W2D2-Answers.txt

//: # W2D2 Review - Variables and Types
//:
//: ## Challenge 1


mph = 10


//: ## Challenge 2

greeting = greeting + ", Danny"


//: ## Challenge 3


// bicycleCount type is: Int
// isGood's type is: Bool


//: # W2D2 Review - Control Flow
//:
//: ## Challenge 1


if kph > 0 {
    print("We are moving \(kph) km/h")
} else {
    print("We are standing still")
}


//: ## Challenge 2


if kph > 30.00 {
    print("Whoa slow down buddy, \(kph) km/h is too fast for this school zone!")
} else if kph > 0 {
    print("We are moving \(kph) km/h")
} else {
    print("We are standing still")
}


//: # W2D2 Review - Functions
//:
//: ## Challenge 1


travel("Cory", distance: 10)

//: ## Challenge 2

func describeSpeed(kph: Double) {
    if kph > 30.00 {
        print("Whoa slow down buddy, \(kph) km/h is too fast for this school zone!")
    } else if kph > 0 {
        print("We are moving \(kph) km/h")
    } else {
        print("We are standing still")
    }
}

//: ## Challenge 3

func speedDescription(kph: Double) -> String {
    if kph > 30.00 {
        return "Whoa slow down buddy, \(kph) km/h is too fast for this school zone!"
    } else if kph > 0 {
        return "We are moving \(kph) km/h"
    } else {
        return "We are standing still"
    }
}



//: # W2D2 - Classes
//:
//: ## Challenge 1

class Bicycle {
    var numberOfGears: Int = 10
    var currentGear: Int = 1
    
    func gearUp() {
        currentGear = currentGear + 1
    }
    
    func gearDown() {
        currentGear = currentGear - 1
    }
}


//: ## Challenge 2


class Bicycle {
    let numberOfGears: Int
    var currentGear: Int = 1
    
    func gearUp() {
        currentGear = currentGear + 1
    }
    
    func gearDown() {
        currentGear = currentGear - 1
    }
    
    init(gears: Int) {
        self.numberOfGears = gears
    }
}



//: ## Bonus Challenge


class Cube: Box {
    var depth: Double = 0
    
    override func area() -> Double {
        return depth * width * height
    }
}

let myCube = Cube()
myCube.depth = 10
myCube.height = 5
myCube.width = 3

myCube.area()