#include <iostream> using namespace std; int main () { int a = 3; int b = 5; cout<<"a="<<a<<",b="<<b<<endl; a = a+b; ///a=7 b = a-b; ///b=3; a = a-b; ///a=5 cout<<"a="<<a<<",b="<<b<<endl; return 0; }
输出：
a=3,b=5
a=5,b=3
原文：http://www.cnblogs.com/xudong-bupt/p/3975469.html