友元关系

569529989

代码编译不过！

1. #include <iostream>
   
2. #include <string>
   
3. 
   
4. class Lovers
   
5. {
   
6. public:
   
7.     Lovers(std::string theName);
   
8.     void kiss(Lovers *lover);
   
9.     void ask(Lovers *lover, std::string something);
   
10. 
    
11. protected:
    
12.     std::string name;
    
13. 
    
14.     friend class Others;
    
15. };
    
16. 
    
17. class Boyfriend : public Lovers
    
18. {
    
19. public:
    
20.     Boyfriend(std::string theName);
    
21. };
    
22. 
    
23. class Girlfriend : public Lovers
    
24. {
    
25. public:
    
26.     Girlfriend(std::string theName);
    
27. };
    
28. 
    
29. class Others
    
30. {
    
31. public:
    
32.     Others(std::string theName);
    
33.     void kiss(Lovers *lover);
    
34. 
    
35. protected:
    
36.     std::string name;
    
37. };
    
38. 
    
39. Lovers::Lovers(std::string theName)
    
40. {
    
41.     name = theName;
    
42. }
    
43. 
    
44. void Lovers::kiss(Lovers *lover)
    
45. {
    
46.     std::cout << name << "亲亲我们家的" << lover->name << std::endl;
    
47. }
    
48. 
    
49. void Lovers::ask(Lovers *lover, std::string something)
    
50. {
    
51.     std::cout << "宝贝儿" << lover->name << "帮我" << something << std::endl;
    
52. }
    
53. 
    
54. Boyfriend::Boyfriend(std::string theName)
    
55. {
    
56. }
    
57. 
    
58. Girlfriend::Girlfriend(std::string theName)
    
59. {
    
60. }
    
61. 
    
62. Others::Others(std::string theName)
    
63. {
    
64.     name = theName;
    
65. }
    
66. 
    
67. void Others::kiss(Lovers *lover)
    
68. {
    
69.     std::cout << name << "亲一下" << lover->name << std::endl;
    
70. }
    
71. 
    
72. int main()
    
73. {
    
74.     Boyfriend boyfriend("A君");
    
75.     Girlfriend girlfriend("B妞");
    
76. 
    
77.     Others others("路人甲");
    
78. 
    
79.     girlfriend.kiss(&boyfriend);
    
80.     girlfriend.ask(&boyfriend, "洗衣服啦~");
    
81. 
    
82.     std::cout << "\n当当当当! 传说中的路人甲登场......\n";
    
83.     others.kiss(&girlfriend);
    
84. 
    
85.     return 0;
    
86. }
    

复制代码

Krant5

你的两个构造器有问题，boyfriend 类构造器后面应该跟 ：Lovers(theName),同理Grilfriend类构造器后面也一样，子类构造器也要初始化父类

569529989

Krant5 发表于 2016-7-14 23:37
你的两个构造器有问题，boyfriend 类构造器后面应该跟 ：Lovers(theName),同理Grilfriend类构造器后面也一 ...

soo~~ ga~~万分感谢！
的确Boyfriend和Girlfriend的构造器都是继承自Lovers，忘了这个语法，哈哈