I get an error that I can't override.

Question

Sorry that you have to review this rookie code but could someone explain to me what I am doing wrong?

objects.swift

class Vehicle {
  var numberOfDoors: Int
  var numberOfWheels: Int

  init(withDoors doors: Int, andWheels wheels: Int) {
      self.numberOfDoors = doors
      self.numberOfWheels = wheels
  }
}

// Enter your code below
class Car: Vehicle {
  let numberOfSeats: Int = 4
    override init(withDoors doors: Int, andWheels wheels: Int, withSeats seats: Int) {
      self.numberOfDoors = doors
      self.numberOfWheels = wheels
      self.numberOfSeats = seats
  }
}

let someCar = Car(withDoors: 4, andWheels: 2, withSeats)

Answer 1 · 2020-04-27T21:24:13Z

April 27, 2020 9:24pm

Hey George - When you're trying to initialise properties that are in a subclass, you need to initialise them using super.init after your classes properties have been initialised.

I also noticed that the declaration of someCar on line 20 is missing a withSeats declaration and that you were initialising numberOfSeats with a hardcoded value in the class itself. I've attached the modified code below - seems to pass ok. Hope this helps!

class Vehicle {
  var numberOfDoors: Int
  var numberOfWheels: Int

  init(withDoors doors: Int, andWheels wheels: Int) {
      self.numberOfDoors = doors
      self.numberOfWheels = wheels
  }
}

// Enter your code below
class Car: Vehicle {
  let numberOfSeats: Int

    init(withDoors doors: Int, andWheels wheels: Int, withSeats seats: Int) {
        self.numberOfSeats = seats
        super.init(withDoors: doors, andWheels: wheels)
    }
}

let someCar = Car(withDoors: 4, andWheels: 2, withSeats: 1)

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George Gregorczyk

George Gregorczyk

I get an error that I can't override.

1 Answer

Thomas Oliver Bastable

Thomas Oliver Bastable

Jhoan Arango

Jhoan Arango