90 lines
2.2 KiB
C#
90 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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using System.IO;
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namespace WindowsFormsApp2
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{
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public partial class Form1 : Form
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{
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int n;
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public Form1()
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{
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InitializeComponent();
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}
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private void button1_Click(object sender, EventArgs e)
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{
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n = 0;
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string filename = "szamok.txt";
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if (File.Exists(filename))
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{
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StreamReader streamReader = File.OpenText(filename);
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while (!streamReader.EndOfStream && n < 100)
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{
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int val = Convert.ToInt32(streamReader.ReadLine());
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if (val % 2 == 0)
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{
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listBox1.Items.Add(val);
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}
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else
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{
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listBox2.Items.Add(val);
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}
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Data.szamok[n] = val;
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n++;
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}
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streamReader.Close();
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}
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else
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{
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MessageBox.Show("HIBA!!");
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}
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}
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private void button2_Click(object sender, EventArgs e)
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{
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string filename = "paros.txt";
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StreamWriter sw = File.CreateText(filename);
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for (int i = 0; i < n; i++)
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{
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if (Data.szamok[i] % 2 == 0)
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{
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sw.WriteLine(Data.szamok[i]);
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}
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}
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sw.Close();
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}
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}
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public static class Data
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{
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public const int MAX = 100;
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public static int[] szamok = new int[MAX];
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}
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}
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/*
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*
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* creation of 100 random numbers
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FileStream fs = new FileStream("szamok.txt", FileMode.Create, FileAccess.ReadWrite);
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StreamWriter streamWriter = new StreamWriter(fs);
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Random random = new Random();
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for (int i = 0; i < 100; i++)
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{
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streamWriter.WriteLine(random.Next(1, 10));
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}
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streamWriter.Close();
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fs.Close();
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*/ |