不创建临时变量，交换俩个数的内容

<pre name="code" class="cpp"><span style="font-size:18px;">    加减实现俩个数的交换#include<stdio.h>int main(){       int a,b;       printf("请输入俩个数字：\n");       scanf("%d,%d",&a,&b);       printf("\n");       a=a+b;       b=a-b;       a=a-b;       printf("%d,%d\n",a,b);       return 0;}   乘除实现俩个数的交换#include<stdio.h>int main(){int a=5;int b=6;a=a*b;b=a/b;a=a/b;printf("a=%d,b=%d\n",a,b);return 0;}   异或实现俩个数的交换#include<stdio.h>int main(){int a=10;int b=11;a=a^b;b=a^b;a=a^b;printf("a=%d,b=%d\n",a,b);return 0;}</span>