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 Form1 : 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;

        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();

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

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


        }

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