/*
   Illustrates value parameters and reference parameters
*/

#include <stdio.h>
#include <math.h>

int product(int, int, int*, int *); /* function prototype */

void main(void)
{
  int inp1, inp2, total, mult, diff;

  printf("Enter an integer value for inp1: ");
  scanf("%d", &inp1);
  printf("Enter an integer value for inp2: ");
  scanf("%d", &inp2);

  mult = product(inp1, inp2, &total, & diff);
  printf("Given inp1 value is %d \n", inp1);
  printf("Given inp2 value is %d \n", inp2);
  printf(" Their sum is %d \n", total);
  printf(" Their difference is %d \n", diff);
  printf(" Their product is %d \n", mult);
}

int product(int num1, int num2, int *sum, int* difference)
{   /* function definition */
   * sum = num1 + num2;
   *difference = abs(num1 - num2);
   return(num1 * num2);
}