uni_2e.rb

class Animal
  def speak
    puts "?"
  end
end

class Cat < Animal
  def speak
    puts "miau"
  end
end

class Dog < Animal
  def speak
    puts "wuff"
  end
end


ant = Animal.new
ant.speak

wuffi = Dog.new
wuffi.speak

mietzi = Cat.new
mietzi.speak