Kirish. Kurs ishini vazifalari: I. Bob. Axborot tushunchasi va uni turlari. Axborot xavfsizligi

Fundamentals of computer programming with c#. (the bulgarian c# programming book) © svetlin nakov & со., 2013

https://metanit.com/sharp/tutorial/

http://eduportai.uz/Umumivfiies/darslikiar/7/informatika 7 uzb.pdf

ILOVALAR.
Sezar usuli yordamida matnni shifrlash dastur kodi: 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 WindowsFormsAppIicationl
{
publicpartialclassForml : Form
{
// Bu yerda string tipi orqali alifboni kichik harflari elon qilinadi; string si = "abcdefghijklmnopqrstuvwxyz";
// Bu yerda string tipi orqali alifboni katta harflari elon qilinadi; string s2 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
// s tipidagi o’zgaruvchi elon qilinyapti; string s = public Forml()
{
In itia lizeCom ponen t();
}
privatevoid Forml_Load(object sender, EventArgs e)
{
}
privatevoid buttonl_Click(object sender, EventArgs e)
{
s =
label3.Text = "Shifr matn"; labeE.Text = ’’matn”; int index;
int к = int.Parse(textBoxl.Text); foreach (char c in richTextBoxl.Text)
{
if (sl.Contains(c))
{
index=sl.IndexOf(e); int i=(index+k)%26;
s+=sl[i];
}
elseif (s2.Contains(c))
{
index=s2.IndexOf(c);
int i=(index+k) % 26;s+=s2[i];
}
else s+=c;
}
richTextBox2.Text = s;
}
privatevoid button2_Click(object sender, EventArgs e)
{
labe!2.Text = "Shifr matn"; label3.Text = ’’matn'¹;
s =
int index;
int к = int.Parse(textBoxl.Text); к = к % 26;
foreach (char c in richTextBoxl.Text)
{
int i;
if (sl.Contains(c))
{
index = sl.IndexOf(c);
if (index - к < 0) i = 26 + index - k;
else i = index - k;
s += sl[i];
}
elseif (s2.Contains(c))
{
index = sl.IndexOf(c);
if (index - к < 0) i = 26 + index - k;
else i = index - k;
s += s2[i];
}