Where i am doing it wrong

#1
#2

Follow this appraoch
1.First check if the length of string is less than the length of the given pattern, if yes then “no such window can exist “.
2.Store the occurrence of characters of the given pattern in a hash_pat[].
3.Start matching the characters of pattern with the characters of string i.e. increment count if a character matches.
4.Check if (count == length of pattern ) this means a window is found.
5.If such window found, try to minimize it by removing extra characters from the beginning of the current window.
6.Update min_length.
7.Print the minimum length window.

#3

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