Demonstration of Inheritance and Polymorphism in Ruby

animals.rb

class Animal
  def initialize(name)
    @name = name
  end
  def speak()
    "#{@name} says #{sound()}"
  end
end

class Cow < Animal
  def sound()
    "moo"
  end
end

class Horse < Animal
  def sound()
    "neigh"
  end
end

class Sheep < Animal
  def sound()
    "baaaaa"
  end
end

if __FILE__ == $0
  s = Horse.new "CJ"
  puts(s.speak())
  c = Cow.new("Bessie")
  puts(c.speak())
  puts(Sheep.new("Little Lamb").speak())
end