birds.rb

class Bird
  attr_accessor :age
  def initialize(age)
    @age = age
  end
  def how_old
    puts @age
  end
end

class Eagle < Bird
  attr_accessor :length
  def initialize(length,age)
    @length = length 
    super(age)
  end
  def how_long
    puts @length
  end
end

class Haast_Eagle < Eagle
  def fact
    puts "Giant eagle rumoured to eat people, extinct"
  end
end


my_bird = Bird.new(14)
my_bird.how_old

my_eagle = Eagle.new(10,4)
my_eagle.how_long
my_eagle.how_old

my_haast_eagle = Haast_Eagle.new(9000,8000)
my_haast_eagle.fact
my_haast_eagle.how_old
my_haast_eagle.how_long