5_7.cpp

来自「湖南大学ACM-OJ的部分题目代码」· C++ 代码 · 共 23 行

#include<iostream>
using namespace std;
class cat
{
private:
	static int HowManyCats;
public:
	cat(){HowManyCats++;}
	~cat(){HowManyCats--;}
	static int GetHowMany(){return HowManyCats;}
};

int cat::HowManyCats=0;
void main()
{
	cout<<cat::GetHowMany()<<endl;
	cat cat1;
	cout<<cat::GetHowMany()<<endl;
    cat cat2;
	cout<<cat::GetHowMany()<<endl;
}