静态类成员

测试代码：

#include<iostream>

using namespace std;

 

class myclass{

       int little;

public:

       static int num;

       myclass(){num++;}

       ~myclass(){num--;}

       static void init(int i){num=i;}

};

int myclass::num;

 

void fun()

{

       myclass temp;

       printf("In function num is %d/n",temp.num);

}

 

int main()

{

       myclass::init(10);

       myclass a,b;

       printf("in a nume is %d ; in b num is %d/n",a.num,b.num);

       printf("now num in a is %d ; num in b is %d/n",a.num,b.num);

       fun();

       printf("now num in a is %d ; num in b is %d/n",a.num,b.num);

       return 0;

}

 

测试结果：

in a nume is 12 ; in b num is 12

now num in a is 12 ; num in b is 12

In function num is 13

now num in a is 12 ; num in b is 12

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