摩斯密码(Morse code) C#实现

摩尔斯电码（又译为摩斯密码，Morse code）是一种时通时断的信号代码，通过不同的排列顺序来表达不同的英文字母、数字和标点符号。它由美国人艾尔菲德·维尔于1837年发明。 摩尔斯电码是一种早期的数字化通信形式，但是它不同于现代只使用零和一两种状态的二进制代码，它的代码包括五种： 点、划、点和划之间的停顿、每个字符间短的停顿（在点和划之间）、每个词之间中等的停顿以及句子之间长的停顿。

注意只可以使用英文/数字等ASCII编码127界限符中的内容并

不支持Unicode不过你可以自己修改一部分用于支持Unicode

示例代码：

public static class MorseCode // 摩尔斯电码(星际穿越)  
   
{  
   
   
    private static volatile string[,] CodeTable =   
   
    {  
   
        {"A",".-"},  
   
        {"B","-..."},  
   
        {"C","-.-."},  
   
        {"D","-.."},  
   
        {"E","."},  
   
        {"E","..-.."},  
   
        {"F","..-."},  
   
        {"G","--."},  
   
        {"H","...."},  
   
        {"I",".."},  
   
        {"J",".---"},  
   
        {"K","-.-"},  
   
        {"L",".-.."},  
   
        {"M","--"},  
   
        {"N","-."},  
   
        {"O","---"},  
   
        {"P",".--."},  
   
        {"Q","--.-"},  
   
        {"R",".-."},  
   
        {"S","..."},  
   
        {"T","-"},  
   
        {"U","..-"},  
   
        {"V","...-"},  
   
        {"W",".--"},  
   
        {"X","-..-"},  
   
        {"Y","-.--"},  
   
        {"Z","--.."},  
   
        {"0","-----"},  
   
        {"1",".----"},  
   
        {"2","..---"},  
   
        {"3","...--"},  
   
        {"4","....-"},  
   
        {"5","....."},  
   
        {"6","-...."},  
   
        {"7","--..."},  
   
        {"8","---.."},  
   
        {"9","----."},  
   
        {".",".-.-.-"},  
   
        {",","--..--"},  
   
        {":","---..."},  
   
        {"?","..--.."},  
   
        {"\'",".----."},  
   
        {"-","-....-"},  
   
        {"/","-..-."},  
   
        {"(","-.--."},  
   
        {")","-.--.-"},  
   
        {"\"",".-..-."},  
   
        {"=","-...-"},  
   
        {"+",".-.-."},  
   
        {"*","-..-"},  
   
        {"@",".--.-."},  
   
        {"{UNDERSTOOD}","...-."},  
   
        {"{ERROR}","........"},  
   
        {"{INVITATION TO TRANSMIT}","-.-"},  
   
        {"{WAIT}",".-..."},  
   
        {"{END OF WORK}","...-.-"},  
   
        {"{STARTING SIGNAL}","-.-.-"},  
   
        {" ","\u2423"}  
   
    };  
   
   
   
   
    public static string Enc(string str)  
   
    {  
   
        int i;  
   
        string ret = string.Empty;  
   
        if (str != null && (str = str.ToUpper()).Length > 0)  
   
            foreach (char asc in str)  
   
                if ((i = Find(asc.ToString(), 0)) > -1)  
   
                    ret += " " + CodeTable[i, 1];  
   
        return ret;  
   
    }  
   
   
   
   
    public static string Dec(string str)  
   
    {  
   
        int i;  
   
        string[] splits;  
   
        string ret = string.Empty;  
   
        if (str != null && (splits = str.Split(' ')).Length > 0)  
   
        {  
   
            foreach (string split in splits)  
   
                if ((i = Find(split, 1)) > -1)  
   
                    ret += CodeTable[i, 0];  
   
            return ret;  
   
        }  
   
        return "{#}";  
   
    }  
   
   
   
   
    private static int Find(string str, int cols)  
   
    {  
   
        int i = 0, len = CodeTable.Length / 2; // len / rank  
   
        while (i < len)  
   
        {  
   
            if (CodeTable[i, cols] == str)  
   
                return i;  
   
            i++;  
   
        };  
   
        return -1;  
   
    }  
   
}

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使用代码:

string encry = MorseCode.Enc("China"); // 把China换成摩尔斯电码  
string decry = MorseCode.Dec(encry); //把encry换成明文形式

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