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Language/Type: C string
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Author: Cynthia Lee (on 2018/02/03)

Write a function named count_occurrences that accepts a string to match (as char *), and a string to search (as a char *), and returns the number of different locations where the match string can be found in the string to search. For example, the call count_occurrences("ab", "abstract baabaa baobab") returns 3. If either string is NULL or empty, return 0.

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This is a function exercise. Write a C function as described. Do not write a complete program; just the function(s) above.

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