不建立临时变量 交换两个数字

//异或法#include<stdio.h>int main(){int a,b;scanf("%d,%d",&a,&b);a=a^b;b=a^b;a=a^b;printf("%d,%d\n",a,b);return 0;}#include<stdio.h>//加减法int main(){int a,b;scanf("%d,%d",&a,&b);a=a+b;b=a-b;a=a-b;printf("%d,%d\n",a,b);return 0;}