import Foundation
// Enum for different types of vehicles
enum VehicleType {
case car
case truck
case motorcycle
case bicycle
func description() -> String {
switch self {
case .car:
return "Four-wheeled vehicle"
case .truck:
return "Large cargo vehicle"
case .motorcycle:
return "Two-wheeled motorized vehicle"
case .bicycle:
return "Two-wheeled pedal vehicle"
}
}
}
// Enum with associated values
enum Result<T> {
case success(T)
case failure(Error)
func getValue() -> T? {
switch self {
case .success(let value):
return value
case .failure:
return nil
}
}
}
// Vehicle class
class Vehicle {
let type: VehicleType
var speed: Double
init(type: VehicleType, speed: Double = 0.0) {
self.type = type
self.speed = speed
}
func accelerate(by amount: Double) {
speed += amount
}
func brake(by amount: Double) {
speed = max(0, speed - amount)
}
func getInfo() -> String {
return "\(type.description()) traveling at \(speed) km/h"
}
}
// Car class inheriting from Vehicle
class Car: Vehicle {
let numberOfDoors: Int
init(numberOfDoors: Int, speed: Double = 0.0) {
self.numberOfDoors = numberOfDoors
super.init(type: .car, speed: speed)
}
override func getInfo() -> String {
return "\(numberOfDoors)-door car traveling at \(speed) km/h"
}
}
