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

No error, error

In the editor, I have provided a class named Vehicle.

Your task is to create a subclass of Vehicle, named Car, that adds an additional stored property numberOfSeats of type Int with a default value of 4.

Once you've implemented the Car class, create an instance and assign it to a constant named someCar.

It says that my code can't be compiled but when I view Preview there are no compiler errors.

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: Int = 4
}

let someCar = car(withDoors: 5, andWheels: 5)

2 Answers

Michael Hulet
Michael Hulet
47,913 Points

The "code cannot be compiled" message here seems like a bad error message to me, because Swift handles it just fine on my machine. I think the main thing that went wrong here is that the challenge asked for a class named Car, but the one you made is named car (be sure to pay attention to capitalization! It matters in Swift). If you fix that, I think you'll be good

cool thank you so much!

Please provide a best answer for Michael :)