計算文本文件中單詞的數量

Question

我正在嘗試從文本文件中計算單詞的數量，即此數字以開始計算。

這是對字數統計程序的測試。這只是一個測試。如果您的 程序成功運行，則應計算此文件中有30個 單詞。

我使用的StreamReader把一切都從文件轉換成字符串，然後使用.Split方法得到的個別單詞的數量，但我不斷收到錯誤的值當我編譯和運行程序。

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

一對夫婦的提示。

1. 如果你只有句子「嗨」，你會輸出什麼？
2. 您的計數器計算是：從0到fields.Length，增量計數器。 fields.Length和你的計數器有什麼關係？

Answer 2

這應該爲你工作：

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); 
} 

}

Answer 3

你可能得到一次性的錯誤，嘗試這樣的事情

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

沒有必要當您可以直接獲取數字時迭代數組以計算元素

Answer 4

嘗試使用正則表達式，例如：

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

Answer 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; 

     } 


    } 
}