func getInput(_ message : String)-> String?{
print(message, terminator : ":")
return readLine()
}
func getInputInt(_ message: String)->Int?{
if let inputString = getInput(message){
return Int(inputString)
} else {
return nil
}
}
var speedTotal = 0
func makeIncrementer(forIncrement amount: Int)->()->Int{
func incrementer() -> Int{
speedTotal += amount
return speedTotal
}
return incrementer
}
func makeDecrementer(forDecrement amount: Int)->()->Int{
func decrementer()-> Int{
speedTotal -= amount
return speedTotal
}
return decrementer
}
let incrementByTen = makeIncrementer(forIncrement: 10)
let decrementByTen = makeDecrementer(forDecrement: 10)
// menyalakan mesin motor listrik
func turnOnEngine() {
print("Hidupkan mesin.........")
print("Selamat datang di Motor Listrik Dicoding")
print("Brem brem brem brem")
}
// mematikan mesin motor listrik
func turnOffEngine() {
print("Ciiiiiiiitttttt......")
print("Motor berhenti!!!!")
}
// menampilkan kecepatan saat ini
func showSpeed() {
print("Kecepatan saat ini : \(speedTotal)")
print("Ngeeeeengggggggg")
}
func action() {
print("----------------------------------------")
print("Ayo beraksi:")
print("[1] Tambahkan kecepatan")
print("[2] Kurangi kecepatan")
print("[3] Matikan mesin")
if let state = getInputInt("Masukkan menu"){
switch state{
case 1:
speedTotal = incrementByTen()
showSpeed()
action()
break
case 2:
if speedTotal > 0 {
speedTotal = decrementByTen()
showSpeed()
action()
} else {
turnOffEngine()
break
}
break
case 3:
turnOffEngine()
break
default:
break
}
} else {
print("Tidak valid!")
}
}
turnOnEngine()
action()
