카타 8급 Compare within margin

C

int close_compare(int a, int b, int margin) {
  if( abs(a-b)<=margin ) return 0;
  return a>b ? 1 : -1;
}

int close_compare(int a, int b, int margin) {
  int c = a-b;
  if( abs(c)<=margin ) return 0;
  return c>0 ? 1 : -1;
}

int close_compare(int a, int b, int margin) {
  if (a < b) return (a < b - margin) ? -1 : 0;
  if (a > b) return (a > b + margin) ? 1 : 0;
  return 0;
}