Matematické Fórum

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Cezar
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = 1, key = 1;


            Console.WriteLine("Zadejte slovo, které chcete zašifrovat:");
            string s = Console.ReadLine();

            Console.WriteLine("Zadajte klič:");
            key = Convert.ToInt32(Console.ReadLine());

            string text = " ";

            string abcda = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

            int m = abcda.Length; 

            for (int i = 0; i < s.Length; i++)
            {
                for (int j = 0; j < abcda.Length; j++)
                {
                    if (s[i] == abcda[j]) 
                    {
                        int temp = j * n + key;

                        while (temp >= m)
                            temp -= m;

                        text = text + abcda[temp];
                    }
                }

            }

            Console.WriteLine("Šifrované slovo:" +text);
            Console.ReadLine();
        }
    }
}