MathQuizForm1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MathQuiz
{
    public partial class mathquizForm1 : Form
    {
        // Create a Random object called randomizer  
        // to generate random numbers.
        Random randomizer = new Random();

        // These integer variables store the numbers  
        // for the addition problem.  
        int addend1;
        int addend2;

        // These integer variables store the numbers  
        // for the subtraction problem.  
        int minuend;
        int subtrahend;

        // These integer variables store the numbers  
        // for the multiplication problem.  
        int multiplicand;
        int multiplier;

        // These integer variables store the numbers  
        // for the division problem.  
        int dividend;
        int divisor;

        // This integer variable keeps track of the  
        // remaining time. 
        int timeLeft;

        /// Start the quiz by filling in all of the problems 
        /// and starting the timer. 

        public void StartTheQuiz()
        {
            // Fill in the addition problem. 
            // Generate two random numbers to add. 
            // Store the values in the variables 'addend1' and 'addend2'.
            addend1 = randomizer.Next(51);
            addend2 = randomizer.Next(51);

            // Convert the two randomly generated numbers 
            // into strings so that they can be displayed 
            // in the label controls.
            plusLeftLabel.Text = addend1.ToString();
            plusRightLabel.Text = addend2.ToString();

            // 'addition' is the name of the NumericUpDown control. 
            // This step makes sure its value is zero before 
            // adding any values to it.
            addition.Value = 0;

            // Fill in the subtraction problem.
            minuend = randomizer.Next(1, 101);
            subtrahend = randomizer.Next(1, minuend);
            minusLeftLabel.Text = minuend.ToString();
            minusRightLabel.Text = subtrahend.ToString();
            soustraction.Value = 0;

            // Fill in the multiplication problem.
            multiplicand = randomizer.Next(2, 11);
            multiplier = randomizer.Next(2, 11);
            timesLeftLabel.Text = multiplicand.ToString();
            timesRightLabel.Text = multiplier.ToString();
            multiplication.Value = 0;

            // Fill in the division problem.
            divisor = randomizer.Next(2, 11);
            int temporaryQuotient = randomizer.Next(2, 11);
            dividend = divisor * temporaryQuotient;
            dividedLeftLabel.Text = dividend.ToString();
            dividedRightLabel.Text = divisor.ToString();
            division.Value = 0;
            
            // Start the timer, reset BackColor property.
            timeLeft = 30;
            timeLabel.Text = "30 secondes";
            timeLabel.BackColor = Color.Empty;
            timer1.Start();
        }

        /// Check the answer to see if the user got everything right. 
        /// True if the answer's correct, false otherwise. 

        private bool CheckTheAnswer()
        {
            if ((addend1 + addend2 == addition.Value)
                && (minuend - subtrahend == soustraction.Value)
                && (multiplicand * multiplier == multiplication.Value)
                && (dividend / divisor == division.Value))
                return true;
            else
                return false;
        }

        public mathquizForm1()
        {
            InitializeComponent();
        }

        private void label2_Click(object sender, EventArgs e)
        {

        }

        private void label1_Click(object sender, EventArgs e)
        {

        }

        private void label7_Click(object sender, EventArgs e)
        {

        }

        private void startButton_Click(object sender, EventArgs e)
        {
            StartTheQuiz();
            startButton.Enabled = false;
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (CheckTheAnswer())
            {
                // If CheckTheAnswer() returns true, then the user  
                // got the answer right. Stop the timer   
                // and show a MessageBox.
                timer1.Stop();
                MessageBox.Show("Toutes les réponses sont justes!",
                                "Félicitations!");
                startButton.Enabled = true;
            }
            if (timeLeft > 0)
            {

                // Display the new time left 
                // by updating the Time Left label.
                timeLeft = timeLeft - 1;
                timeLabel.Text = timeLeft + " secondes";
            }
            else
            {
                // If the user ran out of time, stop the timer, show 
                // a MessageBox, and fill in the answers.
                timer1.Stop();
                timeLabel.Text = "Temps écoulé!";
                MessageBox.Show("Vous n'avez pas réussi à terminer dans le temps disponible!", "Désolé, c'est perdu!");
                addition.Value = addend1 + addend2;
                soustraction.Value = minuend - subtrahend;
                multiplication.Value = multiplicand * multiplier;
                division.Value = dividend / divisor;
                startButton.Enabled = true;
            }
            if (timeLeft < 6)
            {
                // When only five seconds remain in a quiz, turn the timeLabel control red
                // by setting its BackColor property.
                timeLabel.BackColor = Color.Red;
            }
            else
            {
                // Reset the color when the quiz is over.
                timeLabel.BackColor = Color.Empty;
            }
        }

        private void answer_Enter(object sender, EventArgs e)
        {
            // Select the whole answer in the NumericUpDown control.
            NumericUpDown answerBox = sender as NumericUpDown;

            if (answerBox != null)
            {
                int lengthOfAnswer = answerBox.Value.ToString().Length;
                answerBox.Select(0, lengthOfAnswer);
            }
        }

        private void timeLabel_Click(object sender, EventArgs e)
        {

        }

        private void MathQuizForm1_Load(object sender, EventArgs e)
        {

        }
    }
}