2855 - 两变量交换数据

5 7

7 5

C++解答

#include <iostream>
#include <cstdio>
using namespace std;
int main()
{
    int a,b,temp;
    cin>>a>>b;
    temp=a;
    a=b;
    b=temp;
    cout<<a<<" "<<b<<endl;
    return 0;
}