Numbers To Roman

This algorithm converts decimal numbers to roman numerals.

• C#
• VB.Net
• C
• C++
• PHP

									function NumbersToRoman($num)
{
	$roman = "";

	$totalM = floor($num / 1000);
	$num %= 1000;
	$totalCM = floor($num / 900);
	$num %= 900;

	$totalD = floor($num / 500);
	$num %= 500;
	$totalCD = floor($num / 400);
	$num %= 400;

	$totalC = floor($num / 100);
	$num %= 100;
	$totalXC = floor($num / 90);
	$num %= 90;

	$totalL = floor($num / 50);
	$num %= 50;
	$totalXL = floor($num / 40);
	$num %= 40;

	$totalX = floor($num / 10);
	$num %= 10;
	$totalIX = floor($num / 9);
	$num %= 9;

	$totalV = floor($num / 5);
	$num %= 5;
	$totalIV = floor($num / 4);
	$num %= 4;

	$roman .= RepeatString("M", $totalM);
	$roman .= RepeatString("CM", $totalCM);
	$roman .= RepeatString("D", $totalD);
	$roman .= RepeatString("CD", $totalCD);
	$roman .= RepeatString("C", $totalC);
	$roman .= RepeatString("XC", $totalXC);
	$roman .= RepeatString("L", $totalL);
	$roman .= RepeatString("XL", $totalXL);
	$roman .= RepeatString("X", $totalX);
	$roman .= RepeatString("IX", $totalIX);
	$roman .= RepeatString("V", $totalV);
	$roman .= RepeatString("IV", $totalIV);
	$roman .= RepeatString("I", $num);

	return $roman;
}

function RepeatString($s, $count)
{
	if ($count < 0) return "";

	$str = "";

	for ($i = 0; $i < $count; $i++)
	{
		$str .= $s;
	}

	return $str;
}
								

Example

									$data = 419;
$value = NumbersToRoman($data);
								

Output

									CDXIX