题解 | #按照格式输入并交换输出#

#include<stdio.h>
int main(){
    int a,b;
    scanf("a=%d,b=%d",&a,&b);//如果a=2,b=1
    a=a+b;                   //a=a+b=3
    b=a-b;                   //b=a-b=3-1=2
    a=a-b;                   //a=a-b=3-2=1
    printf("a=%d,b=%d",a,b);
    return 0;
}