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
def name
@name
end
def artist
@artist
end
def duration
@duration
end
end
d = CD.new("B", "F", 260)
d.artist
d.name
d.duration