/* Stub implementation of (obsolete) index(). *//*@deftypefn Supplemental char* index (char *@var{s}, int @var{c})Returns a pointer to the first occurrence of the character @var{c} inthe string @var{s}, or @code{NULL} if not found. The use of @code{index} isdeprecated in new programs in favor of @code{strchr}.@end deftypefn*/extern char * strchr(const char *, int);char *index (const char *s, int c){return strchr (s, c);}