计算文本文件中的单词数

I'm trying to count the number of words from a text file, namely this, to start.

我正在尝试从文本文件中计数单词的数量，也就是这个，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.

这是一个单词计数程序的测试。这只是一个测试。如果你的程序运行成功，你应该计算这个文件中有30个字。

I am using StreamReader to put everything from the file into a string, and then use the .Split method to get the number of individual words, but I keep getting the wrong value when I compile and run the program.

我使用StreamReader将文件中的所有内容放到一个字符串中，然后使用. split方法获取单个单词的数量，但是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);
    }
}

5 个解决方案

#1

Try to use regular expression, e.g.:

尝试使用正则表达式，例如:

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

#2

this should work for you:

这应该对你有用:

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 = " ,."; //maybe some more delimiters like ?! and so on
      string[] fields = null;
      string line = null;

      while(!sr.EndOfStream)
      {
         line = sr.ReadLine();//each time you read a line you should split it into the words
         line.Trim();
         fields = line.Split(delim.ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
         counter+=fields.Length; //and just add how many of them there is
      }


      sr.Close();
      Console.WriteLine("The word count is {0}", counter);
}

}

#3

A couple hints.

一些提示。

What if you just have the sentence "hi" what would be your output?
如果你只有一句“嗨”，你的输出是什么?
Your counter calculation is: from 0 through fields.Length, increment counter. How are fields.Length and your counter related?
您的计数器计算是:从0到字段。长度,增加计数器。如何字段。长度和你的柜台相关?

#4

you're probably getting a one off error, try something like this

你可能会得到一个1的误差，试试这个

    counter = 0;
    while(!sr.EndOfStream)
    {
        line = sr.ReadLine();
        fields = line.Split(delim.ToCharArray());
        counter += field.length();
    }

there is no need to iterate over the array to count the elements when you can get the number directly

当您可以直接获得数值时，不需要对数组进行迭代以计数元素

#5

//Easy method using Linq to Count number of words in a text file
/// www.techhowdy.com
// Lyoid Lopes Centennial College 2018
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FP_WK13
{
    static class Util
    {

        public static IEnumerable<string> GetLines(string yourtextfile)
        {
            TextReader reader = new StreamReader(yourtextfile);
            string result = string.Empty;
            string line;
            while ((line = reader.ReadLine()) != null)
            {
                yield return line;
            }
            reader.Close();
        }



        // Word Count 

        public static int GetWordCount(string str)
        {         
            int words = 0;
            string s = string.Empty;
            var lines = GetLines(str);

            foreach (var item in lines)
            {
                s = item.ToString();
                words = words +  s.Split(' ').Length;

            }

            return words;

        }


    }
}

#1