String Counter

Question

I wanna Create a String incrementer Like a to b aa to ab etc

Vulpes · Answer

OK, then try instead: using System; class Program { static void Main() { string[] samples = {"a", "aa", "aaa", "aaaa", "z", "zz", "zzz", "zzzz"}; foreach(string s in samples) { string t = IncrementString(s); Console.WriteLine(t); } Console.ReadKey(); } static string IncrementString(string s) { // if s is invalid return an empty string, say if (String.IsNullOrEmpty(s)) return ""; int len = s.Length; // the string should only contain lower case letters for(int i = 0; i { if (s[i] 'z') return ""; } // check if it contains all z's bool allZ = true; for(int i = 0; i { if (s[i] != 'z') { allZ = false; break; } } if (allZ) return new string('a', len + 1); int multiplier = 1; int code = 0; for (int i = len - 1; i >= 0; i--) { code += (s[i] - 97) * multiplier; multiplier *= 26; } code++; char[] chars = new char[len]; for(int i = len - 1; i >= 0; i--) { chars[i] = (char)(code % 26 + 97); code /= 26; } return new string(chars); } }

Mittal Sejpal · Answer

No but i want the format i.e z - aa zz- aaa

Vulpes · Answer

Try the following: using System; class Program { static void Main() { string[] samples = {"a", "aa", "aaa", "aaaa", "z", "ad", "bcd", "zxxy"}; foreach(string s in samples) { string t = IncrementString(s); Console.WriteLine(t); } Console.ReadKey(); } static string IncrementString(string s) { // if s is invalid return an empty string, say if (String.IsNullOrEmpty(s)) return ""; int len = s.Length; // the string should only contain lower case letters for(int i = 0; i { if (s[i] 'z') return ""; } int multiplier = 1; int code = 0; for (int i = len - 1; i >= 0; i--) { code += (s[i] - 97) * multiplier; multiplier *= 26; } code++; char[] chars = new char[len]; for(int i = len - 1; i >= 0; i--) { chars[i] = (char)(code % 26 + 97); code /= 26; } return new string(chars); } } Note that when you get to "z", "zz" etc. the method as it stands will return the next string as "a", "aa" etc.

String Counter

Answers (3)