#include <stdio.h>
 
void cal(int x, int y, int *sum, int *diff, int *mul, int *mod);
 
int main(void) {
 
	int x=1;
	int y=2;
	int sum=0;
	int diff=0;
	int mul=0;
	int mod=0;
 
	int *p1=&sum;
	int *p2=&diff;
	int *p3=&mul;
	int *p4=&mod;
 
	cal(x,y,p1,p2,p3,p4);
 
	printf("sum = %d\n diff = %d\n mul = %d\n mod = %d\n",sum,diff,mul,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;
 
}
 

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