使用C#sortedList类(可自动排序类)统计文件中单词频率
/** * sortedList类可以对存进去的对象进行默认的排序，即其内的元素是按顺序排放的。 * 该测试程序，对文件中的单词进行简单的统计然后排序输出。 */using System;using System.Collections;using System.Linq;using System.Text;using System.IO;namespace WorldCount{ class Program { static void Main( string[] args ) { try { StreamReader sr = new StreamReader ( "word.txt" ); //创建输入流 SortedList sortedlist = new SortedList ( );//创建sortelist对象，该对象可以自动排序 char[] delimiter = new char[] { '~', '`', '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', '=', ',', ' ', '>', '<', '?', '/', '\\' }; string line; int count = 0; line = sr.ReadLine ( ); while ( line != null ) { count++; string[] temp = line.Split ( delimiter ); for ( int i = 0; i < temp.Length; i++ ) { if ( !sortedlist.ContainsKey ( temp ) ) //检测该list中是否有该字符 { sortedlist.Add ( temp, 1 ); //如果数组中没有该单词加进去 } else { int index = sortedlist.IndexOfKey ( temp ); //取得指定键的索引//如果有则更改单词的次数 int value = (int)sortedlist.GetByIndex ( index );//取得指定索引的值 value++; sortedlist.SetByIndex ( index, value ); } } line = sr.ReadLine ( ); } sr.Close ( ); Console.Write(count); StreamWriter sw = new StreamWriter ( "result.txt" );//打开输出流 for ( int i = 0; i < sortedlist.Count; i++ ) { string temp = (string)sortedlist.GetKey ( i ); if ( temp == null || temp.Equals ( "" ) ) continue; else { sw.WriteLine ( "{0} {1} ", sortedlist.GetKey ( i ), sortedlist.GetByIndex ( i ) ); } } sw.Close ( ); } catch ( Exception e ) { Console.WriteLine ( "Can not read!" ); Console.WriteLine ( e.Message ); } Console.ReadKey ( ); } }}
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