c# - 计算文本文件中的单词数

Question

我正在尝试计算文本文件中的单词数，即开始。

This is a test of the word count program. This is only a test. If your program works successfully, you should calculate that there are 30 words in this file.

我正在使用 StreamReader 将文件中的所有内容放入字符串中，然后使用 .Split 方法获取单个单词的数量，但在编译和运行程序时我总是得到错误的值。

using System;
using System.IO;

class WordCounter
{
    static void Main()
    {
        string inFileName = null;

        Console.WriteLine("Enter the name of the file to process:");
        inFileName = Console.ReadLine();

        StreamReader sr = new StreamReader(inFileName);

        int counter = 0;
        string delim = " ,.";
        string[] fields = null;
        string line = null;

        while(!sr.EndOfStream)
        {
            line = sr.ReadLine();
        }



        fields = line.Split(delim.ToCharArray());
        for(int i = 0; i < fields.Length; i++)
        {
            counter++;
        }
        sr.Close();
        Console.WriteLine("The word count is {0}", counter);
    }
} 

Answer 1

尽量使用正则表达式，例如:

int count = Regex.Matches(input, @"\b\w+\b").Count;