#include <stdio.h>
void cal(int x,int y,int *sum,int *diff,int *mul,int *mod);

int main(void) {
int x,y,sum,diff,mul,mod;
printf("x= ");scanf("%d",&x);
printf("y= ");scanf("%d",&y);

cal(x,y,&sum,&diff,&mul,&mod);

printf("sum = %d\n",sum);
printf("diff = %d\n",&diff);
printf("mul = %d\n",&mul);
printf("mod = %d\n",&mod);

	return 0;
}

void cal(int x,int y,int *sum,int *diff,int *mul,int *mod)
{
*sum=x+y;
*diff=x-y;
*mul=x*y;
*mod=x/y;
}