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

A. strchr( )

B. strrchr( )

C. strstr( )

D. strnset( )

Correct Answer is :

C. strstr( )

Explanation

strstr is a C standard library string function as defined in string.h. strstr() has the function signature char * strstr(const char *haystack, const char *needle); which returns a pointer to a character at the first index where needle is in haystack, or NULL if not present.