string array question

Question

Hi..I hv one question abt c# string program suppose i have one string like str='aabcbbcdccd' & i want to print the string as like this a2b3c4d2. any one can help me how to write the above program

Vulpes · Answer

Here's one way to do it: using System; using System.Text; using System.Collections.Generic; class Program { static void Main() { string str=aabcbbcdccd; var sd = new SortedDictionary (); foreach(char c in str) { if (sd.ContainsKey(c)) { sd[c]++; } else { sd.Add(c 1); } } var sb = new StringBuilder(); foreach(char c in sd.Keys) { sb.Append(c); sb.Append(sd[c].ToString()); } string str2 = sb.ToString(); Console.WriteLine(str2); // a2b3c4d2 Console.ReadKey(); } }