vehicle.rb

class Vehicle
 
   attr_reader :color, :wheels, :status, :gas
 
  def initialize(args)
    @color = args[:color]
    @speed = :normal
    @wheels = nil
    @status = :normal_speed
    @gas = :full
  end
 
  def drive
   @status = :driving
  end
  def drive
   @status = :driving
   @speed = :fast
  end
  def brake
   @status = :stopped    
  end
 
  def needs_gas?
    tank = [:empty, :half, :quarter, :empty, :half, :quarter ].sample.to_s 
    @gas = tank
   return tank + " Tank"
  end
 
  def fill_tank!
   @gas = :full
  end
 
 
end
 
class Car < Vehicle
  @@WHEELS = 4
 
  def initialize(args)
   super
   @color = args[:color]
   @wheels = @@WHEELS
  end
end
 
class Bus < Vehicle
  attr_reader :passengers, :num_seats, :fare
  def initialize(args)
   super
   @color = args[:color]
   @wheels = args[:wheels]
   @num_seats = args[:num_seats]
   @fare = args[:fare]
   @passengers=[]
  end
 
  def admit_passenger(passenger,money)
   @passengers << passenger if money == @fare
  end
 
  def stop_requested?
   should_stop = [true,false].sample
   if should_stop
     self.brake
   else
     return false
   end
 end
end
 
 
class Motorbike < Vehicle
  @@WHEELS = 2
 
  def initialize(args)
   super
   @color = args[:color]
   @wheels = @@WHEELS
  end
 
  def weave_through_traffic
    @status = :driving_like_a_crazy_person
  end
end
 
# ***************************************************************************************
# Fleet Testing
 
fleet = []
p "Motorbike Fleet"
fleet << Motorbike.new(:color => "Yellow")
p fleet[0].color == "Yellow"
fleet[0].weave_through_traffic
p "This motorbike is..." + fleet[0].status.to_s
p "How much gas do you have? -- I have a #{fleet[0].needs_gas?}."
if fleet[0].gas == :empty
   fleet[0].fill_tank!
   p "Your tank is now full"
end
 
fleet << Motorbike.new(:color => "Blue")
p fleet[1].color == "Blue"
p "This motorbike is driving..." + fleet[1].status.to_s
p "This bike has #{fleet[1].wheels} wheels."
p "How much gas do you have? -- I have a #{fleet[1].needs_gas?}."
if fleet[1].gas == :empty
   fleet[1].fill_tank!
   p "Your tank is now full"
end
 
p "Bus Fleet"
fleet << Bus.new(:color => "White", :wheels => 10, :num_seats => 32, :fare => 1.50)
a = "a"
until fleet[2].passengers.size == fleet[2].num_seats
 fleet[2].admit_passenger("person " + a, 1.50)
 a = a.next
end
p "This bus is carrying #{fleet[2].passengers.size} passengers"
p "A passenger requested a stop.  What's going to happen?"
if fleet[2].stop_requested? == false
   p "A passenger did not really request a stop and was just joking.  The bus is still driving #{fleet[2].status}"
else
   p "A passenger did request a stop and the bus is now #{fleet[2].status}."
end
p "How much gas do you have? -- I have a #{fleet[2].needs_gas?}."
if fleet[2].gas == :empty
   fleet[2].fill_tank!
   p "Your tank is now full"
end
p fleet[2].color == "White"
p fleet[2].wheels == 10
p fleet[2].num_seats == 32
p fleet[2].fare == 1.50
 
 
fleet << Bus.new(:color => "Green", :wheels => 12, :num_seats => 65, :fare => 1.25)
a = "a"
until fleet[3].passengers.size == fleet[3].num_seats
 fleet[3].admit_passenger("person " + a, 1.25)
 a = a.next
end
p "This bus is carrying #{fleet[3].passengers.size} passengers"
p "A passenger requested a stop.  What's going to happen?"
if fleet[3].stop_requested? == false
   p "A passenger did not really request a stop and was just joking.  The bus is still driving #{fleet[3].status}"
else
   p "A passenger did request a stop and the bus is now #{fleet[3].status}."
end
p "How much gas do you have? -- I have a #{fleet[3].needs_gas?}."
if fleet[3].gas == :empty
   fleet[3].fill_tank!
   p "Your tank is now full"
end
p fleet[3].passengers.size == fleet[3].num_seats
p fleet[3].color == "Green"
p fleet[3].wheels == 12
p fleet[3].num_seats == 65
p fleet[3].fare == 1.25
 
 
p "Car Fleet"
fleet << Car.new(:color => "Red")
p fleet[4].color == "Red"
p "How much gas do you have? -- I have a #{fleet[4].needs_gas?}."
if fleet[4].gas == :empty
   fleet[4].fill_tank!
   p "Your tank is now full"
end
 
fleet << Car.new(:color => "Grey")
p fleet[5].color == "Grey"
p "How much gas do you have? -- I have a #{fleet[5].needs_gas?}."
if fleet[5].gas == :empty
   fleet[5].fill_tank!
   p "Your tank is now full"
end