GCVT(3) Linux Programmer's Manual GCVT(3)NAMEgcvt - 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 signifi‐
cant 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.
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 specifica‐
tion of gcvt(), recommending the use of sprintf(3) instead (though
snprintf(3) may be preferable).
SEE ALSOecvt(3), fcvt(3), sprintf(3)COLOPHON
This page is part of release 4.14 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/.
2017-09-15 GCVT(3)
