本帖最后由 daming 于 2014-12-30 02:15 編輯
- #include<iostream>
- using namespace std;
- class Cat
- {
- private:
- static int HowManyCats;
- public:
- Cat();
- ~Cat();
- static int GetHowMany();
- };
- int Cat::HowManyCats=0;
- Cat::Cat()
- {
- HowManyCats++;
- }
- Cat::~Cat()
- {
- HowManyCats--;
- }
- int Cat::GetHowMany()
- {
- return HowManyCats;
- }
- void main()
- {
- Cat a1,a2,a3;
- cout<<Cat::GetHowMany()<<endl;
- {
- Cat a4,a5,a6;
- cout<<a4.GetHowMany()<<endl;
- }
- cout<<a1.GetHowMany()<<endl;
- }
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