using System;
using System.Windows.Forms;

namespace DistanceConverter
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void buttonConvert_Click(object sender, EventArgs e)
        {
            double userInput = Convert.ToDouble(textBoxEnterDistance.Text);

            double temp;

            double sr = userInput / 2;

            if (userInput > 0 || //not a text or empty)
            {
                do
                {
                    temp = sr;
                    sr = (temp + (userInput / temp)) / 2;
                } while ((temp - sr) != 0);

                textBoxConvertedDistance.Text = sr.ToString();


            }
            else
            {
                MessageBox.Show("You must use digits and your number must be positive");
            }




        }


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