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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 inspect
self.to_s
end
def <=>(other)
self.duration <=> other.duration
end
end
class CD
def to_s
puts "new to_s"
end
end
d = CD.new("A", "B", 6)
d.to_s
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