C语言不创建临时变量，交换两个整型的值

#include "stdio.h"

int main()
{
int a = 0;
int b = 0;
scanf("%d%d",&a,&b);
a = a^b;
b = a^b;
a = a^b;
printf("a=%d b=%d\n",a,b);
system("pause");
return 0;
}

#include "stdio.h"

int main()
{
int a = 0;
int b = 0;
scanf("%d%d",&a,&b);
a = a+b;
b = a-b;
a = a-b;
printf("a=%d b=%d\n",a,b);
system("pause");
return 0;
}