Euclidean algorithm in c

euclidean_algorithm.c

#include <stdio.h>

int gcd(int a, int b) {
  int r;
  for (;;) {
    r = a % b;
    if (!r)
      break;
    a = b;
    b = r;
  }
  return b;
}

int main() {
  int a = 5796;
  int b = 7935;
  int r = gcd(a, b);
  printf("%d\n", r); 

  return 0;
}