11 lines
467 B
Ruby
11 lines
467 B
Ruby
Symbols = { 1=>'I', 5=>'V', 10=>'X', 50=>'L', 100=>'C', 500=>'D', 1000=>'M' }
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Subtractors = [ [1000, 100], [500, 100], [100, 10], [50, 10], [10, 1], [5, 1], [1, 0] ]
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def roman(num)
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return Symbols[num] if Symbols.has_key?(num)
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Subtractors.each do |cutPoint, subtractor|
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return roman(cutPoint) + roman(num - cutPoint) if num > cutPoint
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return roman(subtractor) + roman(num + subtractor) if num >= cutPoint - subtractor and num < cutPoint
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end
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end
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