43日目

日記

デバフがかかっている

今日書いたコード

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

class Bicycle: Vehicle {
    var hasBasket = false
}
let someBicycle = Bicycle()
someBicycle.hasBasket = true
someBicycle.currentSpeed = 15.0
print(someBicycle.description)

class Train: Vehicle {
    override func makeNoise() {
        print("Choo Choo")
    }
}

let train = Train()
train.makeNoise()
// Prints "Choo Choo"

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

let car = Car()
car.currentSpeed = 25.0
car.gear = 3
print("Car: \(car.description)")
// Car: traveling at 25.0 miles per hour in gear 3

初めて知ったこと

なし