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iOS Object-Oriented Swift Value vs Reference Types Final Challenge

Girri M Palaniyapan
Girri M Palaniyapan
7,829 Points

Unsure why I am getting this error message

I am specifically getting this error message. Unsure why though.

swift_lint.swift:17:1: error: overriding declaration requires an 'override' keyword init(wheels: Int, doors: Int){ ^ override swift_lint.swift:8:5: note: overridden declaration is here init(wheels:Int, doors:Int){ ^

class Vehicle {
    let wheels: Int
    let doors: Int

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


class Car: Vehicle {

init(wheels: Int, doors: Int){
super.init(wheels: wheels, doors: doors)


1 Answer

150,854 Points

Hi Girri,

You're almost there: your designated initializer is what it needs to be.

The program's comments tell us that a Car must have 4 wheels and 4 doors by default. So, we want to specify that when we overwrite the init() method with our super.init() method.

class Car: Vehicle {
    // A car must default to 4 wheels and 4 doors
      // call super.init
      super.init(wheels: 4, doors: 4)

Hope this helps!