using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.IO;

namespace Lab17b13

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            FileStream f = new FileStream("D:\\lab17.s1", FileMode.Open);

            StreamReader sr = new StreamReader(f);

            int x,i,n,l;

            string s;

            comboBox1.Items.Clear();

            while(!sr.EndOfStream)

            {

                i=0;

                n=0;

                s=sr.ReadLine();

                l=s.Length;

                for(x=0;x<l;x++)

                    if(s[x]==' ')

                    {

                        i++;

                        if(i==int.Parse(textBox1.Text))

                            n=x;

                    }

                comboBox1.Items.Add(n);

            }

            sr.Close();

            f.Close();

        }

        private void button2_Click(object sender, EventArgs e)

        {

            FileStream f = new FileStream("D:\\lab17.s2", FileMode.OpenOrCreate);

            StreamWriter sw = new StreamWriter(f);

            sw.WriteLine(comboBox1.Text);

            sw.Close();

            f.Close();

        }

    }

}