counter

gistfile1.rb

module Drive
  def speed_up( num )
    self.speed += num
    puts "you accelerate by #{num} and are now travelling at #{speed} mph."
  end

  def slow_down( num ) 
    self.speed -= num
    puts "You decrease your speed by #{num} and are now travelling at #{speed}"
  end

  def stop
    puts "stop and park"
  end
end

class Vehicle
  @@num_of_vehicles = 0
  def initialize
    @@num_of_vehicles += 1
  end
  def self.mpg( miles, gallon ) 
    puts "Your car gets #{miles / gallon}"
  end
  def self.info
    @@num_of_vehicles
  end
end

class MyCar < Vehicle
  attr_accessor :year, :colour, :model, :speed

  VEHICLE_TYPE = "car"
  @@num_of_cars = 0

  def initialize(y,c,m)
    @year = y
    @colour = c
    @model = m
    @speed = 0
    @@num_of_cars += 1
  end


  def self.total_num_of_cars
    @@num_of_cars
  end

  def change_car( y,c,m )
    self.year = y
    self.colour = c
    self.model = m
  end

  def my_car_info
    puts "You drive a #{colour} #{year} #{model}. The vehicle type is #{VEHICLE_TYPE}"
  end

  def to_s
    puts "#{model} cars rock!"
  end

  include Drive

end

class MyTruck < Vehicle

  VEHICLE_TYPE = "truck"
  def info
    puts "Your vehicle type is #{VEHICLE_TYPE}"
  end
end

class MyBoat < Vehicle
end

ford = MyCar.new( "2000", "black", "Ford Modeo" )
vic = MyCar.new( "2000", "red", "Vauxhall Corsa" )
puts MyCar.total_num_of_cars


lorry1 = MyTruck.new
lorry2 = MyTruck.new
car1 = MyCar.new("2001", "black", "VW Polo GTI")
boat1 = MyBoat.new


puts Vehicle.info
puts MyCar.total_num_of_cars