Post_16.1.rb

class RomanNumerals
  attr_reader :numerals_hash

  def initialize
    @numerals_hash = {1 => "I", 4 => "IV", 5 => "V", 9 => "IX",
		      10 => "X", 50 => "L", 100 => "C",
		      500 => "D", 1000 => "M"}
  end

  def convert(number)

    @numerals_hash.each do |arabic, roman|
      if arabic == number
        return roman
      elsif number >= 10
        difference = number - 10
        if arabic == difference
	  equivalent += "X"
	  equivalent += roman
	  return equivalent
	end
      elsif number >= 10
        equivalent = "X" + ("I" * difference)
      elsif number >= 5
        difference = number - 5
	equiv = "V" + ("I" * difference)
	return equiv
      elsif number <= 3
	equiv = "I" * number	
	return equiv
      end
     end
   end	
end