{"id":55641,"date":"2025-08-14T05:54:23","date_gmt":"2025-08-13T21:54:23","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/55641.html"},"modified":"2025-08-14T05:54:23","modified_gmt":"2025-08-13T21:54:23","slug":"c-%e7%a8%8b%e5%ba%8f%e8%ae%be%e8%ae%a1%e5%9f%ba%e7%a1%80-%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e4%b9%8b%e5%a4%9a%e6%80%81","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/55641.html","title":{"rendered":"C# \u7a0b\u5e8f\u8bbe\u8ba1\u57fa\u7840 - \u9762\u5411\u5bf9\u8c61\u4e4b\u201c\u591a\u6001\u201d"},"content":{"rendered":"<h2>1. \u591a\u6001\u6982\u8ff0<\/h2>\n<h3>1.1 \u591a\u6001\u7684\u5b9a\u4e49<\/h3>\n<p>\u591a\u6001\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b&#xff08;OOP&#xff09;\u4e2d\u7684\u4e00\u4e2a\u6838\u5fc3\u6982\u5ff5&#xff0c;\u5b83\u5141\u8bb8\u4f7f\u7528\u4e00\u4e2a\u7edf\u4e00\u7684\u63a5\u53e3\u6765\u64cd\u4f5c\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61&#xff0c;\u4ece\u800c\u5b9e\u73b0\u4ee3\u7801\u7684\u590d\u7528\u6027\u548c\u7075\u6d3b\u6027\u3002\u5177\u4f53\u6765\u8bf4&#xff0c;\u591a\u6001\u662f\u6307\u540c\u4e00\u4e2a\u64cd\u4f5c\u4f5c\u7528\u4e8e\u4e0d\u540c\u7684\u5bf9\u8c61\u65f6&#xff0c;\u53ef\u4ee5\u6709\u4e0d\u540c\u7684\u89e3\u91ca\u548c\u4e0d\u540c\u7684\u6267\u884c\u7ed3\u679c\u3002\u4f8b\u5982&#xff0c;\u4e00\u4e2a\u65b9\u6cd5\u53ef\u4ee5\u88ab\u591a\u4e2a\u5177\u6709\u4e0d\u540c\u5185\u90e8\u5b9e\u73b0\u7684\u5b50\u7c7b\u5bf9\u8c61\u8c03\u7528&#xff0c;\u4f46\u8c03\u7528\u8005\u65e0\u9700\u5173\u5fc3\u5177\u4f53\u662f\u54ea\u4e2a\u5b50\u7c7b\u5bf9\u8c61&#xff0c;\u53ea\u9700\u901a\u8fc7\u7236\u7c7b\u7684\u5f15\u7528\u5373\u53ef\u5b8c\u6210\u64cd\u4f5c\u3002<\/p>\n<h3>1.2 \u591a\u6001\u7684\u5206\u7c7b<\/h3>\n<p>\u591a\u6001\u4e3b\u8981\u5206\u4e3a\u4e24\u79cd\u7c7b\u578b&#xff1a;\u7f16\u8bd1\u65f6\u591a\u6001\u548c\u8fd0\u884c\u65f6\u591a\u6001\u3002<\/p>\n<h4>\u7f16\u8bd1\u65f6\u591a\u6001<\/h4>\n<p>\u7f16\u8bd1\u65f6\u591a\u6001\u4e3b\u8981\u901a\u8fc7\u65b9\u6cd5\u91cd\u8f7d&#xff08;Overloading&#xff09;\u5b9e\u73b0\u3002\u65b9\u6cd5\u91cd\u8f7d\u662f\u6307\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d&#xff0c;\u5141\u8bb8\u5b9a\u4e49\u591a\u4e2a\u540c\u540d\u65b9\u6cd5&#xff0c;\u4f46\u8fd9\u4e9b\u65b9\u6cd5\u7684\u53c2\u6570\u5217\u8868&#xff08;\u53c2\u6570\u7684\u7c7b\u578b\u3001\u4e2a\u6570\u6216\u987a\u5e8f&#xff09;\u5fc5\u987b\u4e0d\u540c\u3002\u7f16\u8bd1\u5668\u5728\u7f16\u8bd1\u9636\u6bb5\u6839\u636e\u65b9\u6cd5\u7684\u53c2\u6570\u5217\u8868\u6765\u786e\u5b9a\u8c03\u7528\u54ea\u4e2a\u5177\u4f53\u7684\u65b9\u6cd5\u3002\u4f8b\u5982&#xff1a;<\/p>\n<p>public class Calculator<br \/>\n{<br \/>\n    public int Add(int a, int b)<br \/>\n    {<br \/>\n        return a &#043; b;<br \/>\n    }<\/p>\n<p>    public double Add(double a, double b)<br \/>\n    {<br \/>\n        return a &#043; b;<br \/>\n    }<br \/>\n}<\/p>\n<p>\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d&#xff0c;Add \u65b9\u6cd5\u88ab\u91cd\u8f7d\u4e86\u4e24\u6b21&#xff0c;\u5206\u522b\u7528\u4e8e\u5904\u7406\u6574\u6570\u548c\u6d6e\u70b9\u6570\u7684\u52a0\u6cd5\u3002\u8c03\u7528\u65f6&#xff0c;\u7f16\u8bd1\u5668\u4f1a\u6839\u636e\u4f20\u5165\u7684\u53c2\u6570\u7c7b\u578b\u6765\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002<\/p>\n<h4>\u8fd0\u884c\u65f6\u591a\u6001<\/h4>\n<p>\u8fd0\u884c\u65f6\u591a\u6001\u4e3b\u8981\u901a\u8fc7\u65b9\u6cd5\u91cd\u5199&#xff08;Overriding&#xff09;\u548c\u865a\u65b9\u6cd5&#xff08;Virtual Methods&#xff09;\u5b9e\u73b0\u3002\u65b9\u6cd5\u91cd\u5199\u662f\u6307\u5b50\u7c7b\u53ef\u4ee5\u91cd\u5199\u7236\u7c7b\u4e2d\u7684\u865a\u65b9\u6cd5&#xff0c;\u4ece\u800c\u63d0\u4f9b\u81ea\u5df1\u7684\u5b9e\u73b0\u3002\u5728\u8fd0\u884c\u65f6&#xff0c;\u8c03\u7528\u8005\u901a\u8fc7\u7236\u7c7b\u7684\u5f15\u7528\u8c03\u7528\u65b9\u6cd5\u65f6&#xff0c;\u5b9e\u9645\u6267\u884c\u7684\u662f\u5b50\u7c7b\u4e2d\u91cd\u5199\u7684\u65b9\u6cd5\u3002\u4f8b\u5982&#xff1a;<\/p>\n<p>public class Animal<br \/>\n{<br \/>\n    public virtual void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Animal makes a sound&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Dog : Animal<br \/>\n{<br \/>\n    public override void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Dog barks&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Cat : Animal<br \/>\n{<br \/>\n    public override void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Cat meows&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d&#xff0c;Animal \u7c7b\u5b9a\u4e49\u4e86\u4e00\u4e2a\u865a\u65b9\u6cd5 MakeSound&#xff0c;\u800c Dog \u548c Cat \u7c7b\u5206\u522b\u91cd\u5199\u4e86\u8be5\u65b9\u6cd5\u3002\u8fd0\u884c\u65f6&#xff0c;\u901a\u8fc7 Animal \u7c7b\u578b\u7684\u5f15\u7528\u8c03\u7528 MakeSound \u65b9\u6cd5\u65f6&#xff0c;\u5b9e\u9645\u6267\u884c\u7684\u662f\u5b50\u7c7b\u4e2d\u91cd\u5199\u7684\u65b9\u6cd5&#xff1a;<\/p>\n<p>Animal myDog &#061; new Dog();<br \/>\nAnimal myCat &#061; new Cat();<\/p>\n<p>myDog.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Dog barks<br \/>\nmyCat.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Cat meows<\/p>\n<p>\u8fd0\u884c\u65f6\u591a\u6001\u7684\u5173\u952e\u5728\u4e8e\u865a\u65b9\u6cd5\u7684\u4f7f\u7528&#xff0c;\u5b83\u5141\u8bb8\u5b50\u7c7b\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u5730\u66ff\u6362\u7236\u7c7b\u7684\u65b9\u6cd5\u5b9e\u73b0&#xff0c;\u4ece\u800c\u5b9e\u73b0\u4ee3\u7801\u7684\u7075\u6d3b\u6027\u548c\u6269\u5c55\u6027\u3002<\/p>\n<h2>2. \u7f16\u8bd1\u65f6\u591a\u6001<\/h2>\n<h3>2.1 \u65b9\u6cd5\u91cd\u8f7d<\/h3>\n<p>\u65b9\u6cd5\u91cd\u8f7d\u662f\u7f16\u8bd1\u65f6\u591a\u6001\u7684\u4e00\u79cd\u91cd\u8981\u5b9e\u73b0\u65b9\u5f0f&#xff0c;\u5b83\u5141\u8bb8\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d\u5b9a\u4e49\u591a\u4e2a\u540c\u540d\u65b9\u6cd5&#xff0c;\u4f46\u8fd9\u4e9b\u65b9\u6cd5\u7684\u53c2\u6570\u5217\u8868\u5fc5\u987b\u4e0d\u540c\u3002\u53c2\u6570\u5217\u8868\u7684\u4e0d\u540c\u53ef\u4ee5\u4f53\u73b0\u5728\u53c2\u6570\u7684\u7c7b\u578b\u3001\u4e2a\u6570\u6216\u987a\u5e8f\u4e0a\u3002\u7f16\u8bd1\u5668\u5728\u7f16\u8bd1\u9636\u6bb5\u4f1a\u6839\u636e\u65b9\u6cd5\u7684\u53c2\u6570\u5217\u8868\u6765\u786e\u5b9a\u8c03\u7528\u54ea\u4e2a\u5177\u4f53\u7684\u65b9\u6cd5\u3002<\/p>\n<h4>\u65b9\u6cd5\u91cd\u8f7d\u7684\u4f18\u52bf<\/h4>\n<ul>\n<li>\n<p>\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027&#xff1a;\u901a\u8fc7\u4f7f\u7528\u76f8\u540c\u7684\u65b9\u6cd5\u540d&#xff0c;\u53ef\u4ee5\u66f4\u76f4\u89c2\u5730\u8868\u8fbe\u65b9\u6cd5\u7684\u529f\u80fd&#xff0c;\u51cf\u5c11\u8bb0\u5fc6\u8d1f\u62c5\u3002<\/p>\n<\/li>\n<li>\n<p>\u589e\u5f3a\u4ee3\u7801\u7684\u7075\u6d3b\u6027&#xff1a;\u5141\u8bb8\u5f00\u53d1\u8005\u6839\u636e\u4e0d\u540c\u7684\u8f93\u5165\u53c2\u6570\u63d0\u4f9b\u4e0d\u540c\u7684\u5b9e\u73b0&#xff0c;\u4ece\u800c\u6ee1\u8db3\u4e0d\u540c\u7684\u9700\u6c42\u3002<\/p>\n<\/li>\n<li>\n<p>\u907f\u514d\u65b9\u6cd5\u547d\u540d\u51b2\u7a81&#xff1a;\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d&#xff0c;\u53ef\u4ee5\u5b9a\u4e49\u591a\u4e2a\u529f\u80fd\u76f8\u4f3c\u4f46\u53c2\u6570\u4e0d\u540c\u7684\u65b9\u6cd5&#xff0c;\u800c\u65e0\u9700\u4e3a\u6bcf\u4e2a\u65b9\u6cd5\u4f7f\u7528\u4e0d\u540c\u7684\u540d\u79f0\u3002<\/p>\n<\/li>\n<\/ul>\n<h5>\u793a\u4f8b\u4ee3\u7801<\/h5>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u65b9\u6cd5\u91cd\u8f7d\u7684\u793a\u4f8b&#xff0c;\u5c55\u793a\u4e86\u5982\u4f55\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d\u5b9a\u4e49\u591a\u4e2a\u540c\u540d\u65b9\u6cd5&#xff0c;\u4f46\u53c2\u6570\u5217\u8868\u4e0d\u540c&#xff1a;<\/p>\n<p>public class Calculator<br \/>\n{<br \/>\n    \/\/ \u65b9\u6cd5\u91cd\u8f7d&#xff1a;\u5904\u7406\u4e24\u4e2a\u6574\u6570\u7684\u52a0\u6cd5<br \/>\n    public int Add(int a, int b)<br \/>\n    {<br \/>\n        return a &#043; b;<br \/>\n    }<\/p>\n<p>    \/\/ \u65b9\u6cd5\u91cd\u8f7d&#xff1a;\u5904\u7406\u4e09\u4e2a\u6574\u6570\u7684\u52a0\u6cd5<br \/>\n    public int Add(int a, int b, int c)<br \/>\n    {<br \/>\n        return a &#043; b &#043; c;<br \/>\n    }<\/p>\n<p>    \/\/ \u65b9\u6cd5\u91cd\u8f7d&#xff1a;\u5904\u7406\u4e24\u4e2a\u6d6e\u70b9\u6570\u7684\u52a0\u6cd5<br \/>\n    public double Add(double a, double b)<br \/>\n    {<br \/>\n        return a &#043; b;<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Program<br \/>\n{<br \/>\n    public static void Main()<br \/>\n    {<br \/>\n        Calculator calc &#061; new Calculator();<\/p>\n<p>        \/\/ \u8c03\u7528\u7b2c\u4e00\u4e2a\u91cd\u8f7d\u65b9\u6cd5<br \/>\n        int result1 &#061; calc.Add(5, 3);<br \/>\n        Console.WriteLine(&#034;5 &#043; 3 &#061; &#034; &#043; result1); \/\/ \u8f93\u51fa&#xff1a;5 &#043; 3 &#061; 8<\/p>\n<p>        \/\/ \u8c03\u7528\u7b2c\u4e8c\u4e2a\u91cd\u8f7d\u65b9\u6cd5<br \/>\n        int result2 &#061; calc.Add(5, 3, 2);<br \/>\n        Console.WriteLine(&#034;5 &#043; 3 &#043; 2 &#061; &#034; &#043; result2); \/\/ \u8f93\u51fa&#xff1a;5 &#043; 3 &#043; 2 &#061; 10<\/p>\n<p>        \/\/ \u8c03\u7528\u7b2c\u4e09\u4e2a\u91cd\u8f7d\u65b9\u6cd5<br \/>\n        double result3 &#061; calc.Add(5.5, 3.3);<br \/>\n        Console.WriteLine(&#034;5.5 &#043; 3.3 &#061; &#034; &#043; result3); \/\/ \u8f93\u51fa&#xff1a;5.5 &#043; 3.3 &#061; 8.8<br \/>\n    }<br \/>\n}<\/p>\n<h4>\u65b9\u6cd5\u91cd\u8f7d\u7684\u89c4\u5219<\/h4>\n<ul>\n<li>\n<p>\u65b9\u6cd5\u540d\u76f8\u540c&#xff1a;\u91cd\u8f7d\u7684\u65b9\u6cd5\u5fc5\u987b\u5177\u6709\u76f8\u540c\u7684\u540d\u79f0\u3002<\/p>\n<\/li>\n<li>\n<p>\u53c2\u6570\u5217\u8868\u4e0d\u540c&#xff1a;\u91cd\u8f7d\u7684\u65b9\u6cd5\u5fc5\u987b\u5728\u53c2\u6570\u7684\u7c7b\u578b\u3001\u4e2a\u6570\u6216\u987a\u5e8f\u4e0a\u6709\u6240\u4e0d\u540c\u3002<\/p>\n<\/li>\n<li>\n<p>\u8fd4\u56de\u7c7b\u578b\u65e0\u5173&#xff1a;\u65b9\u6cd5\u7684\u8fd4\u56de\u7c7b\u578b\u4e0d\u5f71\u54cd\u65b9\u6cd5\u7684\u91cd\u8f7d&#xff0c;\u5373\u4f7f\u4e24\u4e2a\u65b9\u6cd5\u7684\u8fd4\u56de\u7c7b\u578b\u4e0d\u540c&#xff0c;\u4f46\u53ea\u8981\u53c2\u6570\u5217\u8868\u76f8\u540c&#xff0c;\u5b83\u4eec\u5c31\u4e0d\u662f\u91cd\u8f7d\u65b9\u6cd5\u3002<\/p>\n<\/li>\n<\/ul>\n<h4>\u6ce8\u610f\u4e8b\u9879<\/h4>\n<ul>\n<li>\n<p>\u907f\u514d\u6b67\u4e49&#xff1a;\u5982\u679c\u65b9\u6cd5\u91cd\u8f7d\u7684\u53c2\u6570\u5217\u8868\u8fc7\u4e8e\u76f8\u4f3c&#xff0c;\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8c03\u7528\u65f6\u51fa\u73b0\u6b67\u4e49\u3002\u4f8b\u5982&#xff0c;\u5f53\u5b58\u5728\u4e24\u4e2a\u91cd\u8f7d\u65b9\u6cd5&#xff0c;\u4e00\u4e2a\u63a5\u53d7\u4e00\u4e2a\u6574\u6570\u53c2\u6570&#xff0c;\u53e6\u4e00\u4e2a\u63a5\u53d7\u4e00\u4e2a\u6d6e\u70b9\u6570\u53c2\u6570\u65f6&#xff0c;\u8c03\u7528\u65f6\u4f20\u5165\u4e00\u4e2a\u6574\u6570\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u5668\u65e0\u6cd5\u786e\u5b9a\u8c03\u7528\u54ea\u4e2a\u65b9\u6cd5\u3002<\/p>\n<\/li>\n<li>\n<p>\u53c2\u6570\u7c7b\u578b\u7684\u63d0\u5347&#xff1a;\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b&#xff0c;\u7f16\u8bd1\u5668\u4f1a\u81ea\u52a8\u8fdb\u884c\u53c2\u6570\u7c7b\u578b\u7684\u63d0\u5347\u3002\u4f8b\u5982&#xff0c;\u5f53\u8c03\u7528\u4e00\u4e2a\u63a5\u53d7\u6d6e\u70b9\u6570\u53c2\u6570\u7684\u65b9\u6cd5\u65f6&#xff0c;\u4f20\u5165\u4e00\u4e2a\u6574\u6570&#xff0c;\u7f16\u8bd1\u5668\u4f1a\u81ea\u52a8\u5c06\u6574\u6570\u63d0\u5347\u4e3a\u6d6e\u70b9\u6570\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b&#xff0c;\u9700\u8981\u7279\u522b\u6ce8\u610f\u65b9\u6cd5\u91cd\u8f7d\u7684\u5b9a\u4e49&#xff0c;\u4ee5\u907f\u514d\u6f5c\u5728\u7684\u6b67\u4e49\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>2.2 \u8fd0\u7b97\u7b26\u91cd\u8f7d<\/h3>\n<p>\u8fd0\u7b97\u7b26\u91cd\u8f7d\u662f\u7f16\u8bd1\u65f6\u591a\u6001\u7684\u53e6\u4e00\u79cd\u5b9e\u73b0\u65b9\u5f0f&#xff0c;\u5b83\u5141\u8bb8\u5f00\u53d1\u8005\u4e3a\u81ea\u5b9a\u4e49\u7c7b\u578b\u91cd\u5b9a\u4e49\u8fd0\u7b97\u7b26\u7684\u884c\u4e3a\u3002\u901a\u8fc7\u8fd0\u7b97\u7b26\u91cd\u8f7d&#xff0c;\u53ef\u4ee5\u4e3a\u7c7b\u6216\u7ed3\u6784\u4f53\u5b9a\u4e49\u7279\u5b9a\u7684\u8fd0\u7b97\u7b26\u884c\u4e3a&#xff0c;\u4ece\u800c\u4f7f\u8fd9\u4e9b\u7c7b\u578b\u80fd\u591f\u50cf\u5185\u7f6e\u7c7b\u578b\u4e00\u6837\u4f7f\u7528\u8fd0\u7b97\u7b26\u3002<\/p>\n<h4>\u8fd0\u7b97\u7b26\u91cd\u8f7d\u7684\u4f18\u52bf<\/h4>\n<ul>\n<li>\n<p>\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027&#xff1a;\u901a\u8fc7\u4e3a\u81ea\u5b9a\u4e49\u7c7b\u578b\u5b9a\u4e49\u8fd0\u7b97\u7b26\u884c\u4e3a&#xff0c;\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u52a0\u76f4\u89c2\u548c\u81ea\u7136\u3002<\/p>\n<\/li>\n<li>\n<p>\u589e\u5f3a\u4ee3\u7801\u7684\u8868\u8fbe\u80fd\u529b&#xff1a;\u5141\u8bb8\u5f00\u53d1\u8005\u4e3a\u81ea\u5b9a\u4e49\u7c7b\u578b\u63d0\u4f9b\u7c7b\u4f3c\u4e8e\u5185\u7f6e\u7c7b\u578b\u7684\u8fd0\u7b97\u7b26\u652f\u6301&#xff0c;\u4ece\u800c\u63d0\u9ad8\u4ee3\u7801\u7684\u8868\u8fbe\u80fd\u529b\u548c\u7075\u6d3b\u6027\u3002<\/p>\n<\/li>\n<li>\n<p>\u907f\u514d\u7c7b\u578b\u8f6c\u6362&#xff1a;\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b&#xff0c;\u8fd0\u7b97\u7b26\u91cd\u8f7d\u53ef\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u7c7b\u578b\u8f6c\u6362&#xff0c;\u63d0\u9ad8\u4ee3\u7801\u7684\u6548\u7387\u3002<\/p>\n<\/li>\n<\/ul>\n<h5>\u793a\u4f8b\u4ee3\u7801<\/h5>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8fd0\u7b97\u7b26\u91cd\u8f7d\u7684\u793a\u4f8b&#xff0c;\u5c55\u793a\u4e86\u5982\u4f55\u4e3a\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7c7b\u91cd\u5b9a\u4e49\u52a0\u6cd5\u8fd0\u7b97\u7b26\u7684\u884c\u4e3a&#xff1a;<\/p>\n<p>public class Point<br \/>\n{<br \/>\n    public int X { get; set; }<br \/>\n    public int Y { get; set; }<\/p>\n<p>    public Point(int x, int y)<br \/>\n    {<br \/>\n        X &#061; x;<br \/>\n        Y &#061; y;<br \/>\n    }<\/p>\n<p>    \/\/ \u91cd\u8f7d\u52a0\u6cd5\u8fd0\u7b97\u7b26<br \/>\n    public static Point operator &#043;(Point a, Point b)<br \/>\n    {<br \/>\n        return new Point(a.X &#043; b.X, a.Y &#043; b.Y);<br \/>\n    }<\/p>\n<p>    public override string ToString()<br \/>\n    {<br \/>\n        return $&#034;({X}, {Y})&#034;;<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Program<br \/>\n{<br \/>\n    public static void Main()<br \/>\n    {<br \/>\n        Point p1 &#061; new Point(1, 2);<br \/>\n        Point p2 &#061; new Point(3, 4);<\/p>\n<p>        \/\/ \u4f7f\u7528\u91cd\u8f7d\u7684\u52a0\u6cd5\u8fd0\u7b97\u7b26<br \/>\n        Point p3 &#061; p1 &#043; p2;<br \/>\n        Console.WriteLine($&#034;p1 &#043; p2 &#061; {p3}&#034;); \/\/ \u8f93\u51fa&#xff1a;p1 &#043; p2 &#061; (4, 6)<br \/>\n    }<br \/>\n}<\/p>\n<h4>\u8fd0\u7b97\u7b26\u91cd\u8f7d\u7684\u89c4\u5219<\/h4>\n<ul>\n<li>\n<p>\u53ea\u80fd\u91cd\u8f7d\u5df2\u6709\u7684\u8fd0\u7b97\u7b26&#xff1a;\u4e0d\u80fd\u5b9a\u4e49\u65b0\u7684\u8fd0\u7b97\u7b26\u3002<\/p>\n<\/li>\n<li>\n<p>\u53ea\u80fd\u91cd\u8f7d\u7c7b\u6216\u7ed3\u6784\u4f53\u7684\u8fd0\u7b97\u7b26&#xff1a;\u8fd0\u7b97\u7b26\u91cd\u8f7d\u5fc5\u987b\u5728\u7c7b\u6216\u7ed3\u6784\u4f53\u5185\u90e8\u5b9a\u4e49\u3002<\/p>\n<\/li>\n<li>\n<p>\u4e0d\u80fd\u91cd\u8f7d\u5355\u76ee\u8fd0\u7b97\u7b26\u7684\u8fd4\u56de\u7c7b\u578b&#xff1a;\u5355\u76ee\u8fd0\u7b97\u7b26\u7684\u8fd4\u56de\u7c7b\u578b\u5fc5\u987b\u4e0e\u91cd\u8f7d\u7684\u7c7b\u6216\u7ed3\u6784\u4f53\u76f8\u540c\u3002<\/p>\n<\/li>\n<li>\n<p>\u4e0d\u80fd\u91cd\u8f7d\u8d4b\u503c\u8fd0\u7b97\u7b26&#xff1a;\u8d4b\u503c\u8fd0\u7b97\u7b26\u4e0d\u80fd\u88ab\u91cd\u8f7d\u3002<\/p>\n<\/li>\n<\/ul>\n<h4>\u6ce8\u610f\u4e8b\u9879<\/h4>\n<ul>\n<li>\n<p>\u907f\u514d\u6ee5\u7528&#xff1a;\u8fd0\u7b97\u7b26\u91cd\u8f7d\u53ef\u80fd\u4f1a\u4f7f\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u964d\u4f4e&#xff0c;\u7279\u522b\u662f\u5f53\u91cd\u8f7d\u7684\u8fd0\u7b97\u7b26\u884c\u4e3a\u4e0e\u5e38\u89c4\u7406\u89e3\u4e0d\u4e00\u81f4\u65f6\u3002\u56e0\u6b64&#xff0c;\u5e94\u8c28\u614e\u4f7f\u7528\u8fd0\u7b97\u7b26\u91cd\u8f7d&#xff0c;\u786e\u4fdd\u5176\u884c\u4e3a\u7b26\u5408\u7528\u6237\u7684\u9884\u671f\u3002<\/p>\n<\/li>\n<li>\n<p>\u4e00\u81f4\u6027&#xff1a;\u91cd\u8f7d\u7684\u8fd0\u7b97\u7b26\u884c\u4e3a\u5e94\u4e0e\u5185\u7f6e\u7c7b\u578b\u7684\u8fd0\u7b97\u7b26\u884c\u4e3a\u4fdd\u6301\u4e00\u81f4&#xff0c;\u4ee5\u907f\u514d\u6df7\u6dc6\u3002<\/p>\n<\/li>\n<li>\n<p>\u6027\u80fd\u5f71\u54cd&#xff1a;\u8fd0\u7b97\u7b26\u91cd\u8f7d\u53ef\u80fd\u4f1a\u5bf9\u6027\u80fd\u4ea7\u751f\u5f71\u54cd&#xff0c;\u7279\u522b\u662f\u5728\u6d89\u53ca\u590d\u6742\u8ba1\u7b97\u6216\u5927\u91cf\u6570\u636e\u65f6\u3002\u56e0\u6b64&#xff0c;\u9700\u8981\u5728\u6027\u80fd\u548c\u53ef\u8bfb\u6027\u4e4b\u95f4\u8fdb\u884c\u6743\u8861\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>3. \u8fd0\u884c\u65f6\u591a\u6001<\/h2>\n<h3>3.1 \u65b9\u6cd5\u8986\u76d6<\/h3>\n<p>\u65b9\u6cd5\u8986\u76d6&#xff08;Override&#xff09;\u662f\u8fd0\u884c\u65f6\u591a\u6001\u7684\u6838\u5fc3\u673a\u5236\u4e4b\u4e00&#xff0c;\u5b83\u5141\u8bb8\u5b50\u7c7b\u91cd\u5199\u7236\u7c7b\u4e2d\u7684\u865a\u65b9\u6cd5&#xff0c;\u4ece\u800c\u63d0\u4f9b\u81ea\u5df1\u7684\u5b9e\u73b0\u3002\u5f53\u901a\u8fc7\u7236\u7c7b\u7684\u5f15\u7528\u8c03\u7528\u8be5\u65b9\u6cd5\u65f6&#xff0c;\u5b9e\u9645\u6267\u884c\u7684\u662f\u5b50\u7c7b\u4e2d\u91cd\u5199\u7684\u65b9\u6cd5\u3002\u8fd9\u79cd\u673a\u5236\u4f7f\u5f97\u7a0b\u5e8f\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u5730\u9009\u62e9\u65b9\u6cd5\u7684\u5b9e\u73b0&#xff0c;\u4ece\u800c\u5b9e\u73b0\u4ee3\u7801\u7684\u7075\u6d3b\u6027\u548c\u6269\u5c55\u6027\u3002<\/p>\n<h4>\u65b9\u6cd5\u8986\u76d6\u7684\u4f18\u52bf<\/h4>\n<ul>\n<li>\n<p>\u589e\u5f3a\u4ee3\u7801\u7684\u7075\u6d3b\u6027&#xff1a;\u5b50\u7c7b\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u9700\u6c42\u91cd\u5199\u7236\u7c7b\u7684\u65b9\u6cd5&#xff0c;\u4ece\u800c\u63d0\u4f9b\u66f4\u7b26\u5408\u81ea\u8eab\u7279\u6027\u7684\u5b9e\u73b0\u3002<\/p>\n<\/li>\n<li>\n<p>\u5b9e\u73b0\u4ee3\u7801\u7684\u6269\u5c55\u6027&#xff1a;\u901a\u8fc7\u65b9\u6cd5\u8986\u76d6&#xff0c;\u53ef\u4ee5\u5728\u4e0d\u4fee\u6539\u7236\u7c7b\u4ee3\u7801\u7684\u60c5\u51b5\u4e0b&#xff0c;\u4e3a\u5b50\u7c7b\u6dfb\u52a0\u65b0\u7684\u884c\u4e3a&#xff0c;\u4ece\u800c\u5b9e\u73b0\u4ee3\u7801\u7684\u6269\u5c55\u6027\u3002<\/p>\n<\/li>\n<li>\n<p>\u63d0\u9ad8\u4ee3\u7801\u7684\u590d\u7528\u6027&#xff1a;\u7236\u7c7b\u4e2d\u7684\u65b9\u6cd5\u53ef\u4ee5\u88ab\u591a\u4e2a\u5b50\u7c7b\u7ee7\u627f\u548c\u91cd\u5199&#xff0c;\u4ece\u800c\u5b9e\u73b0\u4ee3\u7801\u7684\u590d\u7528\u6027\u3002<\/p>\n<\/li>\n<\/ul>\n<h5>\u793a\u4f8b\u4ee3\u7801<\/h5>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u65b9\u6cd5\u8986\u76d6\u7684\u793a\u4f8b&#xff0c;\u5c55\u793a\u4e86\u5982\u4f55\u5728\u5b50\u7c7b\u4e2d\u91cd\u5199\u7236\u7c7b\u7684\u865a\u65b9\u6cd5&#xff1a;<\/p>\n<p>public class Animal<br \/>\n{<br \/>\n    public virtual void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Animal makes a sound&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Dog : Animal<br \/>\n{<br \/>\n    public override void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Dog barks&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Cat : Animal<br \/>\n{<br \/>\n    public override void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Cat meows&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Program<br \/>\n{<br \/>\n    public static void Main()<br \/>\n    {<br \/>\n        Animal myDog &#061; new Dog();<br \/>\n        Animal myCat &#061; new Cat();<\/p>\n<p>        myDog.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Dog barks<br \/>\n        myCat.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Cat meows<br \/>\n    }<br \/>\n}<\/p>\n<h4>\u65b9\u6cd5\u8986\u76d6\u7684\u89c4\u5219<\/h4>\n<ul>\n<li>\n<p>\u65b9\u6cd5\u540d\u76f8\u540c&#xff1a;\u5b50\u7c7b\u91cd\u5199\u7684\u65b9\u6cd5\u5fc5\u987b\u4e0e\u7236\u7c7b\u4e2d\u7684\u865a\u65b9\u6cd5\u5177\u6709\u76f8\u540c\u7684\u65b9\u6cd5\u540d\u3001\u53c2\u6570\u5217\u8868\u548c\u8fd4\u56de\u7c7b\u578b\u3002<\/p>\n<\/li>\n<li>\n<p>\u8bbf\u95ee\u4fee\u9970\u7b26&#xff1a;\u5b50\u7c7b\u91cd\u5199\u7684\u65b9\u6cd5\u4e0d\u80fd\u4f7f\u7528\u6bd4\u7236\u7c7b\u65b9\u6cd5\u66f4\u4e25\u683c\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u3002<\/p>\n<\/li>\n<li>\n<p>\u865a\u65b9\u6cd5\u4fee\u9970\u7b26&#xff1a;\u7236\u7c7b\u4e2d\u7684\u65b9\u6cd5\u5fc5\u987b\u4f7f\u7528 virtual \u4fee\u9970\u7b26&#xff0c;\u5b50\u7c7b\u4e2d\u7684\u65b9\u6cd5\u5fc5\u987b\u4f7f\u7528 override \u4fee\u9970\u7b26\u3002<\/p>\n<\/li>\n<li>\n<p>\u4e0d\u80fd\u8986\u76d6\u975e\u865a\u65b9\u6cd5&#xff1a;\u5b50\u7c7b\u4e0d\u80fd\u8986\u76d6\u7236\u7c7b\u4e2d\u7684\u975e\u865a\u65b9\u6cd5\u3002<\/p>\n<\/li>\n<\/ul>\n<h4>\u6ce8\u610f\u4e8b\u9879<\/h4>\n<ul>\n<li>\n<p>\u8c03\u7528\u7236\u7c7b\u65b9\u6cd5&#xff1a;\u5728\u5b50\u7c7b\u4e2d\u91cd\u5199\u7236\u7c7b\u7684\u65b9\u6cd5\u65f6&#xff0c;\u53ef\u4ee5\u901a\u8fc7 base \u5173\u952e\u5b57\u8c03\u7528\u7236\u7c7b\u4e2d\u7684\u65b9\u6cd5&#xff0c;\u4ee5\u4fbf\u5728\u5b50\u7c7b\u7684\u5b9e\u73b0\u4e2d\u4fdd\u7559\u7236\u7c7b\u7684\u884c\u4e3a\u3002<\/p>\n<\/li>\n<li>\n<p>\u907f\u514d\u8986\u76d6\u975e\u865a\u65b9\u6cd5&#xff1a;\u5982\u679c\u7236\u7c7b\u4e2d\u7684\u65b9\u6cd5\u6ca1\u6709\u4f7f\u7528 virtual \u4fee\u9970\u7b26&#xff0c;\u5219\u5b50\u7c7b\u65e0\u6cd5\u8986\u76d6\u8be5\u65b9\u6cd5\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b&#xff0c;\u5b50\u7c7b\u53ef\u4ee5\u9690\u85cf\u7236\u7c7b\u7684\u65b9\u6cd5&#xff0c;\u4f46\u9690\u85cf\u65b9\u6cd5\u7684\u884c\u4e3a\u4e0e\u8986\u76d6\u65b9\u6cd5\u7684\u884c\u4e3a\u4e0d\u540c\u3002<\/p>\n<\/li>\n<li>\n<p>\u6027\u80fd\u5f71\u54cd&#xff1a;\u65b9\u6cd5\u8986\u76d6\u53ef\u80fd\u4f1a\u5bf9\u6027\u80fd\u4ea7\u751f\u4e00\u5b9a\u5f71\u54cd&#xff0c;\u7279\u522b\u662f\u5728\u6d89\u53ca\u591a\u5c42\u7ee7\u627f\u548c\u9891\u7e41\u8c03\u7528\u865a\u65b9\u6cd5\u65f6\u3002\u56e0\u6b64&#xff0c;\u9700\u8981\u5728\u6027\u80fd\u548c\u7075\u6d3b\u6027\u4e4b\u95f4\u8fdb\u884c\u6743\u8861\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>3.2 \u865a\u65b9\u6cd5\u4e0e\u62bd\u8c61\u65b9\u6cd5<\/h3>\n<p>\u865a\u65b9\u6cd5&#xff08;Virtual Methods&#xff09;\u548c\u62bd\u8c61\u65b9\u6cd5&#xff08;Abstract Methods&#xff09;\u662f\u5b9e\u73b0\u8fd0\u884c\u65f6\u591a\u6001\u7684\u4e24\u79cd\u91cd\u8981\u65b9\u5f0f\u3002\u5b83\u4eec\u90fd\u5141\u8bb8\u5b50\u7c7b\u91cd\u5199\u7236\u7c7b\u4e2d\u7684\u65b9\u6cd5&#xff0c;\u4f46\u5b83\u4eec\u7684\u4f7f\u7528\u573a\u666f\u548c\u8bed\u4e49\u6709\u6240\u4e0d\u540c\u3002<\/p>\n<h4>\u865a\u65b9\u6cd5<\/h4>\n<p>\u865a\u65b9\u6cd5\u662f\u6307\u5728\u7236\u7c7b\u4e2d\u4f7f\u7528 virtual \u4fee\u9970\u7b26\u5b9a\u4e49\u7684\u65b9\u6cd5&#xff0c;\u5b50\u7c7b\u53ef\u4ee5\u4f7f\u7528 override \u4fee\u9970\u7b26\u91cd\u5199\u8be5\u65b9\u6cd5\u3002\u865a\u65b9\u6cd5\u63d0\u4f9b\u4e86\u4e00\u4e2a\u9ed8\u8ba4\u7684\u5b9e\u73b0&#xff0c;\u5b50\u7c7b\u53ef\u4ee5\u9009\u62e9\u6027\u5730\u91cd\u5199\u8be5\u65b9\u6cd5\u3002\u5982\u679c\u5b50\u7c7b\u6ca1\u6709\u91cd\u5199\u865a\u65b9\u6cd5&#xff0c;\u5219\u4f1a\u7ee7\u627f\u7236\u7c7b\u4e2d\u7684\u9ed8\u8ba4\u5b9e\u73b0\u3002<\/p>\n<h5>\u793a\u4f8b\u4ee3\u7801<\/h5>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u865a\u65b9\u6cd5\u7684\u793a\u4f8b&#xff0c;\u5c55\u793a\u4e86\u5982\u4f55\u5728\u7236\u7c7b\u4e2d\u5b9a\u4e49\u865a\u65b9\u6cd5&#xff0c;\u5e76\u5728\u5b50\u7c7b\u4e2d\u91cd\u5199\u8be5\u65b9\u6cd5&#xff1a;<\/p>\n<p>public class Animal<br \/>\n{<br \/>\n    public virtual void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Animal makes a sound&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Dog : Animal<br \/>\n{<br \/>\n    public override void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Dog barks&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Cat : Animal<br \/>\n{<br \/>\n    public override void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Cat meows&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Program<br \/>\n{<br \/>\n    public static void Main()<br \/>\n    {<br \/>\n        Animal myDog &#061; new Dog();<br \/>\n        Animal myCat &#061; new Cat();<\/p>\n<p>        myDog.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Dog barks<br \/>\n        myCat.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Cat meows<br \/>\n    }<br \/>\n}<\/p>\n<h4>\u62bd\u8c61\u65b9\u6cd5<\/h4>\n<p>\u62bd\u8c61\u65b9\u6cd5\u662f\u6307\u5728\u7236\u7c7b\u4e2d\u4f7f\u7528 abstract \u4fee\u9970\u7b26\u5b9a\u4e49\u7684\u65b9\u6cd5&#xff0c;\u5b50\u7c7b\u5fc5\u987b\u91cd\u5199\u8be5\u65b9\u6cd5\u3002\u62bd\u8c61\u65b9\u6cd5\u6ca1\u6709\u5177\u4f53\u7684\u5b9e\u73b0&#xff0c;\u5b83\u5b9a\u4e49\u4e86\u4e00\u4e2a\u63a5\u53e3&#xff0c;\u5b50\u7c7b\u5fc5\u987b\u63d0\u4f9b\u5177\u4f53\u7684\u5b9e\u73b0\u3002\u62bd\u8c61\u65b9\u6cd5\u901a\u5e38\u7528\u4e8e\u5b9a\u4e49\u5b50\u7c7b\u5fc5\u987b\u5b9e\u73b0\u7684\u884c\u4e3a&#xff0c;\u4ece\u800c\u786e\u4fdd\u5b50\u7c7b\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h5>\u793a\u4f8b\u4ee3\u7801<\/h5>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u793a\u4f8b&#xff0c;\u5c55\u793a\u4e86\u5982\u4f55\u5728\u62bd\u8c61\u7c7b\u4e2d\u5b9a\u4e49\u62bd\u8c61\u65b9\u6cd5&#xff0c;\u5e76\u5728\u5b50\u7c7b\u4e2d\u5b9e\u73b0\u8be5\u65b9\u6cd5&#xff1a;<\/p>\n<p>public abstract class Animal<br \/>\n{<br \/>\n    public abstract void MakeSound();<br \/>\n}<\/p>\n<p>public class Dog : Animal<br \/>\n{<br \/>\n    public override void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Dog barks&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Cat : Animal<br \/>\n{<br \/>\n    public override void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Cat meows&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Program<br \/>\n{<br \/>\n    public static void Main()<br \/>\n    {<br \/>\n        Animal myDog &#061; new Dog();<br \/>\n        Animal myCat &#061; new Cat();<\/p>\n<p>        myDog.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Dog barks<br \/>\n        myCat.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Cat meows<br \/>\n    }<br \/>\n}<\/p>\n<h4>\u865a\u65b9\u6cd5\u4e0e\u62bd\u8c61\u65b9\u6cd5\u7684\u6bd4\u8f83<\/h4>\n<ul>\n<li>\n<p>\u865a\u65b9\u6cd5&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u9ed8\u8ba4\u5b9e\u73b0&#xff1a;\u865a\u65b9\u6cd5\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u9ed8\u8ba4\u7684\u5b9e\u73b0&#xff0c;\u5b50\u7c7b\u53ef\u4ee5\u9009\u62e9\u6027\u5730\u91cd\u5199\u8be5\u65b9\u6cd5\u3002<\/p>\n<\/li>\n<li>\n<p>\u53ef\u9009\u91cd\u5199&#xff1a;\u5b50\u7c7b\u53ef\u4ee5\u9009\u62e9\u4e0d\u91cd\u5199\u865a\u65b9\u6cd5&#xff0c;\u4ece\u800c\u7ee7\u627f\u7236\u7c7b\u4e2d\u7684\u9ed8\u8ba4\u5b9e\u73b0\u3002<\/p>\n<\/li>\n<li>\n<p>\u9002\u7528\u573a\u666f&#xff1a;\u9002\u7528\u4e8e\u7236\u7c7b\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u901a\u7528\u7684\u5b9e\u73b0&#xff0c;\u4f46\u5b50\u7c7b\u53ef\u80fd\u9700\u8981\u6839\u636e\u81ea\u8eab\u9700\u6c42\u8fdb\u884c\u6269\u5c55\u7684\u60c5\u51b5\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u62bd\u8c61\u65b9\u6cd5&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u65e0\u9ed8\u8ba4\u5b9e\u73b0&#xff1a;\u62bd\u8c61\u65b9\u6cd5\u6ca1\u6709\u5177\u4f53\u7684\u5b9e\u73b0&#xff0c;\u5b50\u7c7b\u5fc5\u987b\u63d0\u4f9b\u5177\u4f53\u7684\u5b9e\u73b0\u3002<\/p>\n<\/li>\n<li>\n<p>\u5f3a\u5236\u91cd\u5199&#xff1a;\u5b50\u7c7b\u5fc5\u987b\u91cd\u5199\u62bd\u8c61\u65b9\u6cd5&#xff0c;\u5426\u5219\u4f1a\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n<\/li>\n<li>\n<p>\u9002\u7528\u573a\u666f&#xff1a;\u9002\u7528\u4e8e\u7236\u7c7b\u65e0\u6cd5\u63d0\u4f9b\u4e00\u4e2a\u901a\u7528\u7684\u5b9e\u73b0&#xff0c;\u4f46\u9700\u8981\u786e\u4fdd\u5b50\u7c7b\u5b9e\u73b0\u7279\u5b9a\u884c\u4e3a\u7684\u60c5\u51b5\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>\u6ce8\u610f\u4e8b\u9879<\/h4>\n<ul>\n<li>\n<p>\u62bd\u8c61\u7c7b&#xff1a;\u62bd\u8c61\u65b9\u6cd5\u5fc5\u987b\u5b9a\u4e49\u5728\u62bd\u8c61\u7c7b\u4e2d&#xff0c;\u62bd\u8c61\u7c7b\u4e0d\u80fd\u88ab\u5b9e\u4f8b\u5316&#xff0c;\u53ea\u80fd\u88ab\u7ee7\u627f\u3002<\/p>\n<\/li>\n<li>\n<p>\u591a\u6001\u8c03\u7528&#xff1a;\u65e0\u8bba\u662f\u865a\u65b9\u6cd5\u8fd8\u662f\u62bd\u8c61\u65b9\u6cd5&#xff0c;\u901a\u8fc7\u7236\u7c7b\u7684\u5f15\u7528\u8c03\u7528\u65b9\u6cd5\u65f6&#xff0c;\u5b9e\u9645\u6267\u884c\u7684\u662f\u5b50\u7c7b\u4e2d\u91cd\u5199\u7684\u65b9\u6cd5\u3002<\/p>\n<\/li>\n<li>\n<p>\u6027\u80fd\u5f71\u54cd&#xff1a;\u865a\u65b9\u6cd5\u548c\u62bd\u8c61\u65b9\u6cd5\u7684\u8c03\u7528\u90fd\u4f1a\u5f15\u5165\u4e00\u5b9a\u7684\u6027\u80fd\u5f00\u9500&#xff0c;\u7279\u522b\u662f\u5728\u6d89\u53ca\u591a\u5c42\u7ee7\u627f\u548c\u9891\u7e41\u8c03\u7528\u65f6\u3002\u56e0\u6b64&#xff0c;\u9700\u8981\u5728\u6027\u80fd\u548c\u7075\u6d3b\u6027\u4e4b\u95f4\u8fdb\u884c\u6743\u8861\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>4. \u591a\u6001\u7684\u5e94\u7528\u573a\u666f<\/h2>\n<h3>4.1 \u7b80\u5316\u4ee3\u7801\u7ed3\u6784<\/h3>\n<p>\u591a\u6001\u80fd\u591f\u663e\u8457\u7b80\u5316\u4ee3\u7801\u7ed3\u6784&#xff0c;\u901a\u8fc7\u4f7f\u7528\u7edf\u4e00\u7684\u63a5\u53e3\u6765\u64cd\u4f5c\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61&#xff0c;\u51cf\u5c11\u4e86\u4ee3\u7801\u7684\u590d\u6742\u6027\u548c\u5197\u4f59\u6027\u3002<\/p>\n<ul>\n<li>\n<p>\u51cf\u5c11\u6761\u4ef6\u5224\u65ad&#xff1a;\u5728\u6ca1\u6709\u591a\u6001\u7684\u60c5\u51b5\u4e0b&#xff0c;\u7a0b\u5e8f\u4e2d\u5e38\u5e38\u9700\u8981\u5927\u91cf\u7684\u6761\u4ef6\u5224\u65ad\u6765\u533a\u5206\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61\u5e76\u8c03\u7528\u76f8\u5e94\u7684\u65b9\u6cd5\u3002\u800c\u4f7f\u7528\u591a\u6001\u540e&#xff0c;\u8fd9\u4e9b\u6761\u4ef6\u5224\u65ad\u53ef\u4ee5\u88ab\u6d88\u9664&#xff0c;\u901a\u8fc7\u7236\u7c7b\u7684\u5f15\u7528\u76f4\u63a5\u8c03\u7528\u65b9\u6cd5&#xff0c;\u7531\u8fd0\u884c\u65f6\u673a\u5236\u81ea\u52a8\u9009\u62e9\u5408\u9002\u7684\u5b9e\u73b0\u3002\u4f8b\u5982&#xff0c;\u5728\u4e00\u4e2a\u56fe\u5f62\u7ed8\u5236\u7a0b\u5e8f\u4e2d&#xff0c;\u5982\u679c\u6ca1\u6709\u591a\u6001&#xff0c;\u53ef\u80fd\u9700\u8981\u5982\u4e0b\u4ee3\u7801&#xff1a;<\/p>\n<\/li>\n<\/ul>\n<p>if (shape is Circle)<br \/>\n{<br \/>\n    DrawCircle(shape);<br \/>\n}<br \/>\nelse if (shape is Rectangle)<br \/>\n{<br \/>\n    DrawRectangle(shape);<br \/>\n}<\/p>\n<p>\u800c\u4f7f\u7528\u591a\u6001\u540e&#xff0c;\u53ea\u9700\u8981&#xff1a;<\/p>\n<p>shape.Draw();<\/p>\n<ul>\n<li>\n<p>\u7edf\u4e00\u63a5\u53e3&#xff1a;\u591a\u6001\u5141\u8bb8\u4f7f\u7528\u4e00\u4e2a\u7edf\u4e00\u7684\u63a5\u53e3\u6765\u64cd\u4f5c\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61&#xff0c;\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u548c\u4e00\u81f4\u3002\u5f00\u53d1\u8005\u53ef\u4ee5\u4e13\u6ce8\u4e8e\u5b9a\u4e49\u901a\u7528\u7684\u63a5\u53e3&#xff0c;\u800c\u5c06\u5177\u4f53\u7684\u5b9e\u73b0\u7ec6\u8282\u7559\u7ed9\u5b50\u7c7b\u3002\u4f8b\u5982&#xff0c;\u5b9a\u4e49\u4e00\u4e2a Animal \u63a5\u53e3&#xff0c;\u5176\u4e2d\u5305\u542b MakeSound \u65b9\u6cd5&#xff0c;\u4e0d\u540c\u7684\u52a8\u7269\u7c7b\u5b9e\u73b0\u8be5\u63a5\u53e3\u5e76\u63d0\u4f9b\u81ea\u5df1\u7684\u58f0\u97f3\u5b9e\u73b0\u3002\u5728\u8c03\u7528\u65f6&#xff0c;\u53ea\u9700\u8981\u901a\u8fc7 Animal \u63a5\u53e3\u8c03\u7528 MakeSound \u65b9\u6cd5&#xff0c;\u800c\u65e0\u9700\u5173\u5fc3\u5177\u4f53\u662f\u54ea\u79cd\u52a8\u7269\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>4.2 \u63d0\u9ad8\u4ee3\u7801\u53ef\u7ef4\u62a4\u6027<\/h3>\n<p>\u591a\u6001\u4e0d\u4ec5\u7b80\u5316\u4e86\u4ee3\u7801\u7ed3\u6784&#xff0c;\u8fd8\u663e\u8457\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027&#xff0c;\u4f7f\u5f97\u4ee3\u7801\u66f4\u5bb9\u6613\u6269\u5c55\u548c\u4fee\u6539\u3002<\/p>\n<ul>\n<li>\n<p>\u6613\u4e8e\u6269\u5c55&#xff1a;\u5f53\u9700\u8981\u6dfb\u52a0\u65b0\u7684\u529f\u80fd\u6216\u65b0\u7684\u5bf9\u8c61\u7c7b\u578b\u65f6&#xff0c;\u591a\u6001\u4f7f\u5f97\u4ee3\u7801\u7684\u6269\u5c55\u53d8\u5f97\u975e\u5e38\u7b80\u5355\u3002\u53ea\u9700\u8981\u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684\u5b50\u7c7b\u5e76\u5b9e\u73b0\u76f8\u5e94\u7684\u65b9\u6cd5&#xff0c;\u800c\u65e0\u9700\u4fee\u6539\u73b0\u6709\u7684\u4ee3\u7801\u3002\u4f8b\u5982&#xff0c;\u5728\u4e0a\u8ff0\u56fe\u5f62\u7ed8\u5236\u7a0b\u5e8f\u4e2d&#xff0c;\u5982\u679c\u9700\u8981\u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684\u56fe\u5f62\u7c7b\u578b&#xff0c;\u5982\u4e09\u89d2\u5f62&#xff0c;\u53ea\u9700\u8981\u521b\u5efa\u4e00\u4e2a Triangle \u7c7b\u5e76\u5b9e\u73b0 Draw \u65b9\u6cd5&#xff0c;\u800c\u65e0\u9700\u4fee\u6539\u73b0\u6709\u7684\u7ed8\u5236\u903b\u8f91\u4ee3\u7801\u3002<\/p>\n<\/li>\n<li>\n<p>\u964d\u4f4e\u8026\u5408\u5ea6&#xff1a;\u591a\u6001\u964d\u4f4e\u4e86\u4ee3\u7801\u4e4b\u95f4\u7684\u8026\u5408\u5ea6&#xff0c;\u4f7f\u5f97\u5404\u4e2a\u90e8\u5206\u4e4b\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb\u66f4\u52a0\u677e\u6563\u3002\u7236\u7c7b\u548c\u5b50\u7c7b\u4e4b\u95f4\u901a\u8fc7\u63a5\u53e3\u8fdb\u884c\u4ea4\u4e92&#xff0c;\u800c\u4e0d\u9700\u8981\u76f4\u63a5\u4f9d\u8d56\u5177\u4f53\u7684\u5b9e\u73b0\u3002\u8fd9\u79cd\u677e\u8026\u5408\u7684\u8bbe\u8ba1\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u7075\u6d3b&#xff0c;\u66f4\u5bb9\u6613\u8fdb\u884c\u5355\u5143\u6d4b\u8bd5\u548c\u91cd\u6784\u3002\u4f8b\u5982&#xff0c;Animal \u7c7b\u548c\u5b83\u7684\u5b50\u7c7b\u4e4b\u95f4\u901a\u8fc7\u865a\u65b9\u6cd5 MakeSound \u8fdb\u884c\u4ea4\u4e92&#xff0c;\u7236\u7c7b\u4e0d\u9700\u8981\u77e5\u9053\u5b50\u7c7b\u7684\u5177\u4f53\u5b9e\u73b0\u7ec6\u8282&#xff0c;\u5b50\u7c7b\u4e5f\u53ef\u4ee5\u72ec\u7acb\u5730\u8fdb\u884c\u4fee\u6539\u548c\u6269\u5c55\u3002<\/p>\n<\/li>\n<li>\n<p>\u4fbf\u4e8e\u4fee\u6539&#xff1a;\u7531\u4e8e\u591a\u6001\u5c06\u5177\u4f53\u5b9e\u73b0\u7ec6\u8282\u5c01\u88c5\u5728\u5b50\u7c7b\u4e2d&#xff0c;\u5f53\u9700\u8981\u4fee\u6539\u67d0\u4e2a\u529f\u80fd\u65f6&#xff0c;\u53ea\u9700\u8981\u4fee\u6539\u76f8\u5e94\u7684\u5b50\u7c7b&#xff0c;\u800c\u65e0\u9700\u4fee\u6539\u8c03\u7528\u8be5\u529f\u80fd\u7684\u4ee3\u7801\u3002\u8fd9\u79cd\u5c40\u90e8\u4fee\u6539\u7684\u65b9\u5f0f\u4f7f\u5f97\u4ee3\u7801\u7684\u7ef4\u62a4\u66f4\u52a0\u65b9\u4fbf\u548c\u9ad8\u6548\u3002\u4f8b\u5982&#xff0c;\u5982\u679c\u9700\u8981\u4fee\u6539 Dog \u7c7b\u7684 MakeSound \u65b9\u6cd5&#xff0c;\u53ea\u9700\u8981\u4fee\u6539 Dog \u7c7b\u4e2d\u7684\u4ee3\u7801&#xff0c;\u800c\u65e0\u9700\u4fee\u6539\u8c03\u7528\u8be5\u65b9\u6cd5\u7684\u4ee3\u7801\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>5. \u591a\u6001\u7684\u5b9e\u73b0\u7ec6\u8282<\/h2>\n<h3>5.1 \u865a\u65b9\u6cd5\u7684\u4f7f\u7528<\/h3>\n<p>\u865a\u65b9\u6cd5\u662f\u5b9e\u73b0\u8fd0\u884c\u65f6\u591a\u6001\u7684\u5173\u952e\u673a\u5236\u4e4b\u4e00\u3002\u5728 C# \u4e2d&#xff0c;\u901a\u8fc7\u5728\u7236\u7c7b\u4e2d\u4f7f\u7528 virtual \u5173\u952e\u5b57\u58f0\u660e\u65b9\u6cd5&#xff0c;\u53ef\u4ee5\u5728\u5b50\u7c7b\u4e2d\u4f7f\u7528 override \u5173\u952e\u5b57\u91cd\u5199\u8be5\u65b9\u6cd5\u3002\u5f53\u901a\u8fc7\u7236\u7c7b\u7684\u5f15\u7528\u8c03\u7528\u8be5\u65b9\u6cd5\u65f6&#xff0c;\u8fd0\u884c\u65f6\u4f1a\u6839\u636e\u5b9e\u9645\u5bf9\u8c61\u7684\u7c7b\u578b\u9009\u62e9\u6267\u884c\u5b50\u7c7b\u4e2d\u91cd\u5199\u7684\u65b9\u6cd5\u3002<\/p>\n<h4>\u865a\u65b9\u6cd5\u7684\u7279\u6027<\/h4>\n<ul>\n<li>\n<p>\u52a8\u6001\u7ed1\u5b9a&#xff1a;\u865a\u65b9\u6cd5\u7684\u8c03\u7528\u662f\u5728\u8fd0\u884c\u65f6\u6839\u636e\u5bf9\u8c61\u7684\u5b9e\u9645\u7c7b\u578b\u6765\u786e\u5b9a\u7684&#xff0c;\u800c\u4e0d\u662f\u5728\u7f16\u8bd1\u65f6\u3002\u8fd9\u4f7f\u5f97\u7a0b\u5e8f\u5177\u6709\u66f4\u9ad8\u7684\u7075\u6d3b\u6027\u548c\u6269\u5c55\u6027\u3002<\/p>\n<\/li>\n<li>\n<p>\u9ed8\u8ba4\u5b9e\u73b0&#xff1a;\u865a\u65b9\u6cd5\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u9ed8\u8ba4\u7684\u5b9e\u73b0&#xff0c;\u5b50\u7c7b\u53ef\u4ee5\u9009\u62e9\u6027\u5730\u91cd\u5199\u8be5\u65b9\u6cd5\u3002\u5982\u679c\u5b50\u7c7b\u6ca1\u6709\u91cd\u5199\u865a\u65b9\u6cd5&#xff0c;\u5219\u4f1a\u7ee7\u627f\u7236\u7c7b\u4e2d\u7684\u9ed8\u8ba4\u5b9e\u73b0\u3002<\/p>\n<\/li>\n<\/ul>\n<h5>\u793a\u4f8b\u4ee3\u7801<\/h5>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u865a\u65b9\u6cd5\u7684\u793a\u4f8b&#xff0c;\u5c55\u793a\u4e86\u5982\u4f55\u5728\u7236\u7c7b\u4e2d\u5b9a\u4e49\u865a\u65b9\u6cd5&#xff0c;\u5e76\u5728\u5b50\u7c7b\u4e2d\u91cd\u5199\u8be5\u65b9\u6cd5&#xff1a;<\/p>\n<p>public class Animal<br \/>\n{<br \/>\n    public virtual void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Animal makes a sound&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Dog : Animal<br \/>\n{<br \/>\n    public override void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Dog barks&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Cat : Animal<br \/>\n{<br \/>\n    public override void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Cat meows&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Program<br \/>\n{<br \/>\n    public static void Main()<br \/>\n    {<br \/>\n        Animal myDog &#061; new Dog();<br \/>\n        Animal myCat &#061; new Cat();<\/p>\n<p>        myDog.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Dog barks<br \/>\n        myCat.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Cat meows<br \/>\n    }<br \/>\n}<\/p>\n<h4>\u865a\u65b9\u6cd5\u7684\u6ce8\u610f\u4e8b\u9879<\/h4>\n<ul>\n<li>\n<p>\u6027\u80fd\u5f00\u9500&#xff1a;\u865a\u65b9\u6cd5\u7684\u8c03\u7528\u4f1a\u5f15\u5165\u4e00\u5b9a\u7684\u6027\u80fd\u5f00\u9500&#xff0c;\u56e0\u4e3a\u8fd0\u884c\u65f6\u9700\u8981\u52a8\u6001\u7ed1\u5b9a\u3002\u5728\u6027\u80fd\u654f\u611f\u7684\u573a\u666f\u4e2d&#xff0c;\u9700\u8981\u8c28\u614e\u4f7f\u7528\u865a\u65b9\u6cd5\u3002<\/p>\n<\/li>\n<li>\n<p>\u8c03\u7528\u7236\u7c7b\u65b9\u6cd5&#xff1a;\u5728\u5b50\u7c7b\u4e2d\u91cd\u5199\u7236\u7c7b\u7684\u865a\u65b9\u6cd5\u65f6&#xff0c;\u53ef\u4ee5\u901a\u8fc7 base \u5173\u952e\u5b57\u8c03\u7528\u7236\u7c7b\u4e2d\u7684\u65b9\u6cd5&#xff0c;\u4ee5\u4fbf\u5728\u5b50\u7c7b\u7684\u5b9e\u73b0\u4e2d\u4fdd\u7559\u7236\u7c7b\u7684\u884c\u4e3a\u3002<\/p>\n<\/li>\n<li>\n<p>\u907f\u514d\u8fc7\u5ea6\u4f7f\u7528&#xff1a;\u867d\u7136\u865a\u65b9\u6cd5\u63d0\u4f9b\u4e86\u7075\u6d3b\u6027&#xff0c;\u4f46\u8fc7\u5ea6\u4f7f\u7528\u53ef\u80fd\u4f1a\u4f7f\u4ee3\u7801\u7ed3\u6784\u53d8\u5f97\u590d\u6742&#xff0c;\u96be\u4ee5\u7ef4\u62a4\u3002\u56e0\u6b64&#xff0c;\u5e94\u6839\u636e\u5b9e\u9645\u9700\u6c42\u5408\u7406\u4f7f\u7528\u865a\u65b9\u6cd5\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>5.2 \u62bd\u8c61\u7c7b\u4e0e\u63a5\u53e3<\/h3>\n<p>\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3\u662f\u5b9e\u73b0\u591a\u6001\u7684\u4e24\u79cd\u91cd\u8981\u65b9\u5f0f&#xff0c;\u5b83\u4eec\u90fd\u5141\u8bb8\u5b9a\u4e49\u901a\u7528\u7684\u884c\u4e3a&#xff0c;\u4f46\u4f7f\u7528\u573a\u666f\u548c\u8bed\u4e49\u6709\u6240\u4e0d\u540c\u3002<\/p>\n<h4>\u62bd\u8c61\u7c7b<\/h4>\n<p>\u62bd\u8c61\u7c7b\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u7c7b&#xff0c;\u5b83\u4e0d\u80fd\u88ab\u5b9e\u4f8b\u5316&#xff0c;\u53ea\u80fd\u88ab\u7ee7\u627f\u3002\u62bd\u8c61\u7c7b\u53ef\u4ee5\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\u548c\u865a\u65b9\u6cd5&#xff0c;\u62bd\u8c61\u65b9\u6cd5\u6ca1\u6709\u5177\u4f53\u7684\u5b9e\u73b0&#xff0c;\u5b50\u7c7b\u5fc5\u987b\u63d0\u4f9b\u5177\u4f53\u7684\u5b9e\u73b0\u3002<\/p>\n<h5>\u62bd\u8c61\u7c7b\u7684\u7279\u6027<\/h5>\n<ul>\n<li>\n<p>\u5f3a\u5236\u5b9e\u73b0&#xff1a;\u62bd\u8c61\u7c7b\u4e2d\u7684\u62bd\u8c61\u65b9\u6cd5\u6ca1\u6709\u5177\u4f53\u7684\u5b9e\u73b0&#xff0c;\u5b50\u7c7b\u5fc5\u987b\u5b9e\u73b0\u8fd9\u4e9b\u62bd\u8c61\u65b9\u6cd5&#xff0c;\u5426\u5219\u4f1a\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n<\/li>\n<li>\n<p>\u9ed8\u8ba4\u5b9e\u73b0&#xff1a;\u62bd\u8c61\u7c7b\u53ef\u4ee5\u5305\u542b\u975e\u62bd\u8c61\u65b9\u6cd5&#xff0c;\u63d0\u4f9b\u9ed8\u8ba4\u7684\u5b9e\u73b0&#xff0c;\u5b50\u7c7b\u53ef\u4ee5\u9009\u62e9\u6027\u5730\u91cd\u5199\u8fd9\u4e9b\u65b9\u6cd5\u3002<\/p>\n<\/li>\n<li>\n<p>\u591a\u6001\u652f\u6301&#xff1a;\u62bd\u8c61\u7c7b\u652f\u6301\u8fd0\u884c\u65f6\u591a\u6001&#xff0c;\u901a\u8fc7\u7236\u7c7b\u7684\u5f15\u7528\u53ef\u4ee5\u8c03\u7528\u5b50\u7c7b\u4e2d\u91cd\u5199\u7684\u65b9\u6cd5\u3002<\/p>\n<\/li>\n<\/ul>\n<h5>\u793a\u4f8b\u4ee3\u7801<\/h5>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u62bd\u8c61\u7c7b\u7684\u793a\u4f8b&#xff0c;\u5c55\u793a\u4e86\u5982\u4f55\u5b9a\u4e49\u62bd\u8c61\u7c7b\u548c\u62bd\u8c61\u65b9\u6cd5&#xff0c;\u5e76\u5728\u5b50\u7c7b\u4e2d\u5b9e\u73b0\u8fd9\u4e9b\u65b9\u6cd5&#xff1a;<\/p>\n<p>public abstract class Animal<br \/>\n{<br \/>\n    public abstract void MakeSound();<\/p>\n<p>    public virtual void Sleep()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Animal sleeps&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Dog : Animal<br \/>\n{<br \/>\n    public override void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Dog barks&#034;);<br \/>\n    }<\/p>\n<p>    public override void Sleep()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Dog sleeps&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Cat : Animal<br \/>\n{<br \/>\n    public override void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Cat meows&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Program<br \/>\n{<br \/>\n    public static void Main()<br \/>\n    {<br \/>\n        Animal myDog &#061; new Dog();<br \/>\n        Animal myCat &#061; new Cat();<\/p>\n<p>        myDog.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Dog barks<br \/>\n        myDog.Sleep();     \/\/ \u8f93\u51fa&#xff1a;Dog sleeps<\/p>\n<p>        myCat.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Cat meows<br \/>\n        myCat.Sleep();     \/\/ \u8f93\u51fa&#xff1a;Animal sleeps<br \/>\n    }<br \/>\n}<\/p>\n<h4>\u63a5\u53e3<\/h4>\n<p>\u63a5\u53e3\u662f\u4e00\u79cd\u5b8c\u5168\u62bd\u8c61\u7684\u7c7b\u578b&#xff0c;\u5b83\u53ea\u5b9a\u4e49\u4e86\u4e00\u7ec4\u65b9\u6cd5\u548c\u5c5e\u6027\u7684\u7b7e\u540d&#xff0c;\u4f46\u4e0d\u63d0\u4f9b\u5177\u4f53\u7684\u5b9e\u73b0\u3002\u63a5\u53e3\u53ef\u4ee5\u88ab\u7c7b\u5b9e\u73b0&#xff0c;\u5b9e\u73b0\u7c7b\u5fc5\u987b\u63d0\u4f9b\u63a5\u53e3\u4e2d\u6240\u6709\u65b9\u6cd5\u7684\u5177\u4f53\u5b9e\u73b0\u3002<\/p>\n<h5>\u63a5\u53e3\u7684\u7279\u6027<\/h5>\n<ul>\n<li>\n<p>\u5b8c\u5168\u62bd\u8c61&#xff1a;\u63a5\u53e3\u4e2d\u7684\u6240\u6709\u65b9\u6cd5\u90fd\u662f\u62bd\u8c61\u7684&#xff0c;\u6ca1\u6709\u5177\u4f53\u7684\u5b9e\u73b0\u3002<\/p>\n<\/li>\n<li>\n<p>\u591a\u7ee7\u627f&#xff1a;\u7c7b\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3&#xff0c;\u4ece\u800c\u652f\u6301\u591a\u7ee7\u627f\u3002<\/p>\n<\/li>\n<li>\n<p>\u591a\u6001\u652f\u6301&#xff1a;\u63a5\u53e3\u652f\u6301\u8fd0\u884c\u65f6\u591a\u6001&#xff0c;\u901a\u8fc7\u63a5\u53e3\u7684\u5f15\u7528\u53ef\u4ee5\u8c03\u7528\u5b9e\u73b0\u7c7b\u4e2d\u5b9e\u73b0\u7684\u65b9\u6cd5\u3002<\/p>\n<\/li>\n<\/ul>\n<h5>\u793a\u4f8b\u4ee3\u7801<\/h5>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u63a5\u53e3\u7684\u793a\u4f8b&#xff0c;\u5c55\u793a\u4e86\u5982\u4f55\u5b9a\u4e49\u63a5\u53e3&#xff0c;\u5e76\u5728\u7c7b\u4e2d\u5b9e\u73b0\u63a5\u53e3&#xff1a;<\/p>\n<p>public interface IAnimal<br \/>\n{<br \/>\n    void MakeSound();<br \/>\n}<\/p>\n<p>public class Dog : IAnimal<br \/>\n{<br \/>\n    public void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Dog barks&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Cat : IAnimal<br \/>\n{<br \/>\n    public void MakeSound()<br \/>\n    {<br \/>\n        Console.WriteLine(&#034;Cat meows&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>public class Program<br \/>\n{<br \/>\n    public static void Main()<br \/>\n    {<br \/>\n        IAnimal myDog &#061; new Dog();<br \/>\n        IAnimal myCat &#061; new Cat();<\/p>\n<p>        myDog.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Dog barks<br \/>\n        myCat.MakeSound(); \/\/ \u8f93\u51fa&#xff1a;Cat meows<br \/>\n    }<br \/>\n}<\/p>\n<h4>\u62bd\u8c61\u7c7b\u4e0e\u63a5\u53e3\u7684\u6bd4\u8f83<\/h4>\n<ul>\n<li>\n<p>\u62bd\u8c61\u7c7b&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u9ed8\u8ba4\u5b9e\u73b0&#xff1a;\u53ef\u4ee5\u5305\u542b\u975e\u62bd\u8c61\u65b9\u6cd5&#xff0c;\u63d0\u4f9b\u9ed8\u8ba4\u7684\u5b9e\u73b0\u3002<\/p>\n<\/li>\n<li>\n<p>\u72b6\u6001\u5171\u4eab&#xff1a;\u53ef\u4ee5\u5305\u542b\u5b57\u6bb5\u548c\u5c5e\u6027&#xff0c;\u5141\u8bb8\u5b50\u7c7b\u5171\u4eab\u72b6\u6001\u3002<\/p>\n<\/li>\n<li>\n<p>\u9002\u7528\u573a\u666f&#xff1a;\u9002\u7528\u4e8e\u7236\u7c7b\u53ef\u4ee5\u63d0\u4f9b\u901a\u7528\u5b9e\u73b0&#xff0c;\u4f46\u5b50\u7c7b\u9700\u8981\u6269\u5c55\u7684\u60c5\u51b5\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u63a5\u53e3&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5b8c\u5168\u62bd\u8c61&#xff1a;\u6240\u6709\u65b9\u6cd5\u90fd\u662f\u62bd\u8c61\u7684&#xff0c;\u6ca1\u6709\u9ed8\u8ba4\u5b9e\u73b0\u3002<\/p>\n<\/li>\n<li>\n<p>\u591a\u7ee7\u627f&#xff1a;\u7c7b\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3&#xff0c;\u652f\u6301\u591a\u7ee7\u627f\u3002<\/p>\n<\/li>\n<li>\n<p>\u9002\u7528\u573a\u666f&#xff1a;\u9002\u7528\u4e8e\u5b9a\u4e49\u4e00\u7ec4\u884c\u4e3a\u89c4\u8303&#xff0c;\u4f46\u4e0d\u9700\u8981\u63d0\u4f9b\u901a\u7528\u5b9e\u73b0\u7684\u60c5\u51b5\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>\u6ce8\u610f\u4e8b\u9879<\/h4>\n<ul>\n<li>\n<p>\u9009\u62e9\u5408\u9002\u7684\u62bd\u8c61\u65b9\u5f0f&#xff1a;\u6839\u636e\u5b9e\u9645\u9700\u6c42\u9009\u62e9\u62bd\u8c61\u7c7b\u6216\u63a5\u53e3\u3002\u5982\u679c\u9700\u8981\u63d0\u4f9b\u9ed8\u8ba4\u5b9e\u73b0&#xff0c;\u4f7f\u7528\u62bd\u8c61\u7c7b&#xff1b;\u5982\u679c\u9700\u8981\u5b9a\u4e49\u4e00\u7ec4\u884c\u4e3a\u89c4\u8303&#xff0c;\u4f7f\u7528\u63a5\u53e3\u3002<\/p>\n<\/li>\n<li>\n<p>\u63a5\u53e3\u7684\u6269\u5c55&#xff1a;\u63a5\u53e3\u4e00\u65e6\u53d1\u5e03&#xff0c;\u5f88\u96be\u4fee\u6539\u3002\u5982\u679c\u9700\u8981\u6269\u5c55\u63a5\u53e3\u7684\u529f\u80fd&#xff0c;\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u65b0\u7684\u63a5\u53e3&#xff0c;\u8ba9\u7c7b\u540c\u65f6\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3\u3002<\/p>\n<\/li>\n<li>\n<p>\u6027\u80fd\u5f71\u54cd&#xff1a;\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3\u7684\u8c03\u7528\u90fd\u4f1a\u5f15\u5165\u4e00\u5b9a\u7684\u6027\u80fd\u5f00\u9500&#xff0c;\u7279\u522b\u662f\u5728\u6d89\u53ca\u591a\u5c42\u7ee7\u627f\u548c\u9891\u7e41\u8c03\u7528\u65f6\u3002\u56e0\u6b64&#xff0c;\u9700\u8981\u5728\u6027\u80fd\u548c\u7075\u6d3b\u6027\u4e4b\u95f4\u8fdb\u884c\u6743\u8861\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>6. \u591a\u6001\u7684\u6ce8\u610f\u4e8b\u9879<\/h2>\n<h3>6.1 \u907f\u514d\u8fc7\u5ea6\u4f7f\u7528\u591a\u6001<\/h3>\n<p>\u591a\u6001\u867d\u7136\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u7075\u6d3b\u6027\u548c\u6269\u5c55\u6027&#xff0c;\u4f46\u8fc7\u5ea6\u4f7f\u7528\u53ef\u80fd\u4f1a\u5e26\u6765\u4e00\u7cfb\u5217\u95ee\u9898&#xff0c;\u9700\u8981\u8c28\u614e\u6743\u8861\u3002<\/p>\n<ul>\n<li>\n<p>\u589e\u52a0\u4ee3\u7801\u590d\u6742\u6027&#xff1a;\u8fc7\u5ea6\u4f7f\u7528\u591a\u6001\u53ef\u80fd\u5bfc\u81f4\u7c7b\u5c42\u6b21\u7ed3\u6784\u53d8\u5f97\u8fc7\u4e8e\u590d\u6742&#xff0c;\u589e\u52a0\u4ee3\u7801\u7684\u9605\u8bfb\u548c\u7406\u89e3\u96be\u5ea6\u3002\u4f8b\u5982&#xff0c;\u5f53\u5b58\u5728\u591a\u5c42\u7ee7\u627f\u548c\u5927\u91cf\u865a\u65b9\u6cd5\u65f6&#xff0c;\u5f00\u53d1\u8005\u53ef\u80fd\u96be\u4ee5\u8ffd\u8e2a\u65b9\u6cd5\u7684\u5177\u4f53\u5b9e\u73b0\u8def\u5f84&#xff0c;\u4ece\u800c\u964d\u4f4e\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n<\/li>\n<li>\n<p>\u964d\u4f4e\u6027\u80fd&#xff1a;\u591a\u6001\u7684\u5b9e\u73b0\u4f9d\u8d56\u4e8e\u52a8\u6001\u7ed1\u5b9a&#xff0c;\u8fd0\u884c\u65f6\u9700\u8981\u8fdb\u884c\u7c7b\u578b\u68c0\u67e5\u548c\u65b9\u6cd5\u67e5\u627e&#xff0c;\u8fd9\u4f1a\u5f15\u5165\u989d\u5916\u7684\u6027\u80fd\u5f00\u9500\u3002\u7279\u522b\u662f\u5728\u6d89\u53ca\u5927\u91cf\u5bf9\u8c61\u548c\u9891\u7e41\u8c03\u7528\u865a\u65b9\u6cd5\u7684\u573a\u666f\u4e2d&#xff0c;\u6027\u80fd\u5f71\u54cd\u53ef\u80fd\u8f83\u4e3a\u660e\u663e\u3002\u4f8b\u5982&#xff0c;\u5728\u4e00\u4e2a\u9ad8\u6027\u80fd\u8ba1\u7b97\u5e94\u7528\u4e2d&#xff0c;\u8fc7\u591a\u7684\u865a\u65b9\u6cd5\u8c03\u7528\u53ef\u80fd\u4f1a\u6210\u4e3a\u6027\u80fd\u74f6\u9888\u3002<\/p>\n<\/li>\n<li>\n<p>\u9690\u85cf\u95ee\u9898&#xff1a;\u591a\u6001\u53ef\u80fd\u4f1a\u9690\u85cf\u4e00\u4e9b\u6f5c\u5728\u7684\u95ee\u9898&#xff0c;\u4f7f\u5f97\u95ee\u9898\u96be\u4ee5\u53d1\u73b0\u548c\u8c03\u8bd5\u3002\u4f8b\u5982&#xff0c;\u5f53\u5b50\u7c7b\u91cd\u5199\u4e86\u7236\u7c7b\u7684\u865a\u65b9\u6cd5&#xff0c;\u4f46\u6ca1\u6709\u6b63\u786e\u5904\u7406\u7236\u7c7b\u7684\u903b\u8f91\u65f6&#xff0c;\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8fd0\u884c\u65f6\u9519\u8bef\u6216\u5f02\u5e38\u884c\u4e3a&#xff0c;\u800c\u8fd9\u4e9b\u95ee\u9898\u5728\u7f16\u8bd1\u65f6\u53ef\u80fd\u65e0\u6cd5\u88ab\u68c0\u6d4b\u5230\u3002<\/p>\n<\/li>\n<li>\n<p>\u589e\u52a0\u6d4b\u8bd5\u96be\u5ea6&#xff1a;\u591a\u6001\u4f7f\u5f97\u4ee3\u7801\u7684\u884c\u4e3a\u66f4\u52a0\u52a8\u6001&#xff0c;\u589e\u52a0\u4e86\u6d4b\u8bd5\u7684\u590d\u6742\u6027\u548c\u96be\u5ea6\u3002\u9700\u8981\u5bf9\u6bcf\u4e2a\u5b50\u7c7b\u7684\u5b9e\u73b0\u8fdb\u884c\u5355\u72ec\u6d4b\u8bd5&#xff0c;\u540c\u65f6\u8fd8\u8981\u6d4b\u8bd5\u7236\u7c7b\u548c\u5b50\u7c7b\u4e4b\u95f4\u7684\u4ea4\u4e92&#xff0c;\u8fd9\u53ef\u80fd\u5bfc\u81f4\u6d4b\u8bd5\u5de5\u4f5c\u91cf\u5927\u5e45\u589e\u52a0\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u56e0\u6b64&#xff0c;\u5728\u4f7f\u7528\u591a\u6001\u65f6&#xff0c;\u5e94\u6839\u636e\u5b9e\u9645\u9700\u6c42\u5408\u7406\u8bbe\u8ba1\u7c7b\u7684\u5c42\u6b21\u7ed3\u6784&#xff0c;\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u591a\u6001\u8bbe\u8ba1\u3002\u4f8b\u5982&#xff0c;\u5728\u4e00\u4e9b\u7b80\u5355\u573a\u666f\u4e2d&#xff0c;\u53ef\u4ee5\u4f7f\u7528\u7b80\u5355\u7684\u6761\u4ef6\u5224\u65ad\u6765\u66ff\u4ee3\u591a\u6001&#xff0c;\u4ece\u800c\u63d0\u9ad8\u4ee3\u7801\u7684\u6548\u7387\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n<h3>6.2 \u6ce8\u610f\u6027\u80fd\u5f71\u54cd<\/h3>\n<p>\u591a\u6001\u7684\u5b9e\u73b0\u673a\u5236\u4f1a\u5f15\u5165\u4e00\u5b9a\u7684\u6027\u80fd\u5f00\u9500&#xff0c;\u7279\u522b\u662f\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u7ed1\u5b9a\u7684\u8fc7\u7a0b\u4e2d\u3002\u56e0\u6b64&#xff0c;\u5728\u6027\u80fd\u654f\u611f\u7684\u5e94\u7528\u4e2d&#xff0c;\u9700\u8981\u7279\u522b\u6ce8\u610f\u591a\u6001\u5bf9\u6027\u80fd\u7684\u5f71\u54cd\u3002<\/p>\n<ul>\n<li>\n<p>\u865a\u65b9\u6cd5\u8c03\u7528\u7684\u5f00\u9500&#xff1a;\u865a\u65b9\u6cd5\u7684\u8c03\u7528\u9700\u8981\u5728\u8fd0\u884c\u65f6\u8fdb\u884c\u7c7b\u578b\u68c0\u67e5\u548c\u65b9\u6cd5\u8868\u67e5\u627e&#xff0c;\u8fd9\u6bd4\u76f4\u63a5\u8c03\u7528\u975e\u865a\u65b9\u6cd5\u8981\u6162\u3002\u867d\u7136\u73b0\u4ee3\u7f16\u8bd1\u5668\u548c\u8fd0\u884c\u65f6\u73af\u5883\u4f1a\u8fdb\u884c\u4e00\u4e9b\u4f18\u5316&#xff0c;\u4f46\u5728\u67d0\u4e9b\u9ad8\u6027\u80fd\u8981\u6c42\u7684\u573a\u666f\u4e2d&#xff0c;\u8fd9\u79cd\u5f00\u9500\u4ecd\u7136\u4e0d\u53ef\u5ffd\u89c6\u3002\u4f8b\u5982&#xff0c;\u5728\u5b9e\u65f6\u7cfb\u7edf\u6216\u9ad8\u9891\u4ea4\u6613\u7cfb\u7edf\u4e2d&#xff0c;\u865a\u65b9\u6cd5\u8c03\u7528\u7684\u5f00\u9500\u53ef\u80fd\u4f1a\u5bf9\u7cfb\u7edf\u7684\u54cd\u5e94\u65f6\u95f4\u548c\u541e\u5410\u91cf\u4ea7\u751f\u663e\u8457\u5f71\u54cd\u3002<\/p>\n<\/li>\n<li>\n<p>\u591a\u6001\u5bf9\u8c61\u7684\u5185\u5b58\u5f00\u9500&#xff1a;\u591a\u6001\u5bf9\u8c61\u901a\u5e38\u9700\u8981\u5b58\u50a8\u989d\u5916\u7684\u7c7b\u578b\u4fe1\u606f\u548c\u65b9\u6cd5\u8868\u6307\u9488&#xff0c;\u8fd9\u4f1a\u589e\u52a0\u5bf9\u8c61\u7684\u5185\u5b58\u5360\u7528\u3002\u5728\u5185\u5b58\u53d7\u9650\u7684\u73af\u5883\u4e2d&#xff0c;\u5982\u5d4c\u5165\u5f0f\u7cfb\u7edf\u6216\u79fb\u52a8\u8bbe\u5907&#xff0c;\u8fc7\u591a\u7684\u591a\u6001\u5bf9\u8c61\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u4e0d\u8db3\u7684\u95ee\u9898\u3002<\/p>\n<\/li>\n<li>\n<p>\u6027\u80fd\u4f18\u5316\u7b56\u7565&#xff1a;\u5728\u9700\u8981\u4f7f\u7528\u591a\u6001\u4f46\u53c8\u62c5\u5fc3\u6027\u80fd\u95ee\u9898\u65f6&#xff0c;\u53ef\u4ee5\u91c7\u53d6\u4e00\u4e9b\u4f18\u5316\u7b56\u7565\u3002\u4f8b\u5982&#xff0c;\u53ef\u4ee5\u4f7f\u7528\u5185\u8054\u65b9\u6cd5&#xff08;Inline 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