GCVT
Section: Linux Programmer's Manual (3)
Updated: 2010-09-20
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NAME
gcvt - convert a floating-point number to a string
SYNOPSIS
#include <stdlib.h>
char *gcvt(double number, size_t ndigit, char *buf);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
gcvt():
-
- Since glibc 2.12:
-
_SVID_SOURCE ||
(_XOPEN_SOURCE >= 500 ||
_XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED) &&
!(_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600)
- Before glibc 2.12:
-
_SVID_SOURCE || _XOPEN_SOURCE >= 500 ||
_XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
DESCRIPTION
The
gcvt()
function converts
number to a minimal length null-terminated
ASCII string and stores the result in
buf.
It produces
ndigit significant digits in either
printf(3)
F format or E format.
RETURN VALUE
The
gcvt()
function returns the address of the string pointed to
by
buf.
CONFORMING TO
Marked as LEGACY in POSIX.1-2001.
POSIX.1-2008 removes the specification of
gcvt(),
recommending the use of
sprintf(3)
instead (though
snprintf(3)
may be preferable).
SEE ALSO
ecvt(3),
fcvt(3),
sprintf(3)
COLOPHON
This page is part of release 3.35 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://man7.org/linux/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- CONFORMING TO
-
- SEE ALSO
-
- COLOPHON
-
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