x7yKp2 - Online C Compiler & Debugging Tool

#include <stdio.h>

int main(void) {
int a,b,c,a1,a2,a3,a4,a5;
scanf("%d %d %d",&a,&b,&c);
switch(c)
{
case 1:a1=a+b;
 printf("%d+%d=%d",a,b,a1);
break;
case 2:a2=a-b;
printf("%d-%d=%d",a,b,a2);
break;
case 3:a3=a*b;
printf("%d×%d=%d",a,b,a3);
break;
case 4:a4=a/b;
a5=a%b;
if(a5==0)
printf("%d÷%d=%d",a,b,a4);
else
printf("%d÷%d=%d余り%d",a,b,a4,a5);
break;
}
	return 0;
}