NAME
strchr, index
— locate first occurrence of a
character in a string
SYNOPSIS
#include
<string.h>
char *
strchr(const
char *s, int
c);
#include
<strings.h>
char *
index(const
char *s, int
c);
DESCRIPTION
The
strchr()
function locates the first occurrence of the character
c (converted to a char) in the string
s. The terminating NUL character is considered part of
the string. If c is
‘\0’, strchr()
locates the terminating ‘\0’.
The
index()
function is an old synonym for strchr().
RETURN VALUES
The strchr() function returns a pointer to
the located character or NULL if the character does
not appear in the string.
EXAMPLES
After the following call to strchr(),
p will point to the string "oobar":
char *p; char *s = "foobar"; p = strchr(s, 'o');
SEE ALSO
memchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3), strtok(3), wcschr(3)
STANDARDS
The strchr() function conforms to
ANSI X3.159-1989
(“ANSI C89”).
The index() function is deprecated and
shouldn't be used in new code.
HISTORY
The index() function first appeared in
Version 7 AT&T UNIX. The
strchr() function first appeared in
AT&T System III UNIX and was
reimplemented for 4.3BSD-Tahoe.