demo_reference_4.cpp

对于一个初涉VC＋＋的人来书

//**********************************
//**        reference_4.cpp       **
//**********************************

# include <iostream.h>

void swap(int& x,int& y);

void main()
{
	int x=5;
	int y=6;

	cout<<"before swap, x: "<<x<<" , y: "<<y<<endl;

	swap(x,y);

	cout<<"after swap, x: "<<x<<" , y: "<<y<<endl;
}

void swap(int& rx,int& ry)
{
	int temp;
	temp=rx;
	rx=ry;
	ry=temp;
}