visualCplusplus学习课件大连东软培训教材

#include "stdafx.h"
#include <iostream.h>

class CStu
{
public:
	friend void Fun(CStu& s);
	int& GetX()
	{
		return x;
	}
protected:
private:
	int x;
};
void Fun(CStu& s)
{
	s.x = 10;
}
void main()
{
	CStu s;
	Fun(s);
	s.GetX() +=2;
	cout << s.GetX() <<endl;
}