classic-inheritance.rb

#Classical inheritance exercise

module Flight
	attr_accessor :airspeed_velocity
	def fly(airspeed_velocity)
		return "I'm a #{self.class.to_s.downcase}, I'm flying!"
	end
end


class Animal
	attr_accessor :name, :blood_type
	
	@@num_animals = 0
	def initialize(name, blood_type)
		@@num_animals += 1
		@name = name
		@blood_type = blood_type
	end

	def self.num_animals
		@@num_animals
	end
end

class Mammal < Animal
	attr_accessor :num_legs
	def initialize(name, num_legs)
		super(name, "warm")
		@num_legs = num_legs
	end
end

class Amphibian < Animal
	attr_accessor :terrestrial
	def initialize(name, terrestrial)
		super(name, "cold")
		@terrestrial = terrestrial
	end
end

class Primate < Mammal
	attr_accessor :family
	def initialize(name, family)
		super(name, 2)
		@family = family
	end
end

class Frog < Amphibian
	attr_accessor :poisonous
	def initialize(name, poisonous)
		super(name, "aquatic")
		@poisonous = poisonous
	end
end

class Bat < Mammal
	include Flight
	attr_accessor :species
	def initialize(name, species, airspeed_velocity)
		super(name, 2)
		@species = species
		puts fly(airspeed_velocity)
	end
end

class Parrot < Animal
	include Flight
	attr_accessor :species
	def initialize(name, species, airspeed_velocity)
		super(name, "warm")
		@species = species
		puts fly(airspeed_velocity)
	end
end

class Chimpanzee < Primate
	attr_accessor :trained
	def initialize(name, trained)
		super(name, "hominidae")
		@trained = trained
	end
end

animal = Animal.new("Jimmy", "warm")
mammal = Mammal.new("Jimmy", 4)
primate = Primate.new("Jimmy", "hominidae")
chimpanzee = Chimpanzee.new("Jimmy", false)
amphibian = Amphibian.new("Jonny", "terrestrial")
frog = Frog.new("Jonny", false)
bat = Bat.new("Vlad", "Vampire Bat", 100)
parrot = Parrot.new("Cocky", "Cockatoo", 100)
puts animal.inspect
puts mammal.inspect
puts primate.inspect
puts chimpanzee.inspect
puts frog.inspect
puts amphibian.inspect
puts bat.inspect
puts parrot.inspect

puts Animal.num_animals