Lektion3_3

class Vehicle
{
public:
  Vehicle(int number_of_wheels = 0, int max_speed = 0)
    : number_of_wheels{number_of_wheels}, max_speed{max_speed}
    {
      if (number_of_wheels > 6)
      {
        max_speed{100};
      }
    }

  int get_number_of_wheels() const;
  int get_max_speed() const;

  Location& get_start_point() const;
  Location& get_destination() const;

  virtual std::string describe_vehicle() = 0;

protected:
  int number_of_wheels;
  int max_speed;
  Location start_point; //made-up class Location
  Location destination; //made-up class Location
};

class Passenger_Vehicle: public Vehicle
{
public:
  Passenger_Vehicle(int wheels = 0, int speed = 0,
                    int passengers = 0, int doors = 0)
   : Vehicle{wheels, speed},
     numbers_of_passengers{passengers}, number_of_doors{doors}
   {
   }

  int get_number_of_passengers() const;
  int get_number_of_doors() const;

  std::string describe_vehicle() override
  {
    std::string out{};
    out = out + "Number of wheels: " + std::to_string(number_of_wheels) + "\n";
    out = out + "Top speed: " + std::to_string(max_speed) + "\n";
    out = out + "Number of passengers: " + std::to_string(number_of_passengers);
    out += "\n";
    out = out + "Number of doors: " + std::to_string(number_of_doors) + "\n";

    return out;
  }

private:
  int number_of_passengers;
  int number_of_doors;
};


class Freight_Vehicle: public Vehicle
{
public:
  Freight_Vehicle(int wheels = 0, int speed = 0,
                  int payload = 0)
    : Vehicle{wheels, speed}, max_payload{payload}
    {
    }

  int get_max_payload() const;
  void load_freight_vehicle();
  Load& unload_freight_vehicle(); //made-up class Load

  std::string describe_vehicle() override
  {
    std::string out{};
    out = out + "Number of wheels: " std::to_string(number_of_wheels) + "\n";
    out = out + "Top speed: " std::to_string(max_speed) + "\n";
    out = out + "Max payload: " std::to_string(max_payload) + "\n";

    return out;
  }

private:
  int max_payload;
};