Hi all,

I posted a similar question a short time ago. But I
don't think the replies help me understand the
behaviors. So I post a short version( sorry if it
bothers you again).

I have the following script. I don't call Song#to_s in
my  script but I can print all the attributes of a
song. Why is that?

Thanks,

Li

#########
class Song  
  def initialize(name,artist,duration)
    @name=name
    @artist=artist
    @duration=duration
  end 
  #attr_reader :name, :artist, :duration 
  
  def to_s
   "#@name\t#@artist\t\t#@duration"
  end
end


s=Song.new('song1','author1','20')
puts s

######output
>ruby ruby20c.rb
song1	author1		20
>Exit code: 0


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