编辑代码

#include <stdio.h>
int main () {
   int a,b;
   printf("请输入两个正整数:");
   scanf("%d%d",&a,&b);
   printf("sum%d\n",a+b);
   printf("sub=%d\n",a-b);
   printf("mult=%d\n",a*b);
   printf("div=%d\n",a/b);
   printf("mod=%d\n",a%b);
}