C# 如何将输入字符串与数组中的索引相等

我试着做这个程序，当我把一个字母输入到一个输入字段时，输出文本在输入文本字母后显示字母，比如a应该是b，或者b应该是c，等等。所以我想我可以为字母表创建一个字符串数组，如果输入字母等于循环数组的索引，那么结果将等于索引+1。我试过了，它给了我和输入一样的东西。我错过什么了吗

public class Encryption : MonoBehaviour
{
public InputField input;
public Text output;
string inputText;

public Toggle L337Toggle;
public Toggle CharShiftToggle;
public Toggle DoubleCaseToggle;
public Toggle VowelToggle;

void Start()
{
    L337Toggle.isOn = false;
    CharShiftToggle.isOn = false;
    DoubleCaseToggle.isOn = false;
    VowelToggle.isOn = false;
}
private void Update()
{
    inputText = input.text;

    output.text = inputText;


    IEncryption _textEncryption = new TextEncryption(inputText);
    IEncryption _L337Encryption = new L337Encryption(_textEncryption);
    IEncryption _CharShiftEncryption = new CharShiftEncryption(_textEncryption);


        if (L337Toggle.isOn == true)
        {
            output.text = _L337Encryption.Encrypt();
        }
        else if (CharShiftToggle.isOn == true)
    {
        output.text = _CharShiftEncryption.Encrypt();
    }
}


public interface IEncryption
{
    string Encrypt();
}

public class TextEncryption : IEncryption
{
    private string originalString;

    public TextEncryption(string original)
    {
        originalString = original;
    }
    public string Encrypt()
    {
        Debug.Log("Encrypting Text");
        return originalString;
    }
}

public class L337Encryption : IEncryption
{
    private IEncryption _encryption;

    public L337Encryption(IEncryption encryption)
    {
        _encryption = encryption;
    }
    public string Encrypt()
    {
        Debug.Log("Encrypting L337 Text");
        string result = _encryption.Encrypt();
        result = result.Replace('a', '4').Replace('b', '8').Replace('e', '3').Replace('g', '6').Replace('h', '4').Replace('l', '1')
            .Replace('o', '0').Replace('q', '9').Replace('s', '5').Replace('t', '7').Replace('A', '4').Replace('B', '8')
            .Replace('E', '3').Replace('G', '6').Replace('H', '4').Replace('L', '1')
            .Replace('O', '0').Replace('Q', '9').Replace('S', '5').Replace('T', '7'); 

        return result;
    }
}


public class CharShiftEncryption : IEncryption
{
    private IEncryption _encryption;
    public CharShiftEncryption(IEncryption encryption)
    {
        _encryption = encryption;
    }
    public string Encrypt()
    {
        Debug.Log("Encrypting Character Shift Text");
        string result = _encryption.Encrypt();
        string[] Letters=new string[] { "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" };

        for (int i=0;i<Letters.Length;i++)
        {
            if (Letters[i] == result)
            {
                result = Letters[i + 1];
          if (result == Letters[25])
         {
                result = Letters[0];
                }
            }
        }
        return result;
    }
}

我建议使用字典，而不是数组。首先创建它：

 using System.Linq;

 ...

 // {{'a', 'b'},
 //  {'b', 'c'},
 //   ...
 //  {'y', 'z'},
 //  {'z', 'a'}}
 const int range = 'z' - 'a' + 1;

 static Dictionary<char, char> s_Dict = Enumerable
   .Range('a', range) // all letters enumerated
   .Select(item => new {
      key = (char) item,
      value = (char) ('a' + (item - 'a' + 1) % range),  
    }) 
   .ToDictionary(item => item.key,
                 item => item.value);

测试：

结果：

  encrypt me, please!  
  fodszqu nf, qmfbtf!

---

一个天真的实现，没有立即使用Linq在unity中玩

using System.Collections.Generic;
using UnityEngine;

public class Encryption : MonoBehaviour {

    public string testString = "Every lower case vowel gets replaced by the 'next' one.";

    Dictionary<char, char> charMap;
    string result = "";

    void Start () {

        charMap = new Dictionary<char, char>() {
            {'a','e'},
            {'e','i'},
            {'i','o'},
            {'o','u'},
            {'u','a'}
        };
        result = "";    

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

            result += charMap.ContainsKey(testString[i]) ? charMap[testString[i]] : testString[i];
        }

        Debug.Log(result);
    }

}

---

你的if语句永远不会返回true。因为结果永远不会被设置，因为if语句永远不会返回true，所以它是一个圆。编辑：你没有得到一个错误，这是一个无限循环吗？刚刚添加了一个屏幕快照如果你通过z，正确的字母是什么？您也只检查小写字母。我知道，我要为大写字母创建另一个数组，如果索引>letters.length，那么我将设置I=0如果我希望源为用户输入，该怎么办？如果您希望源为yser输入-string source=Console.ReadLine；假设您希望console InputUnumerable在System.Linq namespaceOk的当前上下文中不存在。这很难翻译成我的代码。我只是在我的问题中添加了我程序的其余部分。我试图为我的加密对象创建一个decorator对象，就像我对L337 decorator对象所做的那样。我需要encrypt for character shift从文本加密继承。如果我不想使用测试字符串，并且我想使用用户在unity中输入的内容，该怎么办？在您的例子中，它将是_encryption.encrypt.的返回值，因此该行将为'for int I=0；i<\u Encryption.Encrypt.Length；i++？试试看，你的电脑不会爆炸如果不是的话，最糟糕的情况是你出错了，它不工作了，应该是_encryption.Encrypt.Length。还有两件事。首先，dmitry和我的上述答案的组合也适用于L337加密。第二，请勾选有助于正确回答的答案。哦，还有第三点，我对string+string的使用是次优的，并且会产生大量的垃圾，读入System.Text的StringBuilder类，这对于在运行时创建字符串更好。

  encrypt me, please!  
  fodszqu nf, qmfbtf!

using System.Collections.Generic;
using UnityEngine;

public class Encryption : MonoBehaviour {

    public string testString = "Every lower case vowel gets replaced by the 'next' one.";

    Dictionary<char, char> charMap;
    string result = "";

    void Start () {

        charMap = new Dictionary<char, char>() {
            {'a','e'},
            {'e','i'},
            {'i','o'},
            {'o','u'},
            {'u','a'}
        };
        result = "";    

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

            result += charMap.ContainsKey(testString[i]) ? charMap[testString[i]] : testString[i];
        }

        Debug.Log(result);
    }

}