P5: OO Inheritance.rb

class Vehicle
   attr_reader :color, :wheels 

   def initialize(vehicle_attributes_hash)
      @status = vehicle_attributes_hash[:status]
      @wheels = vehicle_attributes_hash[:wheels]
   end

   def drive
      @status = :driving
   end

   def brake
      @status = :stopped
   end

   def needs_gas?(arr_of_liklihood)
      arr_of_liklihood.sample
   end
end

class Car < Vehicle
    @@WHEELS = 4

    def initialize(vehicle_attributes_hash)
      vehicle_attributes_hash[:wheels] = 4
      @color = args[:color]
      @wheels = @@WHEELS
    end

    def needs_gas?
      super([true,true,false])
    end
end

class Bus < Vehicle
    attr_reader :passengers

    def initialize(vehicle_attributes_hash)
      super(vehicle_attributes_hash)
      @num_seats = args[:num_seats]
      @fare = args[:fare]
      @passengers=[]
    end

    def drive
      return self.brake if stop_requested?
      super
    end

    def admit_passenger(passenger,money)
      @passengers << passenger if money > @fare
    end

    def stop_requested?
      return [true,false]
    end

    def needs_gas?
      super([true,true,true,false])
    end
end


class Motorbike < Vehicle
    @@WHEELS = 2

    def initialize(vehicle_attributes_hash)
      super(vehicle_attributes_hash)
      @wheels = @@WHEELS
    end

    def drive
      @speed = :fast
      super
    end

    def needs_gas?
      super([true,false,false,false])
    end 

    def weave_through_traffic
      @status = :driving_like_a_crazy_person
    end
end

vehicle_features = {:color => "blue", :wheels => 4, :num_seats =>4, :fare => 0, :speed=>"fast"}

car = Car.new(vehicle_features)
puts car.drive == :driving
puts car.brake == :stopped
puts car.needs_gas? == true || car.needs_gas? == false

puts 

bus = Bus.new(vehicle_features)
puts bus.drive == :driving
puts bus.brake == :stopped
puts (bus.needs_gas? == true || bus.needs_gas? == false)
puts (bus.stop_requested? == true || bus.stop_requested? == false)
puts bus.admit_passenger("Joe", 56)

puts

bike = Motorbike.new(vehicle_features)
puts bike.drive == :driving
puts bike.brake == :stopped
puts (bike.needs_gas? == true || bike.needs_gas? == false)
puts (bike.weave_through_traffic == :driving_like_a_crazy_person)