index - get first occurrence of character in string

Syntax	#include <strings.h> char *index(const char *s, int c);
Description	index() searches for the first occurrence of character c in string s and returns a pointer to the located position in s if successful. The terminating null byte (\0) is also treated as a character.
Return val.	Pointer to the position of c in string s,
		if successful.
	Null pointer	if c is not contained in string s.
Notes	index() and strchr() are equivalent. Portable applications should use the strchr() function instead of index().
See also	rindex(), strchr(), strings.h.