Roman Numerals conversion - day 15 morning todo.

roman_numerals

class Fixnum
  def set_digits
    number_array = self.to_s.chars
    #result = ""
    digit = []
    4.times do |i|
      digit[i+1] = number_array.pop.to_i
    end
    digit
  end

  def to_roman
    result = ""
    digit = set_digits
    
    if digit[4]
      result += "M" * (digit[4])
    end
    
    if digit[3]
      if digit[3] == 9
        result +="CM"
        digit[3] -= 9
      end
      if digit[3] == 4
        result +="CD"
        digit[3] -= 4
      end
      if digit[3] >= 5
        result += "D"
        digit[3] -= 5
      end
      result += "C" * (digit[3])
    end    
    if digit[2]
      if digit[2] == 9
        result +="XC"
        digit[2] -= 9
      end
      if digit[2] == 4
        result +="XL"
        digit[2] -= 4
      end
      if digit[2] >= 5
        result += "L"
        digit[2] -= 5
      end
      result += "X" * (digit[2])

    end
    if digit[1]
      if digit[1] == 9
        result +="IX"
        digit[1] -= 9
      end
      if digit[1] == 4
        result +="IV"
        digit[1] -= 4
      end
      if digit[1] >= 5
        result += "V"
        digit[1] -= 5
      end
      result += "I" * (digit[1])

    end
    result
  end
end