Solution to Simple Matter of Inheritance

gistfile1.rb

class Animal
  attr_accessor :awake_at
  def initialize
    @awake_at = "day"
  end
  def winged?
    false
  end
  # def get_tooth_replacement_count
  #   if has_teeth?
  #     @tooth_replacement > 1
  #   end
  # end
end

class Mammal < Animal
  def initialize
    @skeletal_structure = "vertebrae"
  end
  def has_fur?
    true
  end
  def warm_blooded?
    true
  end
  def has_teeth?
    true
  end
  def tooth_replacement?
    @tooth_replacement < 2
  end
end

class Bat < Mammal
  def initialize
    @awake_at = 'night'
  end
  def winged?
    true
  end
  def has_teeth?
     true
  end
end

class Primate < Mammal
  attr_accessor :num_legs
  def initialize
    @num_legs = 2
  end
end

class Chimpanzee < Primate
  def locomotion
    "Knuckle walking"
  end
end

class Amphibian < Animal
  def has_teeth?
     false
  end
  def warm_blooded?
    false
  end
end

class Frog < Amphibian
  def locomotion
    "Jumps"
  end
  def food
    "Flies"
  end
end

drew = Chimpanzee.new
puts drew.num_legs
puts drew.locomotion

janet = Amphibian.new
puts janet.has_teeth?
puts janet.warm_blooded?

taz = Frog.new
puts taz.has_teeth?
puts taz.locomotion
puts taz.food

batman = Bat.new
puts batman.awake_at
puts batman.has_teeth?
puts batman.winged?