Aer Interpreter Source
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class Program {
private string num2Roman(int $num) {
int $n = $num;
string $result = '';
int[] $lookup = {'M' => 1000, 'CM' => 900, 'D' => 500, 'CD' => 400,
'C' => 100, 'XC' => 90, 'L' => 50, 'XL' => 40,
'X' => 10, 'IX' => 9, 'V' => 5, 'IV' => 4, 'I' => 1};
int $matches;
foreach(string $roman => int $value in $lookup) {
$matches = (int) ($n / $value);
$result += str_repeat($roman, $matches);
$n = $n % $value;
}
return $result;
}
public void main() {
print(' 7 => ' + $this->num2Roman(7) + "\n");
print(' 9 => ' + $this->num2Roman(9) + "\n");
print(' 11 => ' + $this->num2Roman(11) + "\n");
print(' 42 => ' + $this->num2Roman(42) + "\n");
print(' 105 => ' + $this->num2Roman(105) + "\n");
print('1984 => ' + $this->num2Roman(1984) + "\n");
print('1999 => ' + $this->num2Roman(1999) + "\n");
print('2018 => ' + $this->num2Roman(2018) + "\n");
print('2144 => ' + $this->num2Roman(2144) + "\n");
}
}