JLaky's Open Mind

class Vehicle
# All sorts of vehicle-related code...
   def start_engine
   # Start the engine
   end
   def stop_engine
   # Stop the engine
   end
end

class Car < Vehicle
  def sunday_drive
     start_engine
     # Cruise out into the country and return
     stop_engine
  end
end

 

class Engine
  # All sorts of engine-related code...
  def start
  # Start the engine
  end
  def stop
  # Stop the engine
  end
end

 

class Car
  def initialize
  @engine = Engine.new
  end
  def sunday_drive
    @engine.start
    # Cruise out into the country and return...
    @engine.stop
  end
end

class Car

  # same as above

  def start_engine
    @engine.start
  end

 
  def stop_engine
    @engine.stop
  end

end