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count-letter-frequencies
//Rextester.Program.Main is the entry point for your code. Don't change it. //Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5 using System; using System.Collections.Generic; using System.Linq; using System.Text.RegularExpressions; using System.IO; namespace Rextester { public class Program { public static void Main(string[] args) { //Your code goes here int[] c = new int[(int)char.MaxValue]; // 2. // Read entire text file. string s = "43565456555465489hjgfhgjghjghjghsdllllffssafg5567435438704545"; // 3. // Iterate over each character. foreach (char t in s) { // Increment table. c[(int)t]++; } // 4. // Write all letters found. for (int i = 0; i < (int)char.MaxValue; i++) { if (c[i] > 0 && char.IsLetterOrDigit((char)i)) { Console.WriteLine("Letter: {0} Frequency: {1}", (char)i, c[i]); } } } } }
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