demonstrate inheritance and polymorphism

output

C:\Users\walton.hoops\Desktop>ruby vehicle.rb
Cruisin in my Car
Cruisin in my Truck
get a long little doggie!
Tow that gosh durn Car

C:\Users\walton.hoops\Desktop>

vehicle.rb

class Vehicle
  def drive
    puts "Cruisin in my #{self.class}"
  end
end

class Car < Vehicle
end

class Truck < Vehicle
  def tow(target)
    puts "Tow that gosh durn #{target.class}"
  end
end

class Cattle
  def self.drive
    puts "get a long little doggie!"
  end
end

def drive_vehicle(v)
  v.drive
end

drive_vehicle(Car.new)
drive_vehicle(Truck.new)
drive_vehicle(Cattle)

Truck.new.tow(Car.new)