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iOS Object-Oriented Swift Class Inheritance Creating a Subclass

Tyler Dotson
PRO
Tyler Dotson
Pro Student 1,740 Points

i stopped writing the code but am i on the right track?

does the challenge want me to add 4 seats to the all ready 4 seats in the class vehicle ?

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 {
    override init(withDoors door: Int, andWheels wheel: Int)
    super.init(withDoors door: 4, andWheels wheel: 4)

}

1 Answer

Andrew Boryk
Andrew Boryk
15,916 Points

Hey Tyler,

So what the challenge is asking is that you create a subclass of the Vehicle class named Car, which you did!

Now, the challenge isn't asking you to override the init method, so you can delete that. However, the challenge does ask for a new variable for the Car class named 'numberOfSeats' with a type of Int and a default value of 4. And after, to create a constant named 'someCar' and create an instance of Car. This can be achieved with this code:

// Enter your code below
class Car: Vehicle {
  var numberOfSeats = 4
}  

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