句子中的单词数?(C#控制台应用程序) [英] Number of Words in a Sentence?(C# Console App)

问题描述

Hi all. i wanna write c# console app that compute " Number of Words in a Sentence"
and i write this code but it's a big problem that if number of "Space" in between sentence more than one the program output is Wrong.

using System;
namespace Test
{
    class Program
    {
        static void Main()
        {
            string st1 = "  this is a test    ";
            // First character
            char firstChar = 'a';
            int counter = 0;
            int indexfirstChar = 0;
            char lastChar = 'l';
            int indexLastChar = 0;
            for (int i = 0; i < st1.Length; i++)
            {
                if (char.IsLetter(st1[i]) || char.IsDigit(st1[i]))
                {
                    firstChar = st1[i];
                    indexfirstChar = i;
                    break;
                }
            }
            // latest character 
            for (int i = st1.Length - 1; i >= 0; i--)
            {
                if (char.IsLetter(st1[i]) || char.IsDigit(st1[i]))
                {
                    lastChar = st1[i];
                    indexLastChar = i;
                    break;
                }
            }
          
            for (int i = indexfirstChar; i < indexLastChar + 1; i++)
            {
                if (st1[i].ToString() == " ")
                    counter++;
            }
            Console.WriteLine(" Number of Word:" + counter + 1);
        }
    }
}

推荐答案

您可以使用以下代码计算单词数:

You can use this code to count the number of words:

using System;
namespace Test {
public class Program
{
   public void Main()
   {
    string st1 = "  this is a test   ";
    char[] seperator = new char[] { ' ' };
    int numberOfWords = st1.Split(seperator,StringSplitOptions.RemoveEmptyEntries).Length + 1;
    Console.WriteLine("Number of words: {0}", numberOfWords);
   }
}
}

希望对您有所帮助.

Hope this helps.

为什么不尝试简单的方法?

Why not try it the simple way?

string source = "This is a sentence, that I want to check     - no, really, I do!";
string[] parts = source.Split(new char[] { ' ', '.', '!', '?' }, StringSplitOptions.RemoveEmptyEntries);

它可能需要一些调整，但基本上可以完成您想要的操作.

It may need a little tweaking, but it will basically do what you want.

Quote:

(int i = indexfirstChar; i< indexLastChar +1; i ++)
{
如果(st1​​ [i] .ToString()==")
counter ++;
}

for (int i = indexfirstChar; i < indexLastChar + 1; i++)
{
if (st1[i].ToString() == " ")
counter++;
}

更改为:

Change to:

bool newspace = false;
for (int i = indexfirstChar; i < indexLastChar + 1; i++)
{
    if (st1[i].ToString() == " ")
    {
      if (! newspace )
      {
         counter++;
         newspace = true;
      }
    }
    else
    {
       if ( newspace )
       {
          newspace = false;
       }
    }
 }

顺便说一句，我想您应该在结果中添加1(我们实际上是在计算空白序列的出现).

BTW I suppose you should add 1 to the result (we''re actually counting blank sequences occurrences).

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