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//
// ViewController.swift
// Space Calculator
//
// Created by Lucifer Conrad Reeves on 07/07/18.
// Copyright © 2018 Lucifer Reeves. All rights reserved.
//
import UIKit
import AVFoundation
class ViewController: UIViewController {
@IBOutlet weak var outputLbl: UILabel!
var btnSound: AVAudioPlayer!
enum Operation:String {
case Divide = "/"
case Add = "+"
case Subtract = "-"
case Multiply = "*"
case Empty = "Empty"
}
var runningNumber = ""
var left = ""
var right = ""
var currentOperation = Operation.Empty;
var result = ""
override func viewDidLoad() {
super.viewDidLoad()
let path = Bundle.main.path(forResource: "btn", ofType: "wav")
let soundURL = URL(fileURLWithPath: path!)
do {
try btnSound = AVAudioPlayer(contentsOf: soundURL)
btnSound.prepareToPlay()
} catch let err as NSError {
print(err.debugDescription)
}
outputLbl.text = "0"
}
@IBAction func numberPressed(sender: UIButton) {
playSound()
runningNumber += "\(sender.tag)"
outputLbl.text = runningNumber
}
@IBAction func onDividePressed(sender: Any) {
processOperation(operation: .Divide)
}
@IBAction func onMultiplyPressed(sender: Any) {
processOperation(operation: .Multiply)
}
@IBAction func onAddPressed(sender: Any) {
processOperation(operation: .Add)
}
@IBAction func onSubractPressed(sender: Any) {
processOperation(operation: .Subtract)
}
@IBAction func onEqualPressed(sender: Any){
processOperation(operation: currentOperation)
}
@IBAction func onClearPressed(sender: Any) {
playSound()
result = ""
left = ""
right = ""
runningNumber = ""
currentOperation = Operation.Empty
outputLbl.text = "0"
}
func playSound() {
if btnSound.isPlaying {
btnSound.stop()
}
btnSound.play()
}
func processOperation(operation:Operation) {
playSound()
if currentOperation != Operation.Empty {
if runningNumber != "" {
right = runningNumber
runningNumber = ""
if currentOperation == Operation.Divide {
result = "\(Double(left)! / Double(right)!)"
} else if currentOperation == Operation.Subtract {
result = "\(Double(left)! - Double(right)!)"
} else if currentOperation == Operation.Multiply {
result = "\(Double(left)! * Double(right)!)"
} else if currentOperation == Operation.Add {
result = "\(Double(left)! + Double(right)!)"
}
left = result
outputLbl.text = result
}
currentOperation = operation
} else {
left = runningNumber
runningNumber = ""
currentOperation = operation
}
}
}
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