Thread: Application to solve the classic Locker Problem

I have programmed an application to solve this problem and will also include the source code for it.

Code:

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

namespace Lockers
{
    public partial class frmLockers : Form
    {
        int[] Lockers;

        public frmLockers()
        {
            InitializeComponent();
        }

        private void frmLockers_Load(object sender, EventArgs e)
        {
            txtLockers.Focus();
        }

        private void btnRun_Click(object sender, EventArgs e)
        {
            try
            {
                int iLockers = Convert.ToInt32(txtLockers.Text) + 1;

                rtbOutput.Clear();

                Simulate(iLockers);
                DisplayOutput(iLockers);
            }
            catch
            {
                MessageBox.Show("Your input was not in integer format!");
            }
            
        }

        private void Simulate(int iLockers)
        { 
            Lockers = new int[iLockers];

            prgLockers.Maximum = iLockers - 1;


            for (int i = 1; i <= iLockers - 1; i++)
            {
                Lockers[i] = -1;
            }


            for (int iLearner = 1; iLearner <= iLockers - 1; iLearner++)
            {
                for (int iLockerNum = 1; iLockerNum <= iLockers - 1; iLockerNum++)
                {
                    if ((iLockerNum) % (iLearner) == 0)
                    {
                        Lockers[iLockerNum] = Lockers[iLockerNum] * (-1);
                    }
                }
                prgLockers.Value = iLearner;
                Application.DoEvents();
            }
        }

        private void DisplayOutput(int iLockers)
        {

            string sOutput = "";
            int iLockersOpen = 0;

            for (int i = 1; i <= iLockers - 1; i++)
            {
                if (Lockers[i] == 1)
                {
                    sOutput += i.ToString() + " is open.\n";
                    iLockersOpen++;
                }
                else
                {
                    sOutput += i.ToString() + " is closed.\n";
                }

            }

            rtbOutput.Text = "Lockers open: " + iLockersOpen.ToString() + "\n\n" + sOutput;
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

    }
}