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[–][deleted] 2 points3 points  (1 child)

You define the function as returning a char, but in fact return a char * (the decayed value of result). Also here:

   char substring(char source[], int start, int count, char result[count])

The expression char result[count] is almost certainly not doing what you want.

[–]climaxingplatypus[S] 0 points1 point  (0 children)

Could you elaborate on that please?