3.5 object oriented programming II

cat.rb

class Pet #define Pet
  attr_reader :color, :breed # attribute reader method 
  attr_accessor :name 
  
  def initialize(color, breed)
  	@color = color
  	@breed = breed
  	@hungry = true
  end #end initialize method

  def feed(food)
    puts "Mmmm, " + food + "!" 
    @hungry = false
  end # end food

  def hungry? 
    if @hungry 
      puts "I'm hungry!"
    else
      puts "I'm full!"
    end
    @hungry
  end 
end

class Cat < Pet
  def speak #define speak
    puts "Meow!"
  end #end speak
end #end class Cat

class Dog < Pet
  def speak 
  	puts "Woof!"
  end 
end 

kitty = Cat.new("grey", "Persian")
puts "Let's inspect our new cat:"
puts kitty.inspect 
puts "What class does our new cat belong to?"
puts kitty.class 
puts "Is our new cat an object?"
puts kitty.is_a?(Object) 

puts "What color is our cat?"
puts kitty.color
puts "Let's give our new cat a name"
kitty.name = "Betsy"
puts kitty.name

puts "Is our cat hungry now?"
kitty.hungry?
puts "Let's feed our cat"
kitty.feed("tuna")
puts "Is our cat hungry now?"
kitty.hungry?

puts "Our cat can make noise"
kitty.speak

puppy = Dog.new("black", "Staffordshire Terrier")
puppy.speak
puts puppy.breed