不申请额外内存空间就可以完成数据互换的算法:int x=a,y=b;设计一个算法，不申请第三个变量，试把a b互换位置

//不申请额外内存空间就可以完成数据互换的算法:int x=a,y=b;设计一个算法，不申请第三个变量，试把a b互换位置
#include <iostream>
using std::cin;
using std::cout;
using std::endl;
int main()
{
	int x,y;
	cout << "Enter two numbers: X Y" << endl;
	cin >> x >> y;
	cout << "X = " << x << endl << "Y = " << y << endl;
	x = x+y;
	y = x-y;
	x = x-y;
	cout << "Through the exchange:" << endl << "X = " << x << endl << "Y = " << y << endl;
	return 0;
}