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iOS Object-Oriented Swift Value vs Reference Types Final Challenge

Posted by Edgard Silva
Edgard Silva
2,711 Points

Not quite sure what to do here for the object oriented final question

I'm not sure what properties i'm supposed to create in this the second class (car class). i have attached my code in this question. I however haven't done much since i'm not really clear on what to do. If someone can just point me in the right direction i would really appreciate it

Vehicle.swift 
class Vehicle {
    let wheels: Int
    let doors: Int

    // Designated initializer
    init(wheels:Int, doors:Int)
    {
      self.wheels = wheels
      self.doors = doors
    }
}

class Car: Vehicle 
{

    // A car must default to 4 wheels and 4 doors
    init(wheels : Int, doors: Int )
    {
      // call super.init
    }
}

1 Answer

Enara L. Otaegi
Enara L. Otaegi
13,107 Points
Enara L. Otaegi
Enara L. Otaegi
13,107 Points

The subclass Car has no extra properties and in the init method you can read that 

// A car must default to 4 wheels and 4 doors

So you have to call the super.init method and pass in those values.

init(wheels : Int, doors: Int )
    {
      // call super.init
     super.init(wheels: 4, doors: 4)
    }