How do you print duplicate characters from a string?

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How do you print duplicate characters from a string?

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Algorithm: Let the input string be “geeks for geeks”
1: Construct a character count array from the input string.

count[‘e’] = 4
count[‘g’] = 2
count[‘k’] = 2
……

Algorithm: Let the input string be �geeks for geeks�
1: Construct a character count array from the input string.

count[�e�] = 4
count[�g�] = 2
count[�k�] = 2
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