f\u56fe&#xff08;C&#043;&#043;11&#043;&#xff09;\u3002<\/li>\n<\/ul>\n<p>\u4e3e\u4f8b\u5c31\u7701\u7565&#xff0c;\u4e0a\u9762\u6211\u4eec\u521a\u8bb2\u8fc7\u3002<\/p>\n<hr \/>\n<h3>\u9690\u85cf&#xff08;Hide&#xff09;<\/h3>\n<ul>\n<li>\u9690\u85cf\u89c4\u5219&#xff1a;\u6d3e\u751f\u7c7b\u5b9a\u4e49\u4e0e\u57fa\u7c7b\u540c\u540d\u7684\u51fd\u6570&#xff08;\u65e0\u8bba\u53c2\u6570\u662f\u5426\u76f8\u540c&#xff09;&#xff0c;\u5bfc\u81f4\u57fa\u7c7b\u540c\u540d\u51fd\u6570\u88ab\u9690\u85cf\u3002<\/li>\n<\/ul>\n<p>\u4e24\u79cd\u5f62\u5f0f&#xff1a;<\/p>\n<ul>\n<li>\u540c\u540d\u540c\u53c2\u975e\u865a\u51fd\u6570&#xff1a;\u6d3e\u751f\u7c7b\u51fd\u6570\u9690\u85cf\u57fa\u7c7b\u51fd\u6570&#xff08;\u5373\u4f7f\u57fa\u7c7b\u51fd\u6570\u975e\u865a&#xff09;\u3002<\/li>\n<li>\u540c\u540d\u4e0d\u540c\u53c2&#xff1a;\u6d3e\u751f\u7c7b\u51fd\u6570\u9690\u85cf\u57fa\u7c7b\u6240\u6709\u540c\u540d\u51fd\u6570&#xff08;\u5305\u62ec\u91cd\u8f7d\u7248\u672c&#xff09;\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Base<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Base::func()\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Base::func(int)\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span>  <span class=\"token comment\">\/\/ \u91cd\u8f7d\u7248\u672c<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Derived<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Base<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u9690\u85cf\u57fa\u7c7b\u7684\u6240\u6709 func \u51fd\u6570&#xff08;\u5305\u62ec\u91cd\u8f7d&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Derived::func()\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><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> <span class=\"token punctuation\">{<\/span><br \/>\n    Derived d<span class=\"token punctuation\">;<\/span><br \/>\n    d<span class=\"token punctuation\">.<\/span><span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u6b63\u786e&#xff1a;\u8c03\u7528 Derived::func()<\/span><br \/>\n    <span class=\"token comment\">\/\/ d.func(1); \/\/ \u9519\u8bef&#xff01;Base::func(int) \u88ab\u9690\u85cf<\/span><br \/>\n    d<span class=\"token punctuation\">.<\/span><span class=\"token class-name\">Base<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6b63\u786e&#xff1a;\u663e\u5f0f\u8c03\u7528\u57fa\u7c7b\u51fd\u6570<\/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<hr \/>\n<h2>\u591a\u6001\u7684\u539f\u7406<\/h2>\n<h3>\u865a\u51fd\u6570\u8868&#xff08;vtable&#xff09;<\/h3>\n<h4>\u865a\u51fd\u6570\u8868\u7684\u6982\u5ff5<\/h4>\n<ul>\n<li>\u865a\u51fd\u6570\u8868&#xff08;vtable&#xff09; \u662f\u5728\u7f16\u8bd1\u671f\u95f4&#xff0c;\u7f16\u8bd1\u5668\u4e3a\u6bcf\u4e2a\u5305\u542b\u865a\u51fd\u6570\u7684\u7c7b\u751f\u6210\u7684\u9759\u6001\u8868&#xff0c;\u5b58\u50a8\u8be5\u7c7b\u6240\u6709\u865a\u51fd\u6570\u7684\u5730\u5740&#xff0c;\u751f\u6210\u540e\u4e0d\u53ef\u4fee\u6539\u3002<\/li>\n<li>\u865a\u51fd\u6570\u6307\u9488&#xff08;vptr&#xff09; \u662f\u6bcf\u4e2a\u5bf9\u8c61\u5b9e\u4f8b\u4e2d\u9690\u542b\u7684\u6307\u9488&#xff0c;\u6307\u5411\u5176\u6240\u5c5e\u7c7b\u7684\u865a\u51fd\u6570\u8868\u3002<\/li>\n<\/ul>\n<p>\u5185\u5b58\u5e03\u5c40\u793a\u4f8b<\/p>\n<p>\u770b\u4e0b\u9762\u4e00\u9053\u9898&#xff1a; \u4e0b\u9762\u7a0b\u5e8f \u572832\u4f4d\u7a0b\u5e8f\u7684\u8fd0\u884c\u7ed3\u679c\u662f\u4ec0\u4e48&#xff08;&#xff09; &#xff08;32\u4f4d\u4e0b\u6307\u9488\u5927\u5c0f\u4e3a4\u4e2a\u5b57\u8282&#xff09;<\/p>\n<ul>\n<li>A. \u7f16\u8bd1\u62a5\u9519<\/li>\n<li>B. \u8fd0\u884c\u62a5\u9519<\/li>\n<li>C. 8<\/li>\n<li>D. 12<\/li>\n<\/ul>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Base<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">Func1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Func1()&#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 punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">protected<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> _b <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> _ch <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;x&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><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    Base b<span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>b<span class=\"token punctuation\">)<\/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<p>\u6b63\u786e\u7b54\u6848\u4e3aD&#xff0c;12\u4e2a\u5b57\u8282&#xff0c;\u4f60\u56de\u7b54\u5bf9\u4e86\u5417&#xff1f;<\/p>\n<p>\u6210\u5458\u53d8\u91cf\u5185\u5b58\u5e03\u5c40&#xff1a;<\/p>\n<ul>\n<li>int _b&#xff1a;\u53604\u5b57\u8282\u3002<\/li>\n<li>char _ch&#xff1a;\u53601\u5b57\u8282\u3002<\/li>\n<\/ul>\n<p>\u5185\u5b58\u5bf9\u9f50&#xff1a;<\/p>\n<ul>\n<li>\u7ed3\u6784\u4f53\u7684\u603b\u5927\u5c0f\u9700\u5bf9\u9f50\u52304\u5b57\u8282&#xff08;int\u7684\u5bf9\u9f50\u8981\u6c42&#xff09;\u3002<\/li>\n<li>char _ch\u540e\u9700\u586b\u51453\u5b57\u8282\u4ee5\u6ee1\u8db3\u5bf9\u9f50\u3002<\/li>\n<\/ul>\n<p>C&#043;&#043;\u4e2d\u7c7b\u548cC\u8bed\u8a00\u4e2d\u7684\u7ed3\u6784\u4f53\u90fd\u6ee1\u8db3\u5185\u5b58\u5bf9\u9f50\u7684\u89c4\u5219&#xff0c;\u6240\u4ee5\u6210\u5458\u53d8\u91cf\u4e00\u5171\u5360\u4e868\u4e2a\u5b57\u8282&#xff0c;\u90a3\u4e48\u8fd8\u6709\u53e6\u59164\u4e2a\u5b57\u8282\u662f\u4ec0\u4e48\u5462&#xff1f;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250620220531-6855db2b1b0fa.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u8fd8\u591a\u2f00\u4e2a __vfptr\u653e\u5728\u5bf9\u8c61\u7684\u524d\u9762&#xff08;\u6ce8\u610f\u6709\u4e9b\u5e73\u53f0\u53ef\u80fd\u4f1a\u653e\u5230\u5bf9\u8c61\u7684\u6700\u540e\u9762&#xff0c;\u8fd9\u4e2a\u8ddf\u5e73\u53f0\u6709\u5173&#xff09;&#xff0c;\u5bf9\u8c61\u4e2d\u7684\u8fd9\u4e2a\u6307\u9488\u6211\u4eec\u53eb\u505a\u865a\u51fd\u6570\u8868\u6307\u9488(v \u4ee3\u8868 virtual&#xff0c;f\u4ee3\u8868 function)\u3002\u2f00\u4e2a\u542b\u6709\u865a\u51fd\u6570\u7684\u7c7b\u4e2d\u90fd\u81f3\u5c11\u90fd\u6709\u2f00\u4e2a\u865a\u51fd\u6570\u8868\u6307\u9488&#xff0c;\u56e0\u4e3a\u2f00\u4e2a\u7c7b\u6240\u6709\u865a\u51fd\u6570\u7684\u5730\u5740\u8981\u88ab\u653e\u5230\u8fd9\u4e2a\u7c7b\u5bf9\u8c61\u7684\u865a\u51fd\u6570\u8868\u4e2d&#xff0c;\u865a\u51fd\u6570\u8868\u4e5f\u7b80\u79f0\u865a\u8868\u3002<\/p>\n<ul>\n<li>\n<p>\u57fa\u7c7b\u5bf9\u8c61\u7684\u865a\u51fd\u6570\u8868\u4e2d\u5b58\u653e\u57fa\u7c7b\u6240\u6709\u865a\u51fd\u6570\u7684\u5730\u5740\u3002\u540c\u7c7b\u578b\u7684\u5bf9\u8c61\u5171\u7528\u540c\u2f00\u5f20\u865a\u8868&#xff0c;\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61\u5404\u81ea\u6709\u72ec\u7acb\u7684\u865a\u8868&#xff0c;\u6240\u4ee5\u57fa\u7c7b\u548c\u6d3e\u751f\u7c7b\u6709\u5404\u81ea\u72ec\u7acb\u7684\u865a\u8868\u3002<\/p>\n<\/li>\n<li>\n<p>\u6d3e\u751f\u7c7b\u7531\u4e24\u90e8\u5206\u6784\u6210&#xff0c;\u7ee7\u627f\u4e0b\u6765\u7684\u57fa\u7c7b\u548c\u81ea\u5df1\u7684\u6210\u5458&#xff0c;\u2f00\u822c\u60c5\u51b5\u4e0b&#xff0c;\u7ee7\u627f\u4e0b\u6765\u7684\u57fa\u7c7b\u4e2d\u6709\u865a\u51fd\u6570\u8868\u6307\u9488&#xff0c;\u81ea\u5df1\u5c31\u4e0d\u4f1a\u518d\u751f\u6210\u865a\u51fd\u6570\u8868\u6307\u9488\u3002\u4f46\u662f\u8981\u6ce8\u610f\u7684\u8fd9\u91cc\u7ee7\u627f\u4e0b\u6765\u7684\u57fa\u7c7b\u90e8\u5206\u865a\u51fd\u6570\u8868\u6307\u9488\u548c\u57fa\u7c7b\u5bf9\u8c61\u7684\u865a\u51fd\u6570\u8868\u6307\u9488\u4e0d\u662f\u540c\u2f00\u4e2a&#xff0c;\u5c31\u50cf\u57fa\u7c7b\u5bf9\u8c61\u7684\u6210\u5458\u548c\u6d3e\u751f\u7c7b\u5bf9\u8c61\u4e2d\u7684\u57fa\u7c7b\u5bf9\u8c61\u6210\u5458\u4e5f\u72ec\u7acb\u7684\u3002<\/p>\n<\/li>\n<li>\n<p>\u6d3e\u751f\u7c7b\u4e2d\u91cd\u5199\u7684\u57fa\u7c7b\u7684\u865a\u51fd\u6570&#xff0c;\u6d3e\u751f\u7c7b\u7684\u865a\u51fd\u6570\u8868\u4e2d\u5bf9\u5e94\u7684\u865a\u51fd\u6570\u5c31\u4f1a\u88ab\u8986\u76d6\u6210\u6d3e\u751f\u7c7b\u91cd\u5199\u7684\u865a\u51fd\u6570\u5730\u5740\u3002<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<p>\u6d3e\u751f\u7c7b\u7684\u865a\u51fd\u6570\u8868\u4e2d\u5305\u542b&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u57fa\u7c7b\u7684\u865a\u51fd\u6570\u5730\u5740&#xff0c;<\/p>\n<\/li>\n<li>\n<p>\u6d3e\u751f\u7c7b\u91cd\u5199\u7684\u865a\u51fd\u6570\u5730\u5740\u5b8c\u6210\u8986\u76d6&#xff0c;<\/p>\n<\/li>\n<li>\n<p>\u6d3e\u751f\u7c7b\u81ea\u5df1\u7684\u865a\u51fd\u6570\u5730\u5740\u4e09\u4e2a\u90e8\u5206\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u4e3e\u4e2a\u4f8b\u5b50&#xff1a;\u8fd9\u662f\u4e00\u4e2a\u57fa\u7c7b<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Base<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">func1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">func2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> data<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5bf9\u8c61\u5185\u5b58\u5e03\u5c40&#xff1a;<\/p>\n<p>&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<br \/>\n<span class=\"token operator\">|<\/span> vptr           <span class=\"token operator\">|<\/span> &#8212;<span class=\"token operator\">&gt;<\/span> \u6307\u5411Base\u7684\u865a\u51fd\u6570\u8868<br \/>\n<span class=\"token operator\">|<\/span> int data       <span class=\"token operator\">|<\/span><br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<\/p>\n<p>\u865a\u51fd\u6570\u8868\u5185\u5bb9&#xff1a;<\/p>\n<p>Base\u7684vtable&#xff1a;<br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<br \/>\n<span class=\"token operator\">|<\/span> <span class=\"token operator\">&amp;<\/span>Base::func1   <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span> <span class=\"token operator\">&amp;<\/span>Base::func2   <span class=\"token operator\">|<\/span><br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<\/p>\n<h4>\u865a\u51fd\u6570\u8868\u7684\u751f\u6210\u89c4\u5219<\/h4>\n<p>\u865a\u8868\u5728\u7f16\u8bd1\u671f\u95f4\u7531\u7f16\u8bd1\u5668\u751f\u6210&#xff0c;\u7a0b\u5e8f\u542f\u52a8\u65f6\u52a0\u8f7d\u5230\u5185\u5b58&#xff0c;\u751f\u547d\u5468\u671f\u4e0e\u7a0b\u5e8f\u4e00\u81f4\u3002<\/p>\n<p>\u5355\u7ee7\u627f\u573a\u666f<\/p>\n<p>\u6d3e\u751f\u7c7b\u7684\u865a\u51fd\u6570\u8868\u57fa\u4e8e\u57fa\u7c7b\u7684\u865a\u51fd\u6570\u8868\u6269\u5c55&#xff1a;<\/p>\n<ul>\n<li>\u82e5\u6d3e\u751f\u7c7b\u91cd\u5199\u57fa\u7c7b\u865a\u51fd\u6570&#xff0c;\u66ff\u6362\u8868\u4e2d\u5bf9\u5e94\u7684\u51fd\u6570\u6307\u9488\u3002<\/li>\n<li>\u82e5\u6d3e\u751f\u7c7b\u65b0\u589e\u865a\u51fd\u6570&#xff0c;\u8ffd\u52a0\u5230\u8868\u672b\u5c3e\u3002<\/li>\n<\/ul>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Derived<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Base<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">func1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span>  <span class=\"token comment\">\/\/ \u91cd\u5199\u57fa\u7c7b\u7684func1<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">func3<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span>   <span class=\"token comment\">\/\/ \u65b0\u589e\u865a\u51fd\u6570<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>Derived\u7684vtable&#xff1a;<\/p>\n<p>&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<br \/>\n<span class=\"token operator\">|<\/span> <span class=\"token operator\">&amp;<\/span>Derived::func1<span class=\"token operator\">|<\/span>  \/\/ \u91cd\u5199\u57fa\u7c7bfunc1<br \/>\n<span class=\"token operator\">|<\/span> <span class=\"token operator\">&amp;<\/span>Base::func2    <span class=\"token operator\">|<\/span>  \/\/ \u672a\u91cd\u5199&#xff0c;\u4fdd\u7559\u57fa\u7c7bfunc2<br \/>\n<span class=\"token operator\">|<\/span> <span class=\"token operator\">&amp;<\/span>Derived::func3<span class=\"token operator\">|<\/span>  \/\/ \u65b0\u589e\u865a\u51fd\u6570<br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<\/p>\n<p>\u591a\u91cd\u7ee7\u627f\u573a\u666f<\/p>\n<p>\u6bcf\u4e2a\u57fa\u7c7b\u5bf9\u5e94\u72ec\u7acb\u7684\u865a\u51fd\u6570\u8868&#xff0c;\u6d3e\u751f\u7c7b\u5408\u5e76\u6240\u6709\u57fa\u7c7b\u7684\u8868\u5e76\u8c03\u6574vptr\u504f\u79fb\u3002<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Base1<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">f1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Base2<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">f2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Derived<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Base1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Base2<\/span><\/span> <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 punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">f2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>Derived\u5bf9\u8c61\u5185\u5b58\u5e03\u5c40&#xff1a;<\/p>\n<p>&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<br \/>\n<span class=\"token operator\">|<\/span> Base1\u7684vptr     <span class=\"token operator\">|<\/span> &#8212;<span class=\"token operator\">&gt;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token operator\">&amp;<\/span>Derived::f1<span class=\"token punctuation\">]<\/span><br \/>\n<span class=\"token operator\">|<\/span> Base1\u6210\u5458\u53d8\u91cf   <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span> Base2\u7684vptr     <span class=\"token operator\">|<\/span> &#8212;<span class=\"token operator\">&gt;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token operator\">&amp;<\/span>Derived::f2<span class=\"token punctuation\">]<\/span><br \/>\n<span class=\"token operator\">|<\/span> Base2\u6210\u5458\u53d8\u91cf   <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span> Derived\u6210\u5458\u53d8\u91cf <span class=\"token operator\">|<\/span><br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<\/p>\n<h3>\u591a\u6001\u662f\u5982\u4f55\u5b9e\u73b0\u7684<\/h3>\n<p>\u591a\u6001&#xff08;Polymorphism&#xff09; \u4e3b\u8981\u901a\u8fc7 \u865a\u51fd\u6570&#xff08;virtual functions&#xff09; \u548c \u865a\u51fd\u6570\u8868&#xff08;vtable&#xff09; \u5b9e\u73b0&#xff0c;\u6838\u5fc3\u662f\u52a8\u6001\u7ed1\u5b9a&#xff08;Dynamic Binding&#xff09;\u3002<\/p>\n<h4>\u52a8\u6001\u7ed1\u5b9a\u548c\u9759\u6001\u7ed1\u5b9a<\/h4>\n<p>\u52a8\u6001\u7ed1\u5b9a&#xff08;Dynamic Binding&#xff09; \u548c \u9759\u6001\u7ed1\u5b9a&#xff08;Static Binding&#xff09; \u662f\u51fd\u6570\u8c03\u7528\u7684\u4e24\u79cd\u4e0d\u540c\u89e3\u6790\u673a\u5236&#xff0c;\u76f4\u63a5\u5f71\u54cd\u7a0b\u5e8f\u7684\u6267\u884c\u884c\u4e3a\u3002<\/p>\n<table>\n<tr>\u7279\u6027\u9759\u6001\u7ed1\u5b9a&#xff08;\u65e9\u7ed1\u5b9a&#xff09;\u52a8\u6001\u7ed1\u5b9a&#xff08;\u665a\u7ed1\u5b9a&#xff09;<\/tr>\n<tbody>\n<tr>\n<td>\u89e3\u6790\u65f6\u673a<\/td>\n<td>\u7f16\u8bd1\u65f6\u786e\u5b9a\u8c03\u7528\u7684\u5177\u4f53\u51fd\u6570<\/td>\n<td>\u8fd0\u884c\u65f6\u6839\u636e\u5bf9\u8c61\u5b9e\u9645\u7c7b\u578b\u786e\u5b9a\u8c03\u7528\u7684\u51fd\u6570<\/td>\n<\/tr>\n<tr>\n<td>\u5b9e\u73b0\u673a\u5236<\/td>\n<td>\u51fd\u6570\u5730\u5740\u76f4\u63a5\u786c\u7f16\u7801\u5230\u4ee3\u7801\u4e2d<\/td>\n<td>\u901a\u8fc7\u865a\u51fd\u6570\u8868&#xff08;vtable&#xff09;\u548c\u865a\u6307\u9488&#xff08;vptr&#xff09;\u52a8\u6001\u67e5\u627e<\/td>\n<\/tr>\n<tr>\n<td>\u6027\u80fd<\/td>\n<td>\u9ad8&#xff08;\u65e0\u8fd0\u884c\u65f6\u5f00\u9500&#xff09;<\/td>\n<td>\u8f83\u4f4e&#xff08;\u9700\u8981\u67e5\u8868\u548c\u95f4\u63a5\u8c03\u7528&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u7075\u6d3b\u6027<\/td>\n<td>\u4f4e&#xff08;\u56fa\u5b9a\u884c\u4e3a&#xff09;<\/td>\n<td>\u9ad8&#xff08;\u652f\u6301\u591a\u6001&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u5e94\u7528\u573a\u666f<\/td>\n<td>\u666e\u901a\u51fd\u6570\u3001\u975e\u865a\u6210\u5458\u51fd\u6570\u3001\u6a21\u677f\u51fd\u6570<\/td>\n<td>\u865a\u51fd\u6570&#xff08;\u591a\u6001\u8c03\u7528&#xff09;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u9759\u6001\u7ed1\u5b9a&#xff08;Static Binding&#xff09; \u5de5\u4f5c\u673a\u5236<\/p>\n<ul>\n<li>\u7f16\u8bd1\u65f6\u786e\u5b9a&#xff1a;\u7f16\u8bd1\u5668\u6839\u636e\u8c03\u7528\u8005\u7684 \u9759\u6001\u7c7b\u578b&#xff08;\u58f0\u660e\u7c7b\u578b&#xff09;\u76f4\u63a5\u7ed1\u5b9a\u51fd\u6570\u5730\u5740\u3002<\/li>\n<li>\u65e0\u8fd0\u884c\u65f6\u51b3\u7b56&#xff1a;\u65e0\u8bba\u5b9e\u9645\u5bf9\u8c61\u662f\u4ec0\u4e48\u7c7b\u578b&#xff0c;\u8c03\u7528\u7684\u51fd\u6570\u5728\u7f16\u8bd1\u65f6\u5df2\u56fa\u5b9a\u3002<\/li>\n<\/ul>\n<p>\u5178\u578b\u573a\u666f<\/p>\n<ul>\n<li>\u975e\u865a\u6210\u5458\u51fd\u6570\u8c03\u7528&#xff1a;<\/li>\n<\/ul>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Base<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">nonVirtualFunc<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Base\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Derived<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Base<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">nonVirtualFunc<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Derived\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><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> <span class=\"token punctuation\">{<\/span><br \/>\n    Base<span class=\"token operator\">*<\/span> obj <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token function\">Derived<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    obj<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">nonVirtualFunc<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8f93\u51fa &#034;Base&#034;&#xff08;\u9759\u6001\u7ed1\u5b9a&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">delete<\/span> obj<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>\u5bf9\u4e8e\u4e0a\u9762\u8fd9\u4e2a\u4f8b\u5b50&#xff1a;<\/p>\n<p>\u51fd\u6570\u672a\u58f0\u660e\u4e3a\u865a\u51fd\u6570<\/p>\n<ul>\n<li>Base \u7c7b\u7684 nonVirtualFunc() \u6ca1\u6709\u4f7f\u7528 virtual \u5173\u952e\u5b57&#xff0c;\u56e0\u6b64\u5b83\u662f\u4e00\u4e2a\u666e\u901a\u6210\u5458\u51fd\u6570&#xff0c;\u4e0d\u5177\u5907\u591a\u6001\u6027\u3002<\/li>\n<\/ul>\n<p>\u6307\u9488\u7c7b\u578b\u51b3\u5b9a\u8c03\u7528<\/p>\n<ul>\n<li>obj \u7684\u7c7b\u578b\u662f Base*&#xff0c;\u7f16\u8bd1\u5668\u5728\u7f16\u8bd1\u65f6\u6839\u636e\u6307\u9488\u7684\u9759\u6001\u7c7b\u578b&#xff08;\u5373 Base*&#xff09;\u786e\u5b9a\u8c03\u7528 Base::nonVirtualFunc() &#xff0c;\u4e0e\u6307\u9488\u5b9e\u9645\u6307\u5411\u7684\u5bf9\u8c61\u7c7b\u578b\u65e0\u5173\u3002<\/li>\n<\/ul>\n<p>\u6d3e\u751f\u7c7b\u51fd\u6570\u662f\u201c\u9690\u85cf\u201d\u800c\u975e\u201c\u91cd\u5199\u201d<\/p>\n<ul>\n<li>Derived \u7c7b\u4e2d\u7684 nonVirtualFunc() \u5e76\u672a\u8986\u76d6\u57fa\u7c7b\u51fd\u6570&#xff0c;\u800c\u662f\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540c\u540d\u51fd\u6570\u3002\u8fd9\u79cd\u73b0\u8c61\u79f0\u4e3a \u51fd\u6570\u9690\u85cf&#xff08;NameHiding&#xff09;\u3002<\/li>\n<li>\u82e5\u901a\u8fc7 Derived \u7c7b\u5bf9\u8c61\u6216\u6307\u9488\u8c03\u7528 nonVirtualFunc()&#xff0c;\u624d\u4f1a\u8c03\u7528\u6d3e\u751f\u7c7b\u7248\u672c\u3002<\/li>\n<li>\u901a\u8fc7\u57fa\u7c7b\u6307\u9488\u8c03\u7528\u65f6&#xff0c;\u53ea\u80fd\u8bbf\u95ee\u57fa\u7c7b\u7684\u51fd\u6570\u3002\u4e0d\u5177\u5907\u591a\u6001\u6027\u3002<\/li>\n<\/ul>\n<hr \/>\n<ul>\n<li>\u5168\u5c40\u51fd\u6570\u8c03\u7528&#xff1a;<\/li>\n<\/ul>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/* &#8230; *\/<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u9759\u6001\u7ed1\u5b9a<\/span><\/p>\n<ul>\n<li>\u6a21\u677f\u51fd\u6570\u5b9e\u4f8b\u5316&#xff1a;<\/li>\n<\/ul>\n<p><span class=\"token keyword\">template<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">typename<\/span> <span class=\"token class-name\">T<\/span><span class=\"token operator\">&gt;<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">templateFunc<\/span><span class=\"token punctuation\">(<\/span>T t<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/* &#8230; *\/<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token function\">templateFunc<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">42<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u7f16\u8bd1\u65f6\u751f\u6210\u9488\u5bf9int\u7684\u7248\u672c<\/span><\/p>\n<hr \/>\n<p>\u52a8\u6001\u7ed1\u5b9a&#xff08;Dynamic Binding&#xff09;<\/p>\n<p>\u5de5\u4f5c\u673a\u5236<\/p>\n<ul>\n<li>\u8fd0\u884c\u65f6\u786e\u5b9a&#xff1a;\u901a\u8fc7\u865a\u51fd\u6570\u8868&#xff08;vtable&#xff09;\u548c\u865a\u6307\u9488&#xff08;vptr&#xff09;\u52a8\u6001\u67e5\u627e\u51fd\u6570\u5730\u5740\u3002<\/li>\n<li>\u4f9d\u8d56\u865a\u51fd\u6570&#xff1a;\u53ea\u6709\u865a\u51fd\u6570&#xff08;\u6807\u8bb0\u4e3a virtual \u7684\u6210\u5458\u51fd\u6570&#xff09;\u652f\u6301\u52a8\u6001\u7ed1\u5b9a\u3002<\/li>\n<\/ul>\n<p>\u5178\u578b\u573a\u666f<\/p>\n<ul>\n<li>\u865a\u51fd\u6570\u8c03\u7528&#xff1a;<\/li>\n<\/ul>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Base<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">virtualFunc<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Base\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Derived<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Base<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">virtualFunc<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Derived\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><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> <span class=\"token punctuation\">{<\/span><br \/>\n    Base<span class=\"token operator\">*<\/span> obj <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token function\">Derived<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    obj<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">virtualFunc<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8f93\u51fa &#034;Derived&#034;&#xff08;\u52a8\u6001\u7ed1\u5b9a&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">delete<\/span> obj<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>&#8211; \u591a\u6001\u5bf9\u8c61\u9500\u6bc1&#xff1a;&#xff08;\u865a\u6790\u6784\u51fd\u6570&#xff09;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Base<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token operator\">~<\/span><span class=\"token function\">Base<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span>  <span class=\"token comment\">\/\/ \u865a\u6790\u6784\u51fd\u6570<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Derived<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Base<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token operator\">~<\/span><span class=\"token function\">Derived<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/* \u91ca\u653e\u6d3e\u751f\u7c7b\u8d44\u6e90 *\/<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>Base<span class=\"token operator\">*<\/span> obj <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token function\">Derived<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">delete<\/span> obj<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u52a8\u6001\u8c03\u7528~Derived()<\/span><\/p>\n<p>\u8fd9\u91cc\u6211\u4eec\u5c31\u53ef\u4ee5\u8bb2\u89e3\u865a\u6790\u6784\u51fd\u6570\u7684\u539f\u7406\u4e86&#xff0c;\u865a\u6790\u6784\u51fd\u6570\u901a\u8fc7\u52a8\u6001\u7ed1\u5b9a&#xff08;\u8fd0\u884c\u65f6\u591a\u6001&#xff09;\u786e\u4fdd\u8c03\u7528\u5b9e\u9645\u5bf9\u8c61\u7c7b\u578b\u7684\u6790\u6784\u51fd\u6570\u3002delete \u64cd\u4f5c\u7b26\u901a\u8fc7 vptr \u627e\u5230\u5b9e\u9645\u5bf9\u8c61\u7684\u6790\u6784\u51fd\u6570&#xff0c;\u5b9e\u73b0\u52a8\u6001\u8c03\u7528\u3002<\/p>\n<hr \/>\n<p>\u6790\u6784\u51fd\u6570\u7684\u8c03\u7528\u987a\u5e8f<\/p>\n<p>\u5f53\u9500\u6bc1\u4e00\u4e2a\u6d3e\u751f\u7c7b\u5bf9\u8c61\u65f6&#xff0c;\u6790\u6784\u51fd\u6570\u7684\u8c03\u7528\u987a\u5e8f\u662f \u201c\u4ece\u6d3e\u751f\u7c7b\u5230\u57fa\u7c7b\u201d \u7684\u9006\u5411\u6784\u9020\u987a\u5e8f&#xff1a;<\/p>\n<ul>\n<li>\u5148\u6267\u884c\u6d3e\u751f\u7c7b\u7684\u6790\u6784\u51fd\u6570&#xff1a;\u91ca\u653e\u6d3e\u751f\u7c7b\u72ec\u6709\u7684\u8d44\u6e90&#xff08;\u5982\u52a8\u6001\u5185\u5b58\u3001\u6587\u4ef6\u53e5\u67c4\u7b49&#xff09;\u3002<\/li>\n<li>\u81ea\u52a8\u8c03\u7528\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570&#xff1a;\u91ca\u653e\u57fa\u7c7b\u7684\u8d44\u6e90\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u79cd\u987a\u5e8f\u7531\u7f16\u8bd1\u5668\u81ea\u52a8\u7ba1\u7406&#xff0c;\u786e\u4fdd\u6240\u6709\u8d44\u6e90\u6309\u6b63\u786e\u987a\u5e8f\u91ca\u653e\u3002<\/p>\n<p>\u5982\u679c\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u6ca1\u6709\u88ab\u5b9a\u4e49\u4e3a\u865a\u51fd\u6570&#xff0c;\u90a3\u4e48\u5728\u6790\u6784\u65f6\u5c31\u4e0d\u4f1a\u89e6\u53d1\u52a8\u6001\u7ed1\u5b9a&#xff0c;\u5b9e\u9645\u4e0a\u4f1a\u901a\u8fc7\u9759\u6001\u7ed1\u5b9a\u76f4\u63a5\u6307\u5411\u8be5\u6307\u9488\u7684\u7c7b\u578b\u5bf9\u8c61&#xff0c;\u5373\u57fa\u7c7b&#xff0c;\u4ece\u800c\u53ea\u8c03\u7528\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570&#xff0c;\u91ca\u653e\u57fa\u7c7b\u7684\u8d44\u6e90&#xff0c;\u5bfc\u81f4\u6d3e\u751f\u7c7b\u7684\u6790\u6784\u51fd\u6570\u65e0\u6cd5\u88ab\u8c03\u7528&#xff0c;\u9020\u6210\u5185\u5b58\u6cc4\u6f0f\u7b49\u95ee\u9898\u3002<\/p>\n<p>\u770b\u5230\u8fd9\u91cc&#xff0c;\u76f8\u4fe1\u5927\u5bb6\u5df2\u7ecf\u660e\u767d\u4e86\u4e3a\u4ec0\u4e48\u6790\u6784\u51fd\u6570\u8981\u5b9a\u4e49\u4e3a\u865a\u51fd\u6570\u3002\u4e5f\u660e\u767d\u4e86\u591a\u6001\u7684\u6838\u5fc3\u673a\u5236\u2014\u2014\u52a8\u6001\u7ed1\u5b9a<\/p>\n<hr \/>\n<p>\u8fd8\u6709\u4e00\u4e2a\u503c\u5f97\u6ce8\u610f\u7684\u70b9\u662f&#xff1a;\u865a\u51fd\u6570\u7684\u9ed8\u8ba4\u53c2\u6570\u662f\u9759\u6001\u7ed1\u5b9a\u7684<\/p>\n<ul>\n<li>\u865a\u51fd\u6570\u7684\u9ed8\u8ba4\u53c2\u6570\u5728\u7f16\u8bd1\u65f6\u786e\u5b9a&#xff0c;\u4e0e\u52a8\u6001\u7ed1\u5b9a\u7684\u51fd\u6570\u4f53\u65e0\u5173<\/li>\n<\/ul>\n<p>\u518d\u770b\u6211\u4eec\u4e4b\u524d\u7684\u90a3\u9053\u9898&#xff0c;\u76f8\u4fe1\u73b0\u5728\u8fd9\u9053\u9898\u5bf9\u4f60\u6765\u8bf4\u5df2\u7ecf\u662f\u5c0f\u83dc\u4e00\u789f\u4e86<\/p>\n<p>\u4ee5\u4e0b\u7a0b\u5e8f\u8f93\u51fa\u7ed3\u679c\u662f\u4ec0\u4e48&#xff08;&#xff09;<\/p>\n<ul>\n<li>A: A-&gt;0<\/li>\n<li>B: B-&gt;1<\/li>\n<li>C: A-&gt;1<\/li>\n<li>D: B-&gt;0<\/li>\n<li>E: \u7f16\u8bd1\u51fa\u9519<\/li>\n<li>F: \u4ee5\u4e0a\u90fd\u4e0d\u6b63\u786e<\/li>\n<\/ul>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">A<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> val <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;A-&gt;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> val <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">test<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">B<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">A<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> val <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;B-&gt;&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> val <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><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 keyword\">int<\/span> argc<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>argv<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    B <span class=\"token operator\">*<\/span>p <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> B<span class=\"token punctuation\">;<\/span><br \/>\n    p<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">test<\/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>\u7ed3\u5408\u6211\u4eec\u4e0a\u9762\u8bb2\u5230\u7684\u77e5\u8bc6\u70b9&#xff0c;\u73b0\u5728\u5df2\u7ecf\u4e0d\u96be\u7406\u89e3&#xff0c;B\u91cd\u5199\u4e86A\u7684 func() \u865a\u51fd\u6570&#xff0c;\u5f53\u6267\u884c p-&gt;test() &#xff0c;\u8fd9\u53e5\u4ee3\u7801\u65f6&#xff0c;\u4f1a\u8c03\u7528B\u4e2d\u7ee7\u627f\u4e0b\u6765\u7684\u57fa\u7c7b\u7684 test() \u51fd\u6570&#xff0c;\u4ece\u800c\u6267\u884c func() \u51fd\u6570&#xff0c;\u7531\u4e8e\u7c7bB\u91cd\u5199\u4e86\u57fa\u7c7b\u7684 func() \u51fd\u6570&#xff0c;\u4f1a\u6839\u636e\u6307\u9488p\u6307\u5411\u7684\u5b9e\u9645\u7c7b\u578b&#xff0c;\u6267\u884c\u52a8\u6001\u7ed1\u5b9a&#xff0c;\u5b9e\u9645\u4e0a\u6267\u884c\u7684\u662fB\u4e2d\u91cd\u5199\u7684 func() \u51fd\u6570&#xff0c;\u4f46\u7531\u4e8e\u9ed8\u8ba4\u53c2\u6570\u662f\u9759\u6001\u7ed1\u5b9a&#xff0c;\u9ed8\u8ba4\u53c2\u6570\u7684\u53d6\u503c\u7531\u8c03\u7528\u65b9\u7684\u9759\u6001\u7c7b\u578b\u51b3\u5b9a&#xff0c;\u4e0e\u52a8\u6001\u7ed1\u5b9a\u7684\u51fd\u6570\u5b9e\u73b0\u65e0\u5173\u3002 test() \u51fd\u6570\u5728 A \u7c7b\u4e2d\u5b9a\u4e49&#xff0c;\u5176\u5185\u90e8\u7684 func() \u8c03\u7528\u6839\u636e A \u7684\u9759\u6001\u7c7b\u578b\u786e\u5b9a\u9ed8\u8ba4\u53c2\u6570\u4e3a 1\u3002\u5728\u7f16\u8bd1\u65f6\u5c31\u5df2\u7ecf\u786e\u5b9a\u4e86&#xff0c;\u6240\u4ee5 val \u7684\u503c\u662f\u57fa\u7c7b\u4e2d\u7684\u9ed8\u8ba4\u53c2\u6570\u7684\u503c&#xff0c;\u4e3a1\u3002<\/p>\n<p>\u5b8c\u6574\u7684\u8c03\u7528\u94fe&#xff1a;<\/p>\n<p>p<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">test<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> \u2192 <span class=\"token class-name\">A<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">test<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> \u2192 <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>&#xff08;\u52a8\u6001\u7ed1\u5b9a\u5230<span class=\"token class-name\">B<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>&#xff0c;\u4f46\u9ed8\u8ba4\u53c2\u6570\u6765\u81eaA\u7684\u58f0\u660e&#xff09;<\/p>\n<p>\u6240\u4ee5\u6700\u7ec8\u7684\u8f93\u51fa\u7ed3\u679c\u5c31\u662f&#xff1a; B-&gt;1<\/p>\n<p>\u52a8\u6001\u7ed1\u5b9a\u7684\u5b9e\u73b0\u4f9d\u8d56\u865a\u51fd\u6570\u8868<\/p>\n<p>\u771f\u5b9e\u6d41\u7a0b&#xff1a;<\/p>\n<ul>\n<li>\u901a\u8fc7\u5b9e\u9645\u6307\u5411\u7684\u5bf9\u8c61\u627e\u5230 vptr\u3002<\/li>\n<li>\u901a\u8fc7 vptr \u627e\u5230\u865a\u51fd\u6570\u8868\u3002<\/li>\n<li>\u6839\u636e\u51fd\u6570\u5728\u8868\u4e2d\u7684\u4f4d\u7f6e\u8c03\u7528\u5b9e\u9645\u51fd\u6570\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u865a\u51fd\u6570\u8868\u7684\u4f4d\u7f6e<\/h3>\n<p>\u6700\u540e\u8865\u5145\u4e00\u4e2a\u77e5\u8bc6\u70b9&#xff0c;\u672c\u8d28\u4e0a\u865a\u51fd\u6570\u4e5f\u662f\u51fd\u6570&#xff0c;\u7f16\u8bd1\u540e\u4e5f\u662f\u4e00\u6bb5\u6307\u4ee4&#xff0c;\u865a\u51fd\u6570\u7684\u5730\u5740\u653e\u5728\u4e86\u5bf9\u8c61\u7684\u865a\u51fd\u6570\u8868\u4e2d&#xff0c;\u90a3\u4e48\u865a\u51fd\u6570\u8868\u5b58\u653e\u5728\u54ea\u91cc\u5462&#xff1f;<\/p>\n<p>\u5173\u4e8e\u865a\u51fd\u6570\u8868\u7684\u5b58\u653e\u4f4d\u7f6e&#xff0c;C&#043;&#043;\u6807\u51c6\u5e76\u6ca1\u6709\u660e\u786e\u89c4\u5b9a&#xff0c;\u662f\u4ea4\u7ed9\u7f16\u8bd1\u5668\u6765\u5b9e\u73b0\u7684&#xff0c;\u4e0d\u540c\u7684\u7f16\u8bd1\u5668\u5b9e\u73b0\u53ef\u80fd\u4e0d\u540c&#xff0c;\u4f46\u662f\u4e00\u822c\u60c5\u51b5\u90fd\u5b58\u653e\u5728\u7a0b\u5e8f\u7684\u53ea\u8bfb\u6570\u636e\u6bb5&#xff08;.rodata&#xff09;&#xff0c; \u865a\u51fd\u6570\u8868\u7684\u5185\u5bb9\u5728\u7f16\u8bd1\u671f\u5c31\u5df2\u786e\u5b9a&#xff0c;\u4e14\u5728\u8fd0\u884c\u65f6\u4e0d\u53ef\u4fee\u6539&#xff0c;\u9002\u5408\u5b58\u653e\u5728\u53ea\u8bfb\u5185\u5b58\u4e2d\u3002<\/p>\n<p>\u901a\u8fc7\u5982\u4e0b\u4ee3\u7801\u9a8c\u8bc1&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Base<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">func1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Base::func1&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">func2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Base::func2&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">func5<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Base::func5&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">protected<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Derive<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Base<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u91cd\u5199\u57fa\u7c7b\u7684func1<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">func1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Derive::func1&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">func3<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Derive::func1&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">func4<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Derive::func4&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">protected<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> b <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><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> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> j <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span>p1 <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>p2 <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;xxxxxxxx&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6808:%p\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u9759\u6001\u533a:%p\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>j<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5806:%p\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> p1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5e38\u91cf\u533a:%p\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> p2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    Base b<span class=\"token punctuation\">;<\/span><br \/>\n    Derive d<span class=\"token punctuation\">;<\/span><br \/>\n    Base <span class=\"token operator\">*<\/span>p3 <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&amp;<\/span>b<span class=\"token punctuation\">;<\/span><br \/>\n    Derive <span class=\"token operator\">*<\/span>p4 <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&amp;<\/span>d<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Person\u865a\u8868\u5730\u5740:%p\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>p3<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Student\u865a\u8868\u5730\u5740:%p\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>p4<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u865a\u51fd\u6570\u5730\u5740:%p\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>Base<span class=\"token double-colon punctuation\">::<\/span>func1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u666e\u901a\u51fd\u6570\u5730\u5740:%p\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>Base<span class=\"token double-colon punctuation\">::<\/span>func5<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>Visual Studio 2022\u5e73\u53f0\u4e0b\u8f93\u51fa&#xff1a;<\/p>\n<p>\u6808:010FF954<br \/>\n\u9759\u6001\u533a:0071D000<br \/>\n\u5806:0126D740<br \/>\n\u5e38\u91cf\u533a:0071ABA4<br \/>\nPerson\u865a\u8868\u5730\u5740:0071AB44<br \/>\nStudent\u865a\u8868\u5730\u5740:0071AB84<br \/>\n\u865a\u51fd\u6570\u5730\u5740:00711488<br \/>\n\u666e\u901a\u51fd\u6570\u5730\u5740:007114BF<\/p>\n<p>\u5728 Visual Studio 2022 \u5e73\u53f0\u4e0b\u865a\u51fd\u6570\u8868\u662f\u5b58\u50a8\u5728\u5e38\u91cf\u533a\u7684\u3002<\/p>\n<hr \/>\n<h2>\u603b\u7ed3\u591a\u6001\u8c03\u7528<\/h2>\n<p>&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<br \/>\n<span class=\"token operator\">|<\/span>                      \u591a\u6001\u5b9e\u73b0\u6d41\u7a0b\u603b\u7ed3                          <span class=\"token operator\">|<\/span><br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<br \/>\n<span class=\"token operator\">|<\/span>                                                                <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span> <span class=\"token number\">1<\/span>. \u5b9a\u4e49\u57fa\u7c7b\u865a\u51fd\u6570                                              <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    &#8211; \u57fa\u7c7b\u4e2d\u58f0\u660e\u865a\u51fd\u6570: virtual void func<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                    <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>                                                                <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span> <span class=\"token number\">2<\/span>. \u6d3e\u751f\u7c7b\u91cd\u5199\u865a\u51fd\u6570                                            <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    &#8211; \u6d3e\u751f\u7c7b\u4e2d override: void func<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> override<span class=\"token punctuation\">;<\/span>                  <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>                                                                <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span> <span class=\"token number\">3<\/span>. \u7f16\u8bd1\u5668\u751f\u6210\u865a\u51fd\u6570\u8868&#xff08;vtable&#xff09;                                <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    &#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#043;                               <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    <span class=\"token operator\">|<\/span> \u57fa\u7c7b vtable               <span class=\"token operator\">|<\/span>                               <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    <span class=\"token operator\">|<\/span> &#8211; <span class=\"token operator\">&amp;<\/span>Base::func             <span class=\"token operator\">|<\/span>                               <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    &#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#043;                               <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    <span class=\"token operator\">|<\/span> \u6d3e\u751f\u7c7b vtable             <span class=\"token operator\">|<\/span>                               <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    <span class=\"token operator\">|<\/span> &#8211; <span class=\"token operator\">&amp;<\/span>Derived::func          <span class=\"token operator\">|<\/span> <span class=\"token punctuation\">(<\/span>\u91cd\u5199\u540e\u66ff\u6362\u57fa\u7c7b\u5730\u5740<span class=\"token punctuation\">)<\/span>          <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    &#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#043;                               <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>                                                                <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span> <span class=\"token number\">4<\/span>. \u5bf9\u8c61\u5185\u5b58\u5e03\u5c40                                                <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    &#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#043;                               <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    <span class=\"token operator\">|<\/span> vptr                      <span class=\"token operator\">|<\/span> &#8212;<span class=\"token operator\">&gt;<\/span> \u6307\u5411 vtable               <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    <span class=\"token operator\">|<\/span> \u57fa\u7c7b\u6210\u5458\u53d8\u91cf              <span class=\"token operator\">|<\/span>                               <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    <span class=\"token operator\">|<\/span> \u6d3e\u751f\u7c7b\u6210\u5458\u53d8\u91cf            <span class=\"token operator\">|<\/span>                               <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    &#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#043;                               <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    <span class=\"token punctuation\">(<\/span>vptr \u5728\u5bf9\u8c61\u5185\u5b58\u9996\u90e8&#xff0c;\u5360 <span class=\"token number\">4<\/span>\/8 \u5b57\u8282<span class=\"token punctuation\">)<\/span>                         <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>                                                                <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span> <span class=\"token number\">5<\/span>. \u52a8\u6001\u7ed1\u5b9a\u8fc7\u7a0b&#xff08;\u8fd0\u884c\u65f6&#xff09;                                      <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    &#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    <span class=\"token operator\">|<\/span> \u901a\u8fc7\u57fa\u7c7b\u6307\u9488\u8c03\u7528\u865a\u51fd\u6570: obj-<span class=\"token operator\">&gt;<\/span>func<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                      <span class=\"token operator\">||<\/span><br \/>\n<span class=\"token operator\">|<\/span>    <span class=\"token operator\">|<\/span>                                                          <span class=\"token operator\">||<\/span><br \/>\n<span class=\"token operator\">|<\/span>    <span class=\"token operator\">|<\/span> a. \u8bbf\u95ee obj \u7684 vptr                                      <span class=\"token operator\">||<\/span><br \/>\n<span class=\"token operator\">|<\/span>    <span class=\"token operator\">|<\/span> b. \u901a\u8fc7 vptr \u627e\u5230 vtable                                 <span class=\"token operator\">||<\/span><br \/>\n<span class=\"token operator\">|<\/span>    <span class=\"token operator\">|<\/span> c. \u67e5\u8868\u8c03\u7528\u5b9e\u9645\u51fd\u6570\u5730\u5740 <span class=\"token operator\">&amp;<\/span>Derived::func                   <span class=\"token operator\">||<\/span><br \/>\n<span class=\"token operator\">|<\/span>    &#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>                                                                <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span> <span class=\"token number\">6<\/span>. \u865a\u6790\u6784\u51fd\u6570\u4fdd\u969c                                              <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    &#8211; \u57fa\u7c7b\u58f0\u660e\u865a\u6790\u6784\u51fd\u6570: virtual ~Base<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>                       <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    &#8211; \u6d3e\u751f\u7c7b\u6790\u6784\u51fd\u6570\u81ea\u52a8\u91cd\u5199                                    <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>    &#8211; delete \u57fa\u7c7b\u6307\u9488\u65f6&#xff0c;\u89e6\u53d1\u5b8c\u6574\u6790\u6784\u94fe                         <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span>                                                                <span class=\"token operator\">|<\/span><br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<\/p>\n<p>C&#043;&#043;\u591a\u6001\u901a\u8fc7\u865a\u51fd\u6570\u8868\u548c\u52a8\u6001\u7ed1\u5b9a\u673a\u5236\u5b9e\u73b0&#xff0c;\u5141\u8bb8\u57fa\u7c7b\u6307\u9488\u6216\u5f15\u7528\u5728\u8fd0\u884c\u65f6\u6839\u636e\u5b9e\u9645\u5bf9\u8c61\u7c7b\u578b\u8c03\u7528\u5bf9\u5e94\u7684\u6d3e\u751f\u7c7b\u65b9\u6cd5&#xff1a;\u7f16\u8bd1\u5668\u4e3a\u6bcf\u4e2a\u542b\u865a\u51fd\u6570\u7684\u7c7b\u751f\u6210\u865a\u51fd\u6570\u8868&#xff08;\u5b58\u50a8\u51fd\u6570\u5730\u5740&#xff09;&#xff0c;\u5bf9\u8c61\u5185\u7f6e\u865a\u8868\u6307\u9488&#xff08;vptr&#xff09;\u6307\u5411\u6240\u5c5e\u7c7b\u7684\u865a\u8868&#xff0c;\u5f53\u901a\u8fc7\u57fa\u7c7b\u6307\u9488\u8c03\u7528\u865a\u51fd\u6570\u65f6&#xff0c;\u7a0b\u5e8f\u901a\u8fc7 vptr \u67e5\u8868\u5b9a\u4f4d\u5b9e\u9645\u51fd\u6570\u5730\u5740&#xff0c;\u5b9e\u73b0\u8fd0\u884c\u65f6\u51b3\u8bae&#xff0c;\u540c\u65f6\u865a\u6790\u6784\u51fd\u6570\u786e\u4fdd\u5bf9\u8c61\u9500\u6bc1\u65f6\u6b63\u786e\u8c03\u7528\u6d3e\u751f\u7c7b\u6790\u6784\u903b\u8f91&#xff0c;\u4ece\u800c\u652f\u6301\u9762\u5411\u5bf9\u8c61\u4e2d&#034;\u540c\u4e00\u63a5\u53e3&#xff0c;\u591a\u79cd\u5b9e\u73b0&#034;\u7684\u6838\u5fc3\u7279\u6027\u3002<\/p>\n<hr \/>\n<h2>\u5199\u5728\u6700\u540e<\/h2>\n<p>\u672c\u6587\u5230\u8fd9\u91cc\u5c31\u7ed3\u675f\u4e86&#xff0c;\u6709\u5173C&#043;&#043;\u66f4\u6df1\u5165\u7684\u8bb2\u89e3&#xff0c;\u8fd8\u6709\u66f4\u591a\u7684\u6587\u7ae0\u4e3a\u5927\u5bb6\u8bb2\u89e3&#xff0c;\u656c\u8bf7\u671f\u5f85&#xff01;\u611f\u8c22\u60a8\u7684\u89c2\u770b&#xff01;<\/p>\n<p>\u5982\u679c\u4f60\u89c9\u5f97\u8fd9\u7bc7\u6587\u7ae0\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9&#xff0c;\u8bf7\u4e3a\u6211\u7684\u535a\u5ba2 \u70b9\u8d5e&#x1f44d;\u6536\u85cf\u2b50\ufe0f \u8bc4\u8bba&#x1f4ac;\u6216 \u5206\u4eab&#x1f517; \u652f\u6301\u4e00\u4e0b&#xff01;\u4f60\u7684\u6bcf\u4e00\u4e2a\u652f\u6301\u90fd\u662f\u6211\u7ee7\u7eed\u521b\u4f5c\u7684\u52a8\u529b\u2728&#xff01;&#x1f64f; \u5982\u679c\u4f60\u6709\u4efb\u4f55\u95ee\u9898\u6216\u60f3\u6cd5&#xff0c;\u4e5f\u6b22\u8fce \u7559\u8a00&#x1f4ac; \u4ea4\u6d41&#xff0c;\u4e00\u8d77\u8fdb\u6b65&#x1f4da;&#xff01;\u2764\ufe0f \u611f\u8c22\u4f60\u7684\u9605\u8bfb\u548c\u652f\u6301&#x1f31f;&#xff01;&#x1f389; \u795d\u5404\u4f4d\u5927\u4f6c\u5403\u5f97\u9971&#x1f356;&#xff0c;\u7761\u5f97\u597d&#x1f6cc;&#xff0c;\u65e5\u6709\u6240\u5f97&#x1f4c8;&#xff0c;\u9010\u68a6\u626c\u5e06\u26f5&#xff01;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb6.6k\u6b21\uff0c\u70b9\u8d5e152\u6b21\uff0c\u6536\u85cf165\u6b21\u3002C++ \u591a\u6001\uff0c\u4f5c\u4e3a\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u6838\u5fc3\u7279\u6027\uff0c\u5b83\u901a\u8fc7\u9759\u6001\u591a\u6001\u548c\u52a8\u6001\u591a\u6001\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u7f16\u7a0b\u624b\u6bb5\u3002\u6df1\u5165\u7406\u89e3\u591a\u6001\u7684\u539f\u7406\u548c\u5e94\u7528\u573a\u666f\uff0c\u80fd\u591f\u5e2e\u52a9\u6211\u4eec\u5199\u51fa\u66f4\u52a0\u9ad8\u6548\u3001\u7075\u6d3b\u548c\u53ef\u7ef4\u62a4\u7684 C++ \u4ee3\u7801\uff0c\u5e0c\u671b\u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd\uff0c\u4f60\u5bf9 C++ \u591a\u6001\u6709\u4e86\u66f4\u6df1\u5165\u7684\u8ba4\u8bc6\uff0c\u80fd\u591f\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\u5145\u5206\u53d1\u6325\u8fd9\u4e00\u7279\u6027\u7684\u4f18\u52bf\u3002<\/p>\n","protected":false},"author":2,"featured_media":44820,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,4224,174,190],"topic":[],"class_list":{"0":"post-44824","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-server","8":"tag-c","9":"tag-c-","11":"tag-190"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u3010C++ \u591a\u6001\u3011\u2014\u2014 \u793c\u5668\u4e5d\u9f0e\uff0c\u91c9\u4e0b\u4e7e\u5764\uff0c\u591a\u6001\u4e2d\u7684 \u201c\u98ce\u6c34\u5bfb\u9f99\u8bc0\u201c - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/44824.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010C++ \u591a\u6001\u3011\u2014\u2014 \u793c\u5668\u4e5d\u9f0e\uff0c\u91c9\u4e0b\u4e7e\u5764\uff0c\u591a\u6001\u4e2d\u7684 \u201c\u98ce\u6c34\u5bfb\u9f99\u8bc0\u201c - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb6.6k\u6b21\uff0c\u70b9\u8d5e152\u6b21\uff0c\u6536\u85cf165\u6b21\u3002C++ 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content=\"2025-06-20T22:05:32+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250620220530-6855db2a50a6f.gif\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"13 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/44824.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/44824.html\",\"name\":\"\u3010C++ \u591a\u6001\u3011\u2014\u2014 \u793c\u5668\u4e5d\u9f0e\uff0c\u91c9\u4e0b\u4e7e\u5764\uff0c\u591a\u6001\u4e2d\u7684 \u201c\u98ce\u6c34\u5bfb\u9f99\u8bc0\u201c - 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