Hackers way

void main() {
  
  //Car myNormalCar = Car();
  
  //print(myNormalCar.numberOfSeat);
  
  //myNormalCar.drive();
  
  //ElectricCar myTesla = ElectricCar();
  
  //myTesla.drive();
  
  //myTesla.recharge();
  
  //LevitatingCar myMagLev = LevitatingCar();
  
  //myMagLev.drive();
  
  SelfDrivingCar myWaymo = SelfDrivingCar('1 Hacker way');
  
  myWaymo.drive();
}

class Car {
  int numberOfSeat = 4;
  
  void drive() {
    print('Wheels turn.');
  }
  
}

class ElectricCar extends Car {
  int batteryLevel = 100;
  
  void recharge() {
    batteryLevel = 100;
  }
  
}

class LevitatingCar extends Car {
  
  @override
  void drive() {
    print('glides forward');
  }
}

class SelfDrivingCar extends Car {
  
  late String destination;
  
  SelfDrivingCar(String userSetDestination) {
    destination = userSetDestination;
  }
  
  @override
  void drive() {
    super.drive();
    
    print('Sterring towards $destination');
  }
}