string String.ThreeDigitWords(int num)
{
	amount_in_words = "";
	if(num > 99)
	{
		single_words = {"One","Two","Three","Four","Five","Six","Seven","Eight","Nine"};
		first_digit_str = num.toString().substring(0,1);
		first_digit = first_digit_str.toLong();
		amount_in_words = amount_in_words + single_words.get(first_digit - 1) + " hundred";
		second_digit_str = num.toString().substring(1);
		second_digit = second_digit_str.toLong();
		if(second_digit > 0)
		{
			amount_in_words = amount_in_words + " and " + thisapp.String.TwoDigitWords(second_digit);
		}
	}
	return amount_in_words;
}