ex_staticdata.cpp

郑阿齐VC教材

#include <iostream.h>
class CSum
{
public:
	CSum(int a = 0, int b = 0)  
	{ 
		nSum += a+b; 
	}
	int GetSum()  
	{ 
		return nSum; 
	}
	void SetSum(int sum)	
	{ 
		nSum = sum;	
	}
private:
	static int nSum;		// 声明静态数据成员
};
int CSum::nSum = 0;		// 静态数据成员的初始化
void main()
{
	CSum one(10, 2);
	cout<<"sum = "<<one.GetSum()<<endl;
	one.SetSum(5);
	cout<<"sum = "<<one.GetSum()<<endl;
}