標(biāo)題: C++語言靜態(tài)數(shù)據(jù)成員與靜態(tài)成員函數(shù) [打印本頁]

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作者: daming    時間: 2014-12-30 02:00
標(biāo)題: C++語言靜態(tài)數(shù)據(jù)成員與靜態(tài)成員函數(shù)
本帖最后由 daming 于 2014-12-30 02:15 編輯

1. 
   
2. 
   
3. #include<iostream>
   
4. using namespace std;
   
5. class Cat
   
6. {
   
7. private:
   
8. static int HowManyCats;
   
9. public:
   
10. Cat();
    
11. ~Cat();
    
12. static int GetHowMany();
    
13. };
    
14. 
    
15. int Cat::HowManyCats=0;
    
16. 
    
17. Cat::Cat()
    
18. {
    
19. HowManyCats++;
    
20. }
    
21. 
    
22. Cat::~Cat()
    
23. {
    
24. HowManyCats--;
    
25. }
    
26. 
    
27. int Cat::GetHowMany()
    
28. {
    
29. return HowManyCats;
    
30. }
    
31. 
    
32. void main()
    
33. {
    
34. Cat a1,a2,a3;
    
35. cout<<Cat::GetHowMany()<<endl;
    
36. {
    
37.   Cat a4,a5,a6;
    
38.   cout<<a4.GetHowMany()<<endl;
    
39. }
    
40. cout<<a1.GetHowMany()<<endl;
    
41. }
    

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