Roman numbers with ruby

roman.rb

class Roman                                                                     

»···def self.method_missing name, *args
»···»···roman = name.to_s
»···»···roman.gsub!("IV", "IIII")
»···»···roman.gsub!("IX", "VIIII")
»···»···roman.gsub!("XL", "XXXX")
»···»···roman.gsub!("XC", "LXXXX")
»···»···roman.gsub!("CD", "CCCC")
»···»···roman.gsub!("CM", "DCCCC")

»···»···(roman.count("I")+
»···»··· roman.count("V")*5 +
»···»··· roman.count("X")*10 +
»···»··· roman.count("L")*50 +
»···»··· roman.count("C")*100) +
»···»··· roman.count("D")*500 +
»···»··· roman.count("M")*1000
»···end
end

puts Roman.X
puts Roman.XC
puts Roman.XXII
puts Roman.MCMXCIX