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

namespace _7.DecodeAndEncodeText
{
    class DecodeAndEncodeText
    {
        static void Main()
        {
            //Console.WriteLine("Enter a string:");
            //string str = Console.ReadLine();
            //Console.WriteLine("Enter a cipfer:");
            //string cipfer = Console.ReadLine();

            string str = "racho reje riba i petar plet plete";
            string cipfer = "key";
            //Encryption
            StringBuilder encryption = new StringBuilder();
            for (int i = 0, cipfCounter = 0; i < str.Length; i++ , cipfCounter++)
            {
                encryption.Append((char)((int)str[i] ^ (int)cipfer[cipfCounter]));
                if (cipfCounter + 1 == cipfer.Length)
                {
                    cipfCounter = 0;
                }
            }
            string encryptedString = encryption.ToString();
            Console.WriteLine("The encrypted string is:");
            Console.WriteLine(encryptedString);

            //Encryption
            StringBuilder decryption = new StringBuilder();
            for (int i = 0, cipfCounter = 0; i < encryptedString.Length; i++, cipfCounter++)
            {
                decryption.Append((char)((int)encryptedString[i] ^ (int)cipfer[cipfCounter]));
                if (cipfCounter + 1 == cipfer.Length)
                {
                    cipfCounter = 0;
                }
            }
            Console.WriteLine("The decrypted string is:");
            Console.WriteLine(decryption.ToString());
        }
    }
}