Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Object-Oriented Swift Class Inheritance Creating a Subclass

Michel Ortega
Michel Ortega
2,279 Points

Expected separator ?

Why am I getting this error? <Expected ',' separator> ?

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{
    var numberOfSeats =  4

    override init(withDoors doors: Int, andWheels wheels: Int){
        super.init( withDoors doors: doors, andWheels wheels:  wheels )

    }

}

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

1 Answer

This is the correct code:

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 {
var numberOfSeats: Int = 4
}

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

You should remove doors and wheels when making the instance of Car which is someCar And there is no need to reinitialize the Car class since it is already initialized in its parent class and because numberOfSeats has a value.

Michel Ortega
Michel Ortega
2,279 Points

Thanks a lot. KISS then... xoxo