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  1. using System;
  2.  
  3. public class Test
  4. {
  5.  
  6. 	public static void Main()
  7. 	{
  8. 		Test cipher = new Test();
  9. 		string input = "Hello World";
  10. 		Console.WriteLine(input);
  11. 		string enc = cipher.Encrypt(input, 5);
  12. 		Console.WriteLine(enc);
  13. 		string dec = cipher.Decrypt(enc, 5);
  14. 		Console.WriteLine(dec);
  15.  
  16. 	}
  17.  
  18.     public string removeSpaces(string plainIn)
  19.     {
  20.         return plainIn.Replace(" ", string.Empty);
  21.     }
  22.  
  23.     public string reverse(string plainIn)
  24.     {
  25.         char[] charArray = plainIn.ToCharArray();
  26.         Array.Reverse(charArray);
  27.         return new string(charArray);
  28.     }
  29.  
  30.     public string toUCase(string strIn)
  31.     {
  32.         return strIn.ToUpper();
  33.     }
  34.  
  35.     private const int LETTERA = (int)'A';
  36.     private const int LETTERS = (int)'Z' - LETTERA + 1;
  37.  
  38.     public string shift(string plainIn, int shift)
  39.     {// 65=a 90=z in ASCII
  40.         string readOut=string.Empty;
  41.         char[] charArray;
  42.  
  43.         charArray = plainIn.ToCharArray();
  44.         for (int i = 0; i < charArray.Length; i++)
  45.         {
  46.         	//Console.WriteLine("Char {0} is {1} and maps to {2} and shifts to {3}",
  47.         	//    i, charArray[i], (int)charArray[i] - LETTERA, 
  48.         	//    (((int)charArray[i] - LETTERA + shift) % LETTERS)
  49.         	//);
  50.         	//char c = (char)(LETTERA + (((int)charArray[i] + shift - LETTERA + LETTERS)
  51.             //         % LETTERS));
  52.             //Console.WriteLine("Char {0}", c);
  53.             readOut += (char)(LETTERA + (((int)charArray[i] + shift - LETTERA + LETTERS) % LETTERS));
  54.             //int Num = Convert.ToInt32(charArray[i]) + shift;
  55.             //readOut += Convert.ToChar(Num > 90 ? Num -= 26 : (Num < 65 ? Num += 26: Num));
  56.         }
  57.         return readOut;
  58.     }
  59.  
  60.     //this method will take all of these methods and put them together to encrypt
  61.     public string Encrypt(string ReadIn, int Shift)
  62.     {
  63.         ReadIn = removeSpaces(ReadIn);
  64.         ReadIn = reverse(ReadIn);
  65.         ReadIn = toUCase(ReadIn);
  66.         ReadIn = shift(ReadIn, Shift);
  67.         return ReadIn;
  68.     }
  69.  
  70.     public string Decrypt(string ReadIn, int amountShift)
  71.     {
  72.         ReadIn = reverse(ReadIn);// undo the reverse by running the method again
  73.         ReadIn = shift(ReadIn, -amountShift);
  74.  
  75.         return ReadIn;
  76.     }       
  77. }
Success #stdin #stdout 0.03s 33912KB
comments (?)
stdin 
Standard input is empty
stdout 
Hello World
IQWTBTQQJM
HELLOWORLD
https://ideone.com/oW6Q4g
language:
C# (gmcs 5.20.1)
created:
11 years ago
visibility:
public

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