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`int similar_text`

(string first, string second, double [percent]);This calculates the similarity between two strings as described in Oliver [1993]. Note that this implementation does not use a stack as in Oliver's pseudo code, but recursive calls which may or may not speed up the whole process. Note also that the complexity of this algorithm is O(N**3) where N is the length of the longest string.

By passing a reference as third argument, **similar_text()**
will calculate the similarity in percent for you. It returns
the number of matching chars in both strings.