Add new constructor : inheritance « Class « Ruby

1. Ruby
2. Class
3. inheritance

Add new constructor

class CD
  include Comparable
  @@plays = 0
  attr_reader :name, :artist, :duration
  attr_writer :duration
  def initialize(name, artist, duration)
    @name     = name
    @artist   = artist
    @duration = duration
    @plays    = 0
  end
  def to_s
    "CD: #@name--#@artist (#@duration)"
  end
end

class NewCD < CD
  def initialize(name, artist, duration, lyrics)
    super(name, artist, duration)
    @lyrics = lyrics
  end
  def to_s
    super + " [#@lyrics]"
  end
end

 

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