Xcode is crashing after doing what this video states.

This thing keeps saying that Communication with the playground service was interrupted unexpectedly. It worked flawlessly on previous videos prior to this one.

// Convenience Initializer import UIKit

//struct does not need an initializer, one is provided by default //stored properties, constants or variables

/quadcopter.price = 199.99/

class Product { //base class and super class of clothing let title: String var price: Double = 0.0 //Xcode made me change to Var from let

init(title: String, price: Double) {
    self.title = title
    self.price = price
}

func discountedPrice(percentage: Double) -> Double {
    return price - (price * percentage / 100)
}

}

enum Size { case Small, Medium, Large init () { self = .Small } } class Clothing: Product { //subclass var size = Size() let designer: String

init (title: String, price: Double, designer: String) {
    self.designer = designer
    super.init(title: title, price: price)
}

convenience init(title: String) {
   self.init(title:title,price:99,designer:"Calvin Klein")
        }


override func discountedPrice(percentage: Double = 10.0) -> Double {
    return super.discountedPrice(percentage)
}

}

var tshirt = Clothing(title: "Vintage") tshirt.title tshirt.price tshirt.designer tshirt.discountedPrice(50) tshirt.size

let quadcopter = Product(title: "Quadcopter", price: 499.99)