Find 3 or more repeating charaters in a string

Find 3 or more repeating charaters in a string

References

Reference NO 1

http://stackoverflow.com/questions/13193426/how-i-find-that-string-contain-a-repeating-character-more-then-6-time-in-flex

Reference NO 2

http://stackoverflow.com/questions/15193040/find-3-or-more-repeating-charaters-in-a-string

Reference NO 3

http://www.geeksforgeeks.org/given-a-string-find-its-first-non-repeating-character/

Reference NO 4

http://codereview.stackexchange.com/questions/20060/first-non-repeated-character-in-a-string-in-c

Reference NO 5

http://www.perlmonks.org/?node_id=353072

Reference NO 6

http://crackprogramming.blogspot.com/2013/02/find-start-position-of-largest-block-of.html

Reference NO 7

http://social.msdn.microsoft.com/Forums/vstudio/en-US/e667a9e8-7f31-4da8-9b60-c060e59b8471/action?threadDisplayName=how-to-find-first-nonrepeating-character-in-a-string-using-c

Reference NO 8

http://lua-users.org/wiki/PatternsTutorial