12_5.cpp

C语言基本程序

#include <iostream.h>
void main()
{
	int x = 3;
	int &y = x;
	cout <<"变量值是"<<x<<endl;
	cout <<"引用值是"<<y<<endl;
	x = 4;
	cout <<"修改变量值之后"<<endl;
	cout <<"变量值是"<<x<<endl;
	cout <<"引用值是"<<y<<endl;
	y = 5;
	cout <<"修改引用值之后"<<endl;
	cout <<"变量值是"<<x<<endl;
	cout <<"引用值是"<<y<<endl;
}