这才是真正的题解！！！

#include<iostream>
using namespace std;
int main()
{
    int a=20,b=22,t;
    t=a;
    a=b;
    b=t;
cout<<"a="<<a<<endl;
cout<<"b="<<b;	
return 0;
}

#include<stdio.h> int main() { int a=20, b=22; int t;

t=a;
a=b;
b=t;

printf("a=%d\nb=%d",a,b);

return 0;

}

guyffrffyg