#include <stdio.h>


void cal(int x, int y, int *add, int *sub);

int main (void) {
	int n1,n2,a,b;
	cal(n1,n2,&a,&b);
	printf("a+b=%d,a-b=%d\n",a,b);
	return 0;
}
	
void cal(int x, int y, int *add, int *sub){
	*add=x+y;
	*sub=x-y;
}