Einfache C# Verschlüsselungsprogramm Probleme

Question

halte ich eine nicht behandelte Ausnahme des Typs ‚System.ArgumentOutOfRangeException bekommen Weitere

Informationen: Index und Länge an einer Stelle in der Zeichenfolge beziehen.

i die Arrays auf einen festen amout Einstellung haben versucht, aber ich halte das gleiche Problem UNTER

PROGRAMM bekommen

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

namespace encryptionApp 
{ 
    class Program 
    { 

     //function to chage substring to number 
     public static int ToNumber(string subString) 
     { 
      int returnInt; 

      // string to number convestion switch 
      switch (subString) 
      { 
       case "A": 

        returnInt = 1; 
        return returnInt; 

       case "B": 

        returnInt = 2; 
        return returnInt; 

       case "C": 

        returnInt = 3; 
        return returnInt; 

       case "D": 

        returnInt = 4; 
        return returnInt; 

       case "E": 

        returnInt = 5; 
        return returnInt; 

       case "F": 

        returnInt = 6; 
        return returnInt; 

       case "G": 

        returnInt = 7; 
        return returnInt; 

       case "H": 

        returnInt = 8; 
        return returnInt; 

       case "I": 

        returnInt = 9; 
        return returnInt; 

       case "J": 

        returnInt = 10; 
        return returnInt; 

       case "K": 

        returnInt = 11; 
        return returnInt; 

       case "L": 

        returnInt = 12; 
        return returnInt; 

       case "M": 

        returnInt = 13; 
        return returnInt; 

       case "N": 

        returnInt = 14; 
        return returnInt; 

       case "O": 

        returnInt = 15; 
        return returnInt; 

       case "P": 

        returnInt = 16; 
        return returnInt; 

       case "Q": 

        returnInt = 17; 
        return returnInt; 

       case "R": 

        returnInt = 18; 
        return returnInt; 

       case "S": 

        returnInt = 19; 
        return returnInt; 

       case "T": 

        returnInt = 20; 
        return returnInt; 

       case "U": 

        returnInt = 21; 
        return returnInt; 

       case "V": 

        returnInt = 22; 
        return returnInt; 

       case "W": 

        returnInt = 23; 
        return returnInt; 

       case "X": 

        returnInt = 24; 
        return returnInt; 

       case "Y": 

        returnInt = 25; 
        return returnInt; 

       case "Z": 

        returnInt = 26; 
        return returnInt; 

       case "1": 

        returnInt = 27; 
        return returnInt; 

       case "2": 

        returnInt = 28; 
        return returnInt; 

       case "3": 

        returnInt = 29; 
        return returnInt; 

       case "4": 

        returnInt = 30; 
        return returnInt; 

       case "5": 

        returnInt = 31; 
        return returnInt; 

       case "6": 

        returnInt = 32; 
        return returnInt; 

       case "7": 

        returnInt = 33; 
        return returnInt; 

       case "8": 

        returnInt = 34; 
        return returnInt; 

       case "9": 

        returnInt = 35; 
        return returnInt; 

       case "0": 

        returnInt = 36; 
        return returnInt; 

       case " ": 
        returnInt = 37; 
        return returnInt; 

       default: 

        subString = " "; 
        return 0;   
      } 
     } 

     //function to convrt back to string 
     public static string ToText(int subInt) 
     { 
      string subString; 

      // number to string conversion swith 
      switch (subInt) 
      { 
       case 1: 

        subString = "A"; 
        return subString; 

       case 2: 

        subString = "B"; 
        return subString; 

       case 3: 

        subString = "C"; 
        return subString; 

       case 4: 

        subString = "D"; 
        return subString; 

       case 5: 

        subString = "E"; 
        return subString; 

       case 6: 

        subString = "F"; 
        return subString; 

       case 7: 

        subString = "G"; 
        return subString; 

       case 8: 

        subString = "H"; 
        return subString; 

       case 9: 

        subString = "I"; 
        return subString; 

       case 10: 

        subString = "J"; 
        return subString; 

       case 11: 

        subString = "K"; 
        return subString; 

       case 12: 

        subString = "L"; 
        return subString; 

       case 13: 

        subString = "M"; 
        return subString; 

       case 14: 

        subString = "N"; 
        return subString; 

       case 15: 

        subString = "O"; 
        return subString; 

       case 16: 

        subString = "P"; 
        return subString; 

       case 17: 

        subString = "Q"; 
        return subString; 

       case 18: 

        subString = "R"; 
        return subString; 

       case 19: 

        subString = "S"; 
        return subString; 

       case 20: 

        subString = "T"; 
        return subString; 

       case 21: 

        subString = "U"; 
        return subString; 

       case 22: 

        subString = "V"; 
        return subString; 

       case 23: 

        subString = "W"; 
        return subString; 

       case 24: 

        subString = "X"; 
        return subString; 

       case 25: 

        subString = "W"; 
        return subString; 

       case 26: 

        subString = "Z"; 
        return subString; 

       case 27: 

        subString = "1"; 
        return subString; 

       case 28: 

        subString = "2"; 
        return subString; 

       case 29: 

        subString = "3"; 
        return subString; 

       case 30: 

        subString = "4"; 
        return subString; 

       case 31: 

        subString = "5"; 
        return subString; 

       case 32: 

        subString = "6"; 
        return subString; 

       case 33: 

        subString = "7"; 
        return subString; 

       case 34: 

        subString = "8"; 
        return subString; 

       case 35: 

        subString = "9"; 
        return subString; 

       case 36: 

        subString = "0"; 
        return subString; 

       case 37: 
        subString = " "; 
        return subString; 

       default: 

        subString = " "; 
        return subString; 
      } 
     } 

     static void Main(string[] args) 
     { 
      // my variubles 
      string message; 
      string encMessage = ""; 
      int encKey; 
      int keyCount = 0; 
      int tempInt; 
      string userChoice; 

      //get user choice 
      Console.WriteLine("Press [1] to Encrypt a message\n" 
           + "Press [2] to Decrypt a message"); 
      userChoice = Console.ReadLine(); 

      //ask user for message 
      Console.WriteLine("Plaeas enter the message"); 
      message = Console.ReadLine(); 

      // make array of ints and strings 
      int[] messageInt = new int[message.Length]; 
      string[] messageString = new string[message.Length]; 

      //ask user for Key 
      Console.WriteLine("Please enter Eyncrytion Key"); 
      encKey = int.Parse(Console.ReadLine()); 

      //start for loop to brake up message into ints 
      for (int i = 0; i <= message.Length; i++) 
      { 
       //set message to numbers 
       //THIS IS AS FAR AS THE PROGRAM QILL GET 
       tempInt = ToNumber(message.Substring(i, i)); 

       // create array of chars 
       messageInt[i] = tempInt; 

      } 

      //loop to change numbers back to strings 
      for (int i = 0; i <= message.Length; i++) 
      { 
       // changenumber of message String array to ecnipt the message 
       messageInt[i] = messageInt[i] + ToNumber(encKey.ToString().Substring(keyCount, keyCount)); 

       if (messageInt[i] > 37) 
       { 
        messageInt[i] = messageInt[i] - 37; 
       } 

       //use ToString function to chage number back to enyncripted letter 
       messageString[i] = ToText(messageInt[i]); 

       // if else statment used to set part of ecnKey that is used 
       if (keyCount < encKey.ToString().Length) 
       { 
        keyCount++; 
       } 
       else 
       { 
        keyCount = 0; 
       } 
      } 

      // combine string array to make ecnipted message 
      for (int i = 0; i <= message.Length; i++) 
      { 
       encMessage = encMessage + messageString[i]; 
      } 

      Console.WriteLine(encMessage); 


      //pause App 
      Console.ReadLine(); 
     } 
    } 
} 

Answer 1

Ich glaube, dies ist der Fehler: Da Indizes

int[] messageInt = new int[message.Length]; 
... 
for (int i = 0; i <= message.Length; i++) 

sind 0, das größte Element im Array wird nicht den Index of the message.Length haben, sondern von message.Length - 1. Um dies zu beheben, ersetzen Sie einfach:

for (int i = 0; i <= message.Length; i++) 

mit diesem:

for (int i = 0; i < message.Length; i++) 

Answer 2

Ich würde es tun, wie dies

 static List<string> convertArray = new List<string>() { "START", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", " " }; 
     static void Main(string[] args) 
     { 
     } 
     public static int ToNumber(string subString) 
     { 
      int results = convertArray.IndexOf(subString); 
      if (results == -1) results = 0; 
      return results; 
     } 
     public static string ToText(int subInt) 
     { 
      string results = " "; 
      if (subInt > 0 && subInt < convertArray.Count()) 
      { 
       results = convertArray[subInt]; 
      } 
      return results; 
     }