3.5

cat.rb

str = "hello"
str.is_a?(Object)
str.class

class String
  def star
    self + " *"
  end
end

str.star
"yay".star

class String
  def self.announce
    puts "I am the String class"
  end
end

String.announce

#{}"hello".announce

puts '#######'

class Pet
  attr_reader :color, :breed
  attr_accessor :name

  def initialize(color, breed, hungry)
    @color = color
    @breed = breed
    @hungry = true
  end

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

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

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

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

Kitty = Cat.new('grey', 'what?','')

puts "Let's inspect our new cat:"
puts Kitty.inspect
puts "What class our new cat beling to?"
puts Kitty.class
puts "It's our new cat an object?"
puts Kitty.is_a?(Object)
puts "What color it's our cat?"
puts Kitty.color
puts "Let's give our new cat a name"
Kitty.name = "Fufu"
puts Kitty.name


puts "Is our cat hungry now?"
Kitty.hungry?
puts "Let's feed our cat"
Kitty.feed("Wiskas")
puts "It is our cat hungry now?"
Kitty.hungry?
puts "Our cat can make noise"
puts Kitty.speak

uika = Dog.new("grey", "Weimaraner", true)
uika.speak
puts uika.breed