inherit.rb

module Flight

  def fly
    puts "I'm a #{self.class.name}, I'm flying!"
  end
end

class Animal

  @name = "Animal"
  attr_reader :name

end

class Mammal < Animal

  @name = "Mammal"

  def is_warm_blooded?
    true
  end

end

class Amphibian < Animal

  @name = "Amphibian"

  def is_warm_blooded?
    false
  end

end

class Primate < Mammal

  @name = "Primate"
  @num_legs = 2

end

class Frog < Amphibian

  @name = "Frog"
  @num_legs = 4

end

class Bat < Mammal
  include Flight

  @name = "Bat"
  @num_legs = 2

end

class Bird < Animal
  include Flight

  @name = "Bird"
  @num_legs = 2

  def is_warm_blooded?
    true
  end

end

class Parrot < Bird

  @name = "Parrot"

end

class Chimpanzee < Primate

  @name = "Chimpanzee"
end

Parrot.new.fly
Bat.new.fly
puts Parrot.new.is_warm_blooded?
puts Chimpanzee.new.is_warm_blooded?
puts Frog.new.is_warm_blooded?
puts Parrot.name