Question

我目前正在使用C＃开发自己的编程语言，我在尝试做某事时遇到了问题。我有一部分想出了我需要读取代码并将其存储在字符串中的位置。但是，我的问题是，我试图在搜索关键字的地方使用它，并在没有关键字的情况下显示该行。例如，我想这样工作：

代码：打印Hello
显示：您好

我在使用C＃工作时遇到了麻烦。我现有的代码：

public void Run()
    {
        string uriPath;
        uriPath = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase);
        string path = new Uri(uriPath).LocalPath;
        NBasicInfo info = new NBasicInfo();
        Console.Clear();
        Console.WriteLine("Run Project");
        Console.WriteLine("=======================================");
        Console.WriteLine("Files to open: ");
        string[] filePaths = Directory.GetFiles(path + @"\NDOS\Programs\NBasic");
        for (int i = 0; i < filePaths.Length; ++i)
        {
            string _path = filePaths[i];
            Console.WriteLine(System.IO.Path.GetFileName(_path));
         }
         Console.WriteLine();
         Console.Write("Project Name (Name before .nbasic) (Do not include .nbasic): ");
         string fileName = Console.ReadLine();
         try
         {
            StreamReader contentCode = new StreamReader(path + @"\NDOS\Programs\NBasic\" + fileName + ".nbasic");
            string codeContent = contentCode.ReadToEnd();
            contentCode.Close();
            XmlSerializer xs = new XmlSerializer(typeof(NBasicInfo));
            FileStream read = new FileStream(path + @"\NDOS\Programs\NBasic\" + fileName + ".xml", FileMode.Open, FileAccess.Read, FileShare.Read);
            NBasicInfo info2 = (NBasicInfo)xs.Deserialize(read);
            info2.pname = info2.ProjectName;
            info2.aname = info2.ApplicationName;
            info2.dname = info2.DeveloperName;
            read.Close();
            Console.Clear();
            Console.WriteLine("Running " + info2.aname + "...");
            Console.WriteLine("===================================================================");
            Thread.Sleep(200);
            Console.ReadKey();
         }
         catch
         {
            Console.WriteLine("Error running code. Please check code and correct any mistakes.");
         }
    }

我需要的是搜索关键字的代码（在这种情况下＆＃39; print＆＃39;）并显示之后的字词。

谢谢你，Nicholas

Answer 1

我可以给你一个简单的答案

if(command.StartsWith("Print"))
{
  Console.WriteLine(command.Substring(6));
}

但那不是真正的世界级语言翻译

Answer 2

你说你正在开发一种新的编程语言......这里有一个超级超基本示例（为了更好地理解这种任务所需的约束），使其更易于维护并保存所有如果@Keith Nicholas提到的话，那就是嵌套：

class Program
{
    static void Main(string[] args)
    {
        PrintKeyWords.CheckForKeyWord("print hello world!!!");
        PrintKeyWords.CheckForKeyWord("specialPrint hello world!!!");
        Console.ReadLine();
    }
}

delegate void ExecuteMethod();
public static class PrintKeyWords
{

    private static string Command { get; set; }
    public static void CheckForKeyWord(string cmd)
    {

        foreach (KeyValuePair<string, ExecuteMethod> keyword in KeyWordsDict)
        {
            if (cmd.StartsWith(keyword.Key))
            {
                Command = cmd;
                KeyWordsDict[keyword.Key].Invoke();
                return;
            }
        }
            Console.WriteLine("your command is not recognized as an internal or exter
    }

    private static Dictionary<string, ExecuteMethod> _KeyWordsDict;
    private static Dictionary<string, ExecuteMethod> KeyWordsDict
    {
        get
        {
            if (_KeyWordsDict == null)
            {
                _KeyWordsDict = new Dictionary<string, ExecuteMethod>();
                _KeyWordsDict.Add("print", Print);
                _KeyWordsDict.Add("specialPrint", SpecialPrint);
                return _KeyWordsDict;
            }

            else
            {
                return _KeyWordsDict;
            }
        }
    }

    private static void Print()
    {
        Console.WriteLine(Command.Replace("print", ""));
    }

    private static void SpecialPrint()
    {
        Console.WriteLine(Command.Replace("specialPrint", "") + "*****************");
    }
}

如何搜索字符串中的关键字并在c＃中显示没有关键字的字符串？

2 个答案: