{"id":617,"date":"2023-03-08T22:20:28","date_gmt":"2023-03-08T14:20:28","guid":{"rendered":"http:\/\/72.44.76.42\/?p=617"},"modified":"2023-05-29T14:16:31","modified_gmt":"2023-05-29T06:16:31","slug":"c%e7%9a%84%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e7%a8%8b%e5%ba%8f%e8%ae%be%e8%ae%a1","status":"publish","type":"post","link":"https:\/\/www.notown.top\/?p=617","title":{"rendered":"C++\u7684\u9762\u5411\u5bf9\u8c61\u7a0b\u5e8f\u8bbe\u8ba1"},"content":{"rendered":"\n<ul class=\"has-black-color has-text-color wp-block-list\"><li><strong>\u9762\u5411\u8fc7\u7a0b<\/strong>\uff1a\u4ee3\u7801\u548c\u6570\u636e\u5206\u79bb\u3001\u5206\u6790\u89e3\u51b3\u95ee\u9898\u7684<strong>\u6b65\u9aa4<\/strong>\u518d\u4e00\u6b65\u6b65\u5b9e\u73b0<ul><li>\u4f18\u70b9\uff1a<strong>\u6027\u80fd\u9ad8\uff0c\u80fd\u5feb\u901f\u5f00\u53d1<\/strong><\/li><li>\u7f3a\u70b9\uff1a\u96be\u6269\u5c55\uff0c\u96be\u7ef4\u62a4\uff0c\u8026\u5408\u5ea6\u9ad8<\/li><\/ul><\/li><li><strong>\u9762\u5411\u5bf9\u8c61<\/strong>\uff1a\u627e\u51fa\u95ee\u9898\u4e2d\u7684\u5bf9\u8c61\uff0c\u5b9e\u73b0\u5bf9\u8c61\u95f4\u7684\u4ea4\u4e92\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u53ea\u7ba1\u81ea\u5df1\u7684\u4e8b\uff0c\u80fd\u7ee7\u627f\u91cd\u590d\u7684\u884c\u4e3a\u548c\u5c5e\u6027<ul><li>\u4f18\u70b9\uff1a<strong>\u6613\u7ef4\u62a4\uff0c\u6613\u590d\u7528\uff0c\u6613\u62d3\u5c55\uff0c\u8026\u5408\u5ea6\u4f4e<\/strong><\/li><li>\u7f3a\u70b9\uff1a\u6027\u80fd\u6bd4\u9762\u5411\u5bf9\u8c61\u4f4e<\/li><\/ul><\/li><li>\u865a\u51fd\u6570\uff1a\u57fa\u7c7b\u5e0c\u671b\u5b83\u7684\u6d3e\u751f\u7c7b\u81ea\u5b9a\u4e49\u9002\u5408\u81ea\u8eab\u7684\u7248\u672c\u7684\u51fd\u6570<\/li><li>\u52a8\u6001\u7ed1\u5b9a\uff1a\u51fd\u6570\u5f62\u53c2\u4f7f\u7528\u57fa\u7c7b\u7684\u6307\u9488\u6216\u5f15\u7528\uff0c\u51fd\u6570\u7684\u5b9e\u9645\u6267\u884c\u7248\u672c\u7531\u4f20\u5165\u7684\u5b9e\u53c2\u786e\u5b9a\uff0c\u5373\u8fd0\u884c\u65f6\u7ed1\u5b9a<\/li><\/ul>\n\n\n\n<p>\u9762\u5411\u5bf9\u8c61<strong>\u4e09\u5927\u7279\u5f81<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>\u5c01\u88c5<\/strong>\uff1a\u5c06<strong>\u6570\u636e\u548c\u65b9\u6cd5\u96c6\u5408<\/strong>\u5728\u4e00\u4e2a\u5355\u5143\uff08\u7c7b\uff09\u4e2d\uff0c\u6545\u7c7b\u53ef\u4ee5\u6210\u4e3a\u4e00\u4e2a\u529f\u80fd\u72ec\u7acb\u7684\u6a21\u5757<\/li><li><strong>\u7ee7\u627f<\/strong>\uff1a\u5728\u57fa\u7c7b\u7684\u57fa\u7840\u4e0a\u521b\u5efa\u6d3e\u751f\u7c7b\uff0c<strong>\u6d3e\u751f\u7c7b\u7ee7\u627f\u57fa\u7c7b\u7684\u529f\u80fd\uff0c\u5e76\u80fd\u6269\u5145\u4fee\u6539<\/strong>\uff0c\u5b9e\u73b0\u91cd\u7528\u4ee3\u7801<\/li><li><strong>\u591a\u6001<\/strong>\uff1a\u9759\u6001\u591a\u6001\u6307\u51fd\u6570\u91cd\u8f7d\uff0c\u52a8\u6001\u591a\u6001\u6307\u4f20\u5165\u57fa\u7c7b\u6307\u9488\u6216\u5f15\u7528\uff0c\u6839\u636e\u5b9e\u9645\u6240\u6307\u5411\u7684\u5bf9\u8c61\u6267\u884c\u76f8\u5e94\u51fd\u6570\uff0c\u5373\u901a\u8fc7<strong>\u4e00\u4e2a\u63a5\u53e3\u5b9e\u73b0\u591a\u4e2a\u65b9\u6cd5<\/strong>\u3002<\/li><\/ul>\n\n\n\n<p>\u5728C++\u8bed\u8a00\u4e2d\uff0c\u5f53\u6211\u4eec\u4f7f\u7528<strong>\u57fa\u7c7b\u5f15\u7528\u6216\u6307\u9488\u8c03\u7528\u4e00\u4e2a\u865a\u51fd\u6570<\/strong>\u65f6\uff0c\u5c06\u53d1\u751f<strong>\u52a8\u6001\u7ed1\u5b9a<\/strong><br><strong>NOTE\uff1a \u57fa\u7c7b\u901a\u5e38\u5b9a\u4e49\u4e00\u4e2a\u865a\u6790\u6784\u51fd\u6570\uff0c\u5373\u4f7f\u8be5\u51fd\u6570\u4e0d\u6267\u884c\u4efb\u4f55\u5b9e\u9645\u64cd\u4f5c<\/strong><br>\u56e0\u4e3a\u5982\u679c\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u4e0d\u662f\u865a\u51fd\u6570\u3002\u5219delete\u4e00\u4e2a\u6307\u5411\u6d3e\u751f\u7c7b\u7684\u57fa\u7c7b\u6307\u9488<strong>\u5c06\u4ea7\u751f\u672a\u5b9a\u4e49\u7684\u884c\u4e3a<\/strong>\uff01<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class B{};\/\/B\u662f\u57fa\u7c7b\uff0c\u4f1a\u5408\u6210\u9ed8\u8ba4\u6790\u6784\uff0c\u4f46\u4e0d\u662f\u865a\u6790\u6784\u51fd\u6570\nclass C : public B {}\/\/ C\u7ee7\u627f\u81eaB\nC *c = new C;\nB *t = c;\/\/\u57fa\u7c7b\u6307\u9488\u6307\u5411\u6d3e\u751f\u7c7b\ndelete t;\/\/t\u7684\u52a8\u6001\u7c7b\u578b\u662f\u6d3e\u751f\u7c7b\uff0c\u9759\u6001\u7c7b\u578b\u662f\u57fa\u7c7b\u6307\u9488\uff0c\u8fd9\u91cc\u4f1a\u4ea7\u751f\u672a\u5b9a\u4e49\u884c\u4e3a<\/code><\/pre>\n\n\n\n<p><strong>\u6d3e\u751f\u7c7b\u7684\u6790\u6784\u51fd\u6570\u53ea\u8d1f\u8d23\u9500\u6bc1\u6d3e\u751f\u7c7b\u81ea\u5df1\u5206\u914d\u7684\u6210\u5458<\/strong>\uff0c\u4f46\u5728<strong>\u6d3e\u751f\u7c7b\u7684\u79fb\u52a8\u548c\u62f7\u8d1d\u64cd\u4f5c\u4e2d\u8fd8\u8981\u79fb\u52a8\u548c\u62f7\u8d1d\u57fa\u7c7b\u90e8\u5206\u7684\u6210\u5458<\/strong>\uff0c\u53ef\u4ee5\u50cf\u59d4\u6258\u6784\u9020\u4e00\u6837\u5728\u51fd\u6570\u5706\u62ec\u5f27\u540e\u9762\u4f7f\u7528\u5192\u53f7\uff0c\u7136\u540e\u5c31\u8c03\u7528\u57fa\u7c7b\u7684\u79fb\u52a8\u62f7\u8d1d\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>\u4efb\u4f55\u6784\u9020\u51fd\u6570\u4e4b\u5916\u7684\u975e\u9759\u6001\u51fd\u6570\u90fd\u53ef\u4ee5\u662f\u865a\u51fd\u6570\uff01\uff08\u58f0\u660e\u4e3a\u865a\u51fd\u6570\u65e0\u975e\u662f\u60f3\u4f7f\u7528\u57fa\u7c7b\u7684\u6307\u9488\u6216\u5f15\u7528\u6765\u8c03\u7528\u6d3e\u751f\u7c7b\u7684\u81ea\u5b9a\u4e49\u64cd\u4f5c\uff0c\u5373\u8be5\u5bf9\u8c61\u5df2\u7ecf\u5b58\u5728\u4e86\u6ca1\u6709\u6784\u9020\u7684\u5fc5\u8981\uff09<br>virtual\u53ea\u80fd\u7528\u4e8e\u7c7b\u5185\u58f0\u660e\u65e0\u975e\u7528\u4e8e\u7c7b\u5916\u90e8\u5b9a\u4e49<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class BasicTank{\npublic:\n    int x;\n    int y;\n    string name;\n    BasicTank(const char s&#91;] = \"sb\") : name(s) {}\n    virtual ~BasicTank() = default;\n    virtual void move() {\/\/\u57fa\u7c7b\u7684\u865a\u51fd\u6570\u5b9e\u73b0move\u4e3ax\uff0cy\u6bcf\u6b21\u52a01\n        cout &lt;&lt; \"origin: \"  &lt;&lt; getPosStr() &lt;&lt; endl;\n        ++x;\n        ++y;\n        cout &lt;&lt; \"curr: \"  &lt;&lt; getPosStr() &lt;&lt; endl;\n    };\n\n    string getPosStr(){\n        char temp&#91;100];\n        sprintf(temp,\"x: %d, y: %d\", x, y);\n        return temp;\n    }\n};\n\nclass FlyTank : public BasicTank{\/\/\u7c7b\u6d3e\u751f\u5217\u8868\u4e2d\uff0c\u57fa\u7c7b\u524d\u9762\u7684public\u8868\u660e\u4ece\u57fa\u7c7b\u7ee7\u627f\u6765\u7684\u6210\u5458\u5bf9\u6d3e\u751f\u7c7b\u7528\u6237\u53ef\u89c1\npublic:\n    FlyTank(const char s&#91;] = \"sb\") :BasicTank(s) {  }\/\/\u4f7f\u7528\u57fa\u7c7b\u6784\u9020\u51fd\u6570\u6765\u8f85\u52a9\u6784\u9020\u6d3e\u751f\u7c7b\n    \/\/\u4e00\u4e2a\u6d3e\u751f\u7c7b\u7684\u51fd\u6570\u5982\u679c\u8986\u76d6\u4e86\u67d0\u4e2a\u7ee7\u627f\u800c\u6765\u7684\u865a\u51fd\u6570\uff0c\u5219\u5b83\u7684\u5f62\u53c2\u7c7b\u578b\u548c\u8fd4\u56de\u7c7b\u578b\u5e94\u8be5\u4e0e\u88ab\u5b83\u8986\u76d6\u7684\u57fa\u7c7b\u51fd\u6570\u4e00\u81f4\uff08\u4f46\u5f53\u865a\u51fd\u6570\u8fd4\u56de\u7c7b\u578b\u662f\u7c7b\u672c\u8eab\u7684\u5f15\u7528\u6216\u6307\u9488\u65f6\uff0c\u53ef\u4ee5\u5404\u8fd4\u56de\u5404\u7684\uff0c\u5982D\u7ee7\u627f\u81eaB\uff0cB\u7684\u865a\u51fd\u6570\u8fd4\u56deB*\uff0c\u800c\u5bf9\u5e94\u7684D\u7684\u865a\u51fd\u6570\u53ef\u4ee5\u8fd4\u56deD*\u3002\n    void move() override{\/\/ \u91cd\u5199\u540e\u4e3a\u6bcf\u6b21x+2\uff0cy+3\n        cout &lt;&lt; \"origin: \"  &lt;&lt; getPosStr() &lt;&lt; endl;\n        x+=2;\n        y+=3;\n        cout &lt;&lt; \"curr: \"  &lt;&lt; getPosStr() &lt;&lt; endl;\n    }\n};\n\nvoid getNextStep(BasicTank &amp;tank){\n    cout &lt;&lt; tank.name &lt;&lt; endl;\n    tank.move();\/\/\u8fd9\u91cc\u5c06\u6839\u636etank\u7684\u5b9e\u53c2\u7c7b\u578b\u52a8\u6001\u9009\u62e9move\u51fd\u6570\n}\n\nBasicTank a(\"hacker\");\nFlyTank b(\"monster\");\ngetNextStep(a);\/\/\u6267\u884c\u57fa\u7c7b\u7684move\ngetNextStep(b);\/\/\u6267\u884c\u6d3e\u751f\u7c7b\u7684move<\/code><\/pre>\n\n\n\n<p>\u4e0a\u9762getNextStep\u51fd\u6570\u4f20\u53c2\u65f6\u4e4b\u6240\u4ee5\u5b58\u5728\u6d3e\u751f\u7c7b\u5411\u57fa\u7c7b\u7c7b\u578b\u7684\u8f6c\u6362\u662f\u56e0\u4e3a\u6bcf\u4e2a\u6d3e\u751f\u7c7b\u5bf9\u8c61\u90fd\u5305\u542b\u4e00\u4e2a\u57fa\u7c7b\u90e8\u5206\uff0c\u4f46<strong>\u4e0d\u5b58\u5728\u4ece\u57fa\u7c7b\u5230\u6d3e\u751f\u7c7b\u7684\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362<\/strong>\uff01\u56e0\u6b64\u4e0b\u9762\u4ee3\u7801\u662f\u4e0d\u5408\u6cd5\u7684:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>BasicTank *t = &amp;b;\nFlyTank *pt = t;\/\/\u975e\u6cd5\uff0c\u5373\u4f7ft\u7ed1\u5728\u4e00\u4e2a\u6d3e\u751f\u7c7b\u7684\u5bf9\u8c61\u4e0a\uff0c\u4f46t\u4ecd\u7136\u662f\u4e00\u4e2a\u57fa\u7c7b\u6307\u9488<\/code><\/pre>\n\n\n\n<p>\u4f46\u5982\u679c\u6211\u4eec\u5df2\u77e5\u8fd9\u4e2a\u8f6c\u6362\u65f6\u5b89\u5168\u7684\uff0c\u90a3\u4e48\u53ef\u4ee5\u7528static_cast\u5f3a\u5236\u8f6c\u6362\uff0c\u8df3\u8fc7\u7f16\u8bd1\u5668\u68c0\u67e5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>FlyTank *pt = static_cast&lt;FlyTank*&gt;(t);<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">override\u548cfinal<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>override<\/strong>\uff1a\u8868\u793a\u8be5\u51fd\u6570\u662f\u8981\u91cd\u5199\u57fa\u7c7b\u76f8\u5e94\u7684\u865a\u51fd\u6570\uff0c\u56e0\u4e3a\u6d3e\u751f\u7c7b\u5982\u679c\u5b9a\u4e49\u4e86\u4e00\u4e2a\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u4e0e\u57fa\u7c7b\u5bf9\u5e94\u7684\u865a\u51fd\u6570\u540d\u5b57\u76f8\u540c\u4f46\u5f62\u53c2\u5217\u8868\u4e0d\u540c\uff0c\u5219\u8be5\u51fd\u6570\u4e0e\u57fa\u7c7b\u865a\u51fd\u6570\u76f8\u4e92\u72ec\u7acb\uff0c\u662f\u5408\u6cd5\u884c\u4e3a\uff0c\u7f16\u8bd1\u5668\u4e0d\u4f1a\u62a5\u9519\uff0c\u800c\u4e14\u56e0\u4e3a\u4e0e\u7f16\u7a0b\u4e60\u60ef\u4e0d\u540c\uff0c\u5bb9\u6613\u51fa\u9519\u5374\u4e0d\u6613\u6392\u67e5\uff0c\u5e94\u8be5\u5f53\u6211\u4eec\u8981\u91cd\u5199\u865a\u51fd\u6570\u7684\u65f6\u5019\uff0c\u52a0\u4e0a<strong>override\u4fee\u9970\uff0c\u7f16\u8bd1\u5668\u5c31\u4f1a\u5e2e\u6211\u68c0\u67e5\u8fd9\u6b21\u91cd\u5199\u884c\u4e3a\u662f\u5426\u6b63\u786e<\/strong>\u3002<\/li><li><strong>final<\/strong>\uff1a\u4f7f\u7528\u8be5\u8bf4\u660e\u7b26\u58f0\u660e\u51fd\u6570\uff0c\u8868\u660e<strong>\u540e\u7eed\u4e0d\u5141\u8bb8\u518d\u8986\u76d6\u8be5\u51fd\u6570<\/strong>\uff08\u4f7f\u7528final\u7684\u65f6\u5019\u4e5f\u50cfoverride\u4e00\u6837\u68c0\u67e5\u5f53\u524d\u662f\u5426\u4e3a\u5408\u6cd5\u7684\u865a\u51fd\u6570\uff09<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>class FlyTank : public BasicTank{\npublic:\n\/* ... *\/\n    void move(int a) override {}\/\/\u975e\u6cd5\uff0c\u53c2\u6570\u5bf9\u4e0d\u4e0a\n    void attack() override {}\/\/\u975e\u6cd5\uff0c\u57fa\u7c7b\u4e2d\u4e0d\u5b58\u5728\u8be5\u51fd\u6570\n    string getPosStr() {}\/\/\u975e\u6cd5\uff0c\u8be5\u51fd\u6570\u4e0d\u662f\u865a\u51fd\u6570\n\n\/* ... *\/\n};\nclass C: public BasicTank{\npublic:\n    \/* ... *\/\n    void move() final {}\/\/final\u80fd\u8d77\u5230override\u7684\u68c0\u67e5\u865a\u51fd\u6570\u5408\u6cd5\u6027\u7684\u4f5c\u7528\uff0c\u540c\u65f6\u5982\u679c\u7ee7\u627fC\u7684\u7c7b\u82e5\u8981\u8986\u76d6move\u5219\u4f1a\u51fa\u9519\n}\nclass D : public C{\npublic:\n    void move() {};\/\/\u975e\u6cd5\uff0cfinal\u540e\u4ecd\u8bd5\u56fe\u91cd\u5199\n    void move() override {};\/\/\u975e\u6cd5\uff0cfinal\u540e\u4ecd\u8bd5\u56fe\u91cd\u5199\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u56de\u907f\u865a\u51fd\u6570\u673a\u5236<\/h3>\n\n\n\n<p>\u5982\u679c\u6211\u60f3\u8981\u5728\u6d3e\u751f\u7c7b\u91cd\u5199\u865a\u51fd\u6570\u65f6\u60f3\u5728\u5df2\u6709\u57fa\u7c7b\u7684\u865a\u51fd\u6570\u4e0a\uff0c\u591a\u589e\u52a0\u4e00\u70b9\u4e1c\u897f\uff0c\u90a3\u4e48\u53ef\u4ee5\u4f7f\u7528<strong>\u4f5c\u7528\u57df\u8fd0\u7b97\u7b26<\/strong>\u5728\u6d3e\u751f\u7c7b\u7684\u91cd\u5199\u51fd\u6570\u7c7b\u8c03\u7528\u57fa\u7c7b\u7684\u3002\uff08\u5728\u4f60\u4e0d\u786e\u5b9a\u57fa\u7c7b\u6307\u9488\u6216\u5f15\u7528\u5b9e\u9645\u6307\u5411\u4ec0\u4e48\u7684\u65f6\u5019\u4e5f\u53ef\u4ee5\u4f7f\u7528\u4f5c\u7528\u57df\u8fd0\u7b97\u7b26\u5f3a\u5236\u8c03\u7528\u5bf9\u5e94\u7684\u865a\u51fd\u6570\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class C: public BasicTank{\npublic:\n    \/* ... *\/\n    void move() override {\n        this-&gt;BasicTank::move();\/\/\u4e0d\u7ba1\u6307\u9488\u6307\u5411\u7684\u5bf9\u8c61\u662f\u54ea\u4e2a\u6d3e\u751f\u7c7b\uff0c\u76f4\u63a5\u8c03\u7528\u57fa\u7c7b\u7684\uff0c\u8fd9\u91cc\u8981\u7701\u53bbBasicTank::\u4f1a\u51fa\u73b0\u65e0\u9650\u9012\u5f52\n        cout &lt;&lt; \"a new version\" &lt;&lt; endl;\n    }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u62bd\u8c61\u57fa\u7c7b<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>\u7eaf\u865a\u51fd\u6570\uff1a\u5f53\u524d\u8fd9\u4e2a\u7c7b\u4e0d\u5b9e\u73b0\u8be5\u865a\u51fd\u6570\uff0c\u4ec5\u58f0\u660e\uff0c\u7531\u7ee7\u627f\u5b83\u7684\u6d3e\u751f\u7c7b\u53bb\u5b9e\u73b0\u3002<\/li><li>\u62bd\u8c61\u57fa\u7c7b\uff1a\u542b\u6709\u6216\u672a\u7ecf\u8986\u76d6\u76f4\u63a5\u7ee7\u627f\u7eaf\u865a\u51fd\u6570\u7684\u7c7b\u662f\u62bd\u8c61\u57fa\u7c7b<\/li><\/ul>\n\n\n\n<p><strong>\u6211\u4eec\u65e0\u6cd5\u521b\u5efa\u62bd\u8c61\u57fa\u7c7b\u7684\u5bf9\u8c61<\/strong>\uff0c\u4f46\u8fd8\u662f\u8981\u6709\u76f8\u5e94\u6784\u9020\u51fd\u6570\uff0c\u56e0\u4e3a\u5c3d\u7ba1\u6211\u4eec\u4e0d\u80fd\u76f4\u63a5\u521b\u5efa\u62bd\u8c61\u57fa\u7c7b\u7684\u5bf9\u8c61\uff0c\u4f46\u62bd\u8c61\u57fa\u7c7b\u7684\u6d3e\u751f\u7c7b\u6784\u9020\u51fd\u6570\u8fd8\u662f\u4f1a\u4f7f\u7528\u62bd\u8c61\u57fa\u7c7b\u7684\u6784\u9020\u51fd\u6570\u6765\u6784\u5efa\u5bf9\u5e94\u7684\u62bd\u8c61\u57fa\u7c7b\u6210\u5458\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8bbf\u95ee\u63a7\u5236\u4e0e\u7ee7\u627f<\/h2>\n\n\n\n<p>\u6d3e\u751f\u7c7b\u53ef\u4ee5\u7ee7\u627f\u5b9a\u4e49\u5728\u57fa\u7c7b\u4e2d\u7684\u6210\u5458\uff0c\u4f46\u662f\u6d3e\u751f\u7c7b\u7684\u6210\u5458\u51fd\u6570\u4e0d\u4e00\u5b9a\u6709\u6743\u8bbf\u95ee\u4ece\u57fa\u7c7b\u7ee7\u627f\u800c\u6765\u7684\u6210\u5458\u3002\u6d3e\u751f\u7c7b\u548c\u53cb\u5143\u80fd\u8bbf\u95ee\u57fa\u7c7b\u7684\u516c\u6709\u6210\u5458\uff08public\uff09\uff0c\u53d7\u4fdd\u62a4\u6210\u5458\uff08protected\uff09\uff0c\u800c\u4e0d\u80fd\u8bbf\u95ee\u57fa\u7c7b\u7684\u79c1\u6709\u6210\u5458\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>\u516c\u6709\u7ee7\u627f\uff1a\u6d3e\u751f\u7c7b\u6210\u5458\u5c06\u9075\u5faa\u5176\u57fa\u7c7b\u539f\u6709\u7684\u8bbf\u95ee\u8bf4\u660e\u7b26<\/strong><\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>class BaseClass{\nprivate:\n    int privateMem;\nprotected:\n    int protectedMem;\npublic:\n    int publicMem;\n};\n\nclass AClass : public BaseClass{\/\/ \u516c\u6709\u7ee7\u627f\n    void usePrivate() { cout &lt;&lt; privateMem &lt;&lt; endl; } \/\/\u975e\u6cd5\uff01privateMem\u662f\u57fa\u7c7b\u79c1\u6709\u6210\u5458\uff0c\u65e0\u6cd5\u8bbf\u95ee\n    void useProtected() { cout &lt;&lt; protectedMem &lt;&lt; endl; }\/\/protectedMem\u516c\u6709\u7ee7\u627f\u540e\u4ecd\u662fprotected\uff0c\u53cb\u5143\u548c\u6210\u5458\u51fd\u6570\u53ef\u4ee5\u8bbf\u95ee\n    void usePublic() { cout &lt;&lt; publicMem &lt;&lt; endl; }\/\/publicMem\u516c\u6709\u7ee7\u627f\u540e\u4ecd\u662fpublic\n};<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>\u53d7\u4fdd\u62a4\u7ee7\u627f\uff1a\u57fa\u7c7b\u4e2d\u7684\u516c\u6709\u6210\u5458\u548c\u53d7\u4fdd\u62a4\u6210\u5458\u5728\u6d3e\u751f\u7c7b\u4e2d<strong>\u90fd\u53d8\u6210\u4e86\u53d7\u4fdd\u62a4\u6210\u5458<\/strong>\uff0c\u539f\u6765\u79c1\u6709\u7684\u73b0\u5728\u8fd8\u662f\u79c1\u6709<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>class DClass : protected BaseClass{\/\/\u53d7\u4fdd\u62a4\u7ee7\u627f\n};\nDClass d;\ncout &lt;&lt; d.publicMem &lt;&lt; endl;\/\/\u975e\u6cd5\uff01\u7ee7\u627f\u8fc7\u6765\u540e\uff0c\u672c\u6765\u5728\u57fa\u7c7b\u4e2d\u7684\u516c\u6709\u6210\u5458\u4e5f\u53d8\u6210\u53d7\u4fdd\u62a4\u4e86\uff0c\u975e\u53cb\u5143\u548c\u6210\u5458\u51fd\u6570\u4e0d\u53ef\u8bbf\u95ee<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>\u79c1\u6709\u7ee7\u627f\uff1a\u4ece\u57fa\u7c7b\u4e2d\u7ee7\u627f\u6765\u7684\u6240\u6709\u6210\u5458\u7686\u79c1\u6709<\/li><\/ul>\n\n\n\n<p>\u5728\u6700\u9876\u4e0a\u7684\u4ee3\u7801\u4e2d\uff0cFlyTank\u662f<strong>\u516c\u6709\u7ee7\u627f<\/strong>\u7684\uff0c\u6240\u4ee5getNextStep\u7684\u53c2\u6570<strong>\u5b58\u5728\u6d3e\u751f\u7c7b\u5230\u57fa\u7c7b\u7684\u8f6c\u6362<\/strong>\uff0c\u4f46\u5982\u679cFlyTank\u662f\u53d7\u4fdd\u62a4\u7ee7\u627f\uff0c\u975e\u6210\u5458\u51fd\u6570\u548c\u53cb\u5143\u5c31\u65e0\u6cd5\u5b9e\u73b0\u8be5\u8f6c\u6362\u3002\u79c1\u6709\u7ee7\u627f\u66f4\u65e0\u6cd5\u4f7f\u7528\u4e86<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class EClass;\nclass BaseClass{\nprivate:\n    int privateMem;\nprotected:\n    int protectedMem;\npublic:\n    int publicMem;\n    friend void func02(EClass &amp;a);\n};\nclass EClass : public BaseClass{\n    int t = 5;\n};\nvoid func02(EClass &amp;a){\n    cout &lt;&lt; a.t &lt;&lt; endl;\/\/\u975e\u6cd5\uff0ct\u662fEClass\u7684\u79c1\u6709\u6210\u5458\uff0c\u800cfunc02\u5e76\u975eECLass\u53cb\u5143\n    cout &lt;&lt; a.publicMem &lt;&lt; endl;\/\/\u6b63\u786e\uff0c\u666e\u901a\u51fd\u6570\u53ef\u4ee5\u8bbf\u95eeECLass\u516c\u6709\u7ee7\u627f\u6765\u7684\u516c\u6709\u53d8\u91cf\n    cout &lt;&lt; a.protectedMem &lt;&lt; endl;\/\/\u6b63\u786e\uff0cfunc02\u662f\u57fa\u7c7b\u7684\u53cb\u5143\uff0cprotectedMem\u5c5e\u4e8e\u57fa\u7c7b\u7684\u53d7\u4fdd\u62a4\u6210\u5458\uff0c\u53ef\u4ee5\u88ab\u57fa\u7c7b\u53cb\u5143\u8bbf\u95ee\n    cout &lt;&lt; a.privateMem &lt;&lt; endl;\u6b63\u786e\uff0cprivateMem \u662f\u57fa\u7c7b\u79c1\u6709\u6210\u5458\uff0c\u540c\u4e0a\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u9ed8\u8ba4\u7684\u7ee7\u627f\u4fdd\u62a4\u7ea7\u522b<\/h3>\n\n\n\n<p>\u5728<strong>\u4e0d\u663e\u793a\u6307\u5b9a\u6d3e\u751f\u7c7b\u7684\u7ee7\u627f\u65b9\u5f0f\u65f6<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>struct\u5173\u952e\u5b57\u5b9a\u4e49\u7684\u6d3e\u751f\u7c7b\u662f<strong>\u516c\u6709\u7ee7\u627f<\/strong><\/li><li>class\u5173\u952e\u5b57\u5b9a\u4e49\u7684\u6d3e\u751f\u7c7b\u662f<strong>\u79c1\u6709\u7ee7\u627f<\/strong><\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>struct FClass : BaseClass{\/\/ \u76f8\u5f53\u4e8estruct FClass : public BaseClass\n};\nclass GClass : BaseClass{\/\/ \u76f8\u5f53\u4e8estruct FClass : private BaseClass\n};<\/code><\/pre>\n\n\n\n<p><strong>class\u548cstruct\u7684\u552f\u4e8c\u5dee\u522b\uff1a\u9ed8\u8ba4\u6210\u5458\u8bbf\u95ee\u8bf4\u660e\u7b26\uff0c\u9ed8\u8ba4\u6d3e\u751f\u8bbf\u95ee\u8bf4\u660e\u7b26<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u865a\u8868\u548c\u865a\u6307\u9488<\/h2>\n\n\n\n<p>C++\u52a8\u6001\u7ed1\u5b9a\u6216\u8005\u8bf4\u591a\u6001\u7684\u5b9e\u73b0\u4f9d\u8d56\u865a\u8868\u3002<br>\u5f53\u4e00\u4e2a<strong>\u7c7b\u5b9a\u4e49\u4e86\u865a\u51fd\u6570\uff0c\u90a3\u4e48\u8be5\u7c7b\u5c31\u4f1a\u6709\u4e00\u4e2a\u865a\u8868<\/strong>\uff0c\u865a\u8868\u8bb0\u5f55\u7684\u662f\u865a\u51fd\u6570\u7684\u5165\u53e3\u5730\u5740<br>\u5f53\u6d3e\u751f\u7c7b\u7ee7\u627f\u4e86\u6709\u865a\u8868\u7684\u57fa\u7c7b\u6216\u8005\u81ea\u8eab\u5b9a\u4e49\u4e86\u865a\u51fd\u6570\u4e5f\u4f1a\u6709\u865a\u8868<strong>\uff0c\u5f53\u91cd\u5199\u4e86\u57fa\u7c7b\u7684\u865a\u51fd\u6570\u540e\uff0c\u865a\u8868\u4e2d\u5bf9\u5e94\u865a\u51fd\u6570\u7684\u5730\u5740\u5c31\u4e0e\u57fa\u7c7b\u4e0d\u540c\u4e86<\/strong>\u3002<\/p>\n\n\n\n<p>\u4e00\u4e2a\u5bf9\u8c61\u6240\u5c5e\u7684\u7c7b\u5b58\u5728\u865a\u8868\uff0c\u90a3\u4e48\u8be5<strong>\u5bf9\u8c61\u4e5f\u5c31\u4f1a\u6709\u4e00\u4e2a\u6307\u5411\u865a\u8868\u7684\u6307\u9488<\/strong>\uff0c\u5f53\u4f7f\u7528\u57fa\u7c7b\u6307\u9488\u6216\u5f15\u7528\u8c03\u7528\u865a\u51fd\u6570\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u5728\u5b9e\u9645\u865a\u8868\u4e2d\u627e\u51fa\u81ea\u5df1\u90a3\u4e2a\u865a\u51fd\u6570\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9762\u5411\u8fc7\u7a0b\uff1a\u4ee3\u7801\u548c\u6570\u636e\u5206\u79bb\u3001\u5206\u6790\u89e3\u51b3\u95ee\u9898\u7684\u6b65\u9aa4\u518d\u4e00\u6b65\u6b65\u5b9e\u73b0 \u4f18\u70b9\uff1a\u6027\u80fd\u9ad8\uff0c\u80fd\u5feb\u901f\u5f00\u53d1 \u7f3a\u70b9\uff1a\u96be\u6269\u5c55\uff0c\u96be\u7ef4\u62a4\uff0c\u8026\u5408&hellip;<a href=\"https:\/\/www.notown.top\/?p=617\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">C++\u7684\u9762\u5411\u5bf9\u8c61\u7a0b\u5e8f\u8bbe\u8ba1<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[11],"tags":[],"class_list":["post-617","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/617","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=617"}],"version-history":[{"count":11,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/617\/revisions"}],"predecessor-version":[{"id":638,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/617\/revisions\/638"}],"wp:attachment":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=617"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=617"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=617"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}