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Which of the following function is used to find the first occurrence of a given string in another string?

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Which of the following function is used to find the first occurrence of a given string in another string?
  • Astrchr()
  • Bstrrchr()
  • Cstrstr()
  • Dstrnset()
  • ENone of these
Correct answer: C

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strstr()

The function strstr() Finds the first occurrence of a substring in another string
Declaration: char *strstr(const char *s1, const char *s2);

Return Value:
On success, strstr returns a pointer to the element in s1 where s2 begins (points to s2 in s1).
On error (if s2 does not occur in s1), strstr returns null.