Example framework for string manipulation example (simple substitution cipher). Introduction to Programming, Summer 2018

Cipher.cs

using System.Linq;

namespace Cipher
{
    class Cipher
    {
        string alphabet;
        string substitute;

        public Cipher()
        {
            alphabet = "abcdefghijklmnopqrstuvwxyz";
            substitute = "opdefghiqrsxyzabcjklmntuvw";
        }

        public string Encrypt(string _message)
        {
            int index;
            char replacement = 'z';
            string result = "";
            _message = _message.ToLower();

            foreach (char c in _message)
            {
                //add code here to replace each character c
                //with the letter from the same index number in the substitute string
            }

            return result;
        }

        public string Decrypt(string _message)
        {
            string result = "";
            return result;
        }
    }
}

Message.cs

using static System.Console;

namespace Cipher
{
    class Message
    {

        public Message()
        {
            WriteLine("Hello agent.");
            Run();
        }

        private void Run()
        {
            
            Cipher cipher = new Cipher();
            string message;
            Clear();
            Write("Enter text: ");
            message = ReadLine();
            WriteLine(cipher.Encrypt(message));
            
            WriteLine("Press any key to continue...");
            ReadKey();
            Run();
        }
    }
}

Program.cs

using System;

namespace Cipher
{
    class Program
    {
        static void Main()
        {
            Console.Title = "Manipulating String Example: Simple Cipher";
            Message message = new Message();
        }
    }
}