47.cpp

经典C语言程序设计100例1-10 如【程序1】 题目：有1、2、3、4个数字

/*---------------------------------------例题47--------------------------------------------------------*/

#include <iostream>

using namespace std;

#define swap(x, y)\
{\
	int t = x;\
	x = y;\
	y = t;\
}\

int main()
{
	int a = 1, b = 2;
	swap(a, b);
	cout<<"a = "<<a<<endl;
	cout<<"b = "<<b<<endl;
	return 0;
}