Overriding Properties

gistfile1.swift

class Vehicle {
	var currentSpeed = 0.0
	var description: String {
		return "traveling at \(currentSpeed) miles per hour"
	}
	func makeNoise() {
		// do nothing - an arbitrary vehicle doesn't necessarily make a noise
	}
}


class Car: Vehicle {
	var gear = 1
	override var description: String {
		return super.description + " in gear \(gear)"
	}
}