int main()
{
  int n;
  cout << "Enter a number less than 10: ";
  cin >> n;

  if (n >= 10)
  {
    cout << "Enter a number less than 10: ";
    cin >> n;
  }
  
  if (n >= 10)
  {
    cout << "Enter a number less than 10: ";
    cin >> n;
  }

  return 0;
}