在C#中将单词转换为标记值

using System;

public class Program
{
    enum Token
    {
        Word,
        Number,
        Operator,
        Symbol,
        Other
    }

    public static void Main(string[] args)
    {
        string word = "Hello";

        Token token = GetToken(word);
        
        Console.WriteLine($"The token for the word '{word}' is: {token}");
    }

    public static Token GetToken(string word)
    {
        // 判断单词的类型，返回相应的标记值
        if (IsNumber(word))
        {
            return Token.Number;
        }
        else if (IsOperator(word))
        {
            return Token.Operator;
        }
        else if (IsSymbol(word))
        {
            return Token.Symbol;
        }
        else if (IsWord(word))
        {
            return Token.Word;
        }
        else
        {
            return Token.Other;
        }
    }

    public static bool IsNumber(string word)
    {
        // 判断是否为数字
        int result;
        return int.TryParse(word, out result);
    }

    public static bool IsOperator(string word)
    {
        // 判断是否为操作符
        // 自定义判断规则，例如判断是否为 +, -, *, / 等操作符
        return word == "+" || word == "-" || word == "*" || word == "/";
    }

    public static bool IsSymbol(string word)
    {
        // 判断是否为符号
        // 自定义判断规则，例如判断是否为 () {} [] 等符号
        return word == "(" || word == ")" || word == "{" || word == "}" || word == "[" || word == "]";
    }

    public static bool IsWord(string word)
    {
        // 判断是否为单词
        // 自定义判断规则，例如判断是否只包含字母
        return System.Text.RegularExpressions.Regex.IsMatch(word, @"^[a-zA-Z]+$");
    }
}