虚函数的意义 

 1 /* 虚函数的意义 */
 2 
 3 #include<iostream>
 4 #include<cstdlib>
 5 
 6 using namespace std;
 7 
 8 
 9 class myinterface
10 {
11 public:
12     virtual void server()
13     {
14         cout << "请找奶妈" << endl;
15     }
16 };
17 
18 
19 class apple : public myinterface
20 {
21 public:
22     void server()
23     {
24         cout << "请吃苹果" << endl;
25     }
26 };
27 
28 class orange : public myinterface
29 {
30 public:
31     void server()
32     {
33         cout << "请吃橘子" << endl;
34     }
35 };
36 
37 class cow : public myinterface
38 {
39 public:
40     void server()
41     {
42         cout << "请吃奶牛的奶" << endl;
43     }
44 };
45 
46 
47 class rennai : public myinterface
48 {
49 public:
50     void server()
51     {
52         cout << "请吃奶牛妈的奶" << endl;
53     }
54 };
55 
56 
57 
58 void main()
59 {
60     myinterface *p = nullptr;
61     
62     p = new cow;
63 
64     p->server();// 一个接口实现很多个功能
65 
66     cin.get();
67 }

 

posted on 2015-06-09 23:31  Dragon-wuxl  阅读(143)  评论(0)    收藏  举报

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