#include <stdio.h>
int main()
{
    int a,b=0;
    scanf("a=%d,b=%d",&a,&b);
    a = a^b;
    b = a^b;
    a = a^b;
    printf("a=%d,b=%d",a,b);
    return 0;
}

记住灵活运用 ^ 操作符！