HCF AND LCM

HCF and LCM

#include < stdio.h >

long gcd(long, long);
int main() {
  long x, y, hcf, lcm;

  printf("Enter two integers\n");
  scanf("%ld%ld", &x, &y);

  hcf = gcd(x, y);
  lcm = (x*y)/hcf;

  printf("Greatest common divisor of %ld and %ld = %ld\n", x, y, hcf);
  printf("Least common multiple of %ld and %ld = %ld\n", x, y, lcm);

  return 0;
}

/*if 1st no is 0 then 2nd no is gcd
make 2nd no 0 by subtracting smallest from largest and return 1st no as gcd*/
long gcd(long x, long y) {
  if (x == 0) {
  return y;
  }

  while (y != 0) {
  if (x > y) {
    x = x - y;
  }
  else {
    y = y - x;
  }
}

return x;
}