//
//  ViewController.swift
//  SemesterGrade-APP
//

import UIKit

class ViewController: UIViewController {

    
    // FINISH ME
    // link to your first TextField box
    @IBOutlet weak var quarter1TextField: UITextField!
    
    // FINISH ME
    // link to your second TextField box
    @IBOutlet weak var quarter2TextField: UITextField!
    

    // FINISH ME
    // link to your third TextField box
    @IBOutlet weak var examTextField: UITextField!
    
    
    // FINISH ME
    // link to your semester average Label
    @IBOutlet weak var semesterAverageLabel: UILabel!
    
    
    // FINISH ME
    // link to your calculate Button
    @IBAction func calculateButtonEvent(_ sender: UIButton)
    {
        // FINISH ME
        // get the q1Grade
        // first get the text from quarter1TextField and unwrap it
        // then convert this to a Double
        // i.e.  Double(the text unwrapped)
        let q1Grade ?  ?????(????)

        
        // FINISH ME
        // get the q2Grade
        // first get the text from quarter2TextField and unwrap it
        // then convert this to a Double
        let q2Grade ?  ?????(????)


        // FINISH ME
        // get the examGrade
        // first get the text from examTextField and unwrap it
        // then convert this to a Double
        let examGrade =  ?????(????)

        
        // FINISH ME
        // we now let Apple unwrap the optionals and store the number
        // into q1Grade, q2Grade, and examGrade (use shadowing)
        if let q1Grade = ?????,
           let ???? = ?????,
           let ???? = ?????
        {
            // FINISH ME
            // set semesterAverage to:
            //    40% of q1Grade plus 40% of q2Grade plus 20% of examGrade
            let semesterAverage = ??????
            
            
            // FINISH ME
            // set semesterAverageLabel to say "Average: ???"
            // where ??? is replaced by the semesterAverage
            semesterAverageLabel.text = ????
            
        }
        else
        {
            // FINISH ME
            // set semesterAverageLabel to say "Error"
            semesterAverageLabel.text = ?????
        }
    }
    
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}