tail head cat sleep
QR code linking to this page
Main index Section 3
Go to:
日本語 한국인 DeutschOptions

Manual Pages  — INDEX

NAME

index – locate character in string

CONTENTS

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <strings.h>

char *
index(const char *s, int c);

char *
rindex(const char *s, int c);

DESCRIPTION

The index() and rindex() functions have been deprecated in favor of strchr(3) and strrchr(3).

The index() function locates the first occurrence of c (converted to a char) in the string pointed to by s. The terminating null character is considered part of the string; therefore if c is ‘\0’, the functions locate the terminating ‘\0’.

The rindex() function is identical to index(), except it locates the last occurrence of c.

RETURN VALUES

The functions index() and rindex() return a pointer to the located character, or NULL if the character does not appear in the string.

SEE ALSO

memchr(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3), strtok(3)

HISTORY

The index() and rindex() functions appeared in AT&T v6 . Their prototypes existed previously in <string.h> before they were moved to <strings.h> for IEEE Std 1003.1-2001 ("POSIX.1") compliance. The functions are not specified by IEEE Std 1003.1-2008 ("POSIX.1").
INDEX (3) March 20, 2011
tail head cat sleep
QR code linking to this page
Main index Section 3
Go to:
日本語 한국인 DeutschOptions

Please direct any comments about this manual page service to Ben Bullock. Privacy policy.

“ To err is human...to really foul up requires the root password. ”