Number of Words in a Sentence?(C# Console App)

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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.

C#

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);
        }
    }
}

Posted 8-Oct-12 1:59am

AlirezaDehqani

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Thomas Daniels 8-Oct-12 8:03am

And what's the output?

AlirezaDehqani 8-Oct-12 8:15am

output is correct for this program and it's 4. but sentence be this " this is a test" output is wrong.

4 solutions

Solution 3

Your program is correct just change line to print on console:

Console.WriteLine(" Number of Word:" + (counter + 1));

In your code : counter + 1 ; 1 has been treated as string literal.

Posted 8-Oct-12 2:18am

Peeyush Pachaori

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Peeyush Pachaori 10-Oct-12 4:32am

Explanation given is correct. Can i know the reason why downvoted?

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CPallini · Accepted Answer · 2012-10-08T02:20:00

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

Change to:

C#

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;
       }
    }
 }

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

OriginalGriff · Accepted Answer · 2012-10-08T02:18:00

Why not try it the simple way?

C#

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

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

Thomas Daniels · Accepted Answer · 2012-10-08T02:17:00

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

C#

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);
   }
}
}

Hope this helps.

Number of Words in a Sentence?(C# Console App)

4 solutions

Solution 4

Solution 3

Solution 2

Solution 1

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