GCVT
Section: Linux Programmer's Manual (3)
Updated: 2017-09-15
Page Index
NAME
gcvt - convert a floating-point number to a string
SYNOPSIS
#include <stdlib.h>
char *gcvt(double number, int ndigit, char *buf);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
gcvt():
-
- Since glibc 2.12:
-
(_XOPEN_SOURCE >= 500) ! (_POSIX_C_SOURCE >= 200112L)
|| /* Glibc since 2.19: */ _DEFAULT_SOURCE
|| /* Glibc versions <= 2.19: */ _SVID_SOURCE
- Before glibc 2.12:
-
_SVID_SOURCE || _XOPEN_SOURCE >= 500
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
buf.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
gcvt()
| Thread safety | MT-Safe
|
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 5.10 of the Linux
man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
https://www.kernel.org/doc/man-pages/.