#include<stdio.h>
int main(void)
{
int a,b;
//Enter a and b:
scanf("%d%d",&a,&b);
printf("a=%d b=%d\n",a,b);
/Begin/
/*********End**********/
printf("a=%d b=%d\n",a,b);
return 0;
}请问如何可以将唉a,b的值对调不用第三个变量?