WordFreq Source Code

WordFreq Example, source code file Program.cs

using System;
using System.Collections;
using System.IO;

/// <summary>
/// WordFreq Example
/// Create a frequency table of all words
/// in the input file
/// </summary>

namespace WordFreq
{
    class Program
    {
        public static void Main()
        {
            StreamReader sr;
            StreamWriter sw;
            string line = "", processedWord = "", word = "";
            string[] words = null;
            ArrayList col = new ArrayList();

// Open files
            sr = new StreamReader("../../../../cinderella.txt");
            sw = new StreamWriter("../../temp.txt");

// Part 1: Write one word per line without punctuation or
            // spaces, and converted to lower case.
            while (sr.Peek() != -1)
            {
                line = sr.ReadLine();
                words = line.Split(' ');
                for (int i = 0; i < words.GetUpperBound(0); i++)
                {
                    processedWord = words[i].Trim(
                        ' ', '.', ',', '?', '!', ';', '\t', '\"', '\'');
                    if (processedWord != "")
                    {
                        sw.WriteLine(processedWord.ToLower());
                    }
                }
            }
            sr.Close();
            sw.Close();

// Part 2: Sort words in an arraylist and show table of
            // frequencies for each word.
            sr = new StreamReader("../../temp.txt");
            sw = new StreamWriter("../../word-freq.txt");
            while (sr.Peek() != -1)
            {
                word = sr.ReadLine();
                col.Add(word);
                col.Sort();
            }

string prev = "";
            int count = 0;
            foreach(string w in col)
            {
                if (w == prev)
                {
                    count++;
                }
                else
                {
                    sw.WriteLine("{0,-12}{1,4}", prev, count);
                    prev = w;
                    count = 0;
                }
            }
            sr.Close();
            sw.Close();
        }
    }
}