Design a program to accept a positive integer from the keyboard and output the equivalent roman numerals.
My answer is based on my Roman Number Converter/Deconverter.
PHP:
<?
// roman numbers and normal numbers
$natural_roman = array(1000 => 'M', 500 => 'D', 100 => 'C', 50 => 'L', 10 => 'X', 5 => 'V', 1 => 'I');
// generate a random number
$random = mt_rand(1, 1000);
// show the number
echo $random;
// loop through each possible roman numeral
while (list($key, $value) = each($natural_roman))
{
// loop while that amount can be taken away from the total
while ($random >= $key)
{
// take away from the total
$random -= $key;
// add this roman symbol to the string
$rn .= $value;
}
}
// shorten symbols
$roman_symbols = str_replace(
array('DCCCC', 'CCCC', 'LXXXX', 'XXXX', 'VIIII', 'IIII'),
array('CM', 'CD', 'XC', 'XL', 'IX', 'IV'),
$rn
);
// show the roman equivilant
echo ' is ' . $roman_symbols . ' in roman symbols';
?>Which produces:
790 is DCCXC in roman symbols