HCF and LCM

//Calculation of HCF and LCM

#include <stdio.h>

#include <conio.h>

long HCF(long, long);//Function Declaration the 2 parameters

void main()

{

  long x, y, H, L;

  clrscr();

  printf("Enter two integers\n");

  scanf("%ld%ld", &x, &y);

  H = HCF(x, y);

  L = (x*y)/H;

  printf("HCF of %ld and %ld = %ld\n", x, y, H);

  printf("LCM of %ld and %ld = %ld\n", x, y, L);

  getch();

}

//Body of the function HCF

long HCF(long a, long b)

{

  if (b == 0)

  {

    return a;

  }

  else

  {

    return HCF(b, a % b);

  }

}