.\" Copyright (C) 2002 Andries Brouwer <aeb@cwi.nl>

.\"

.\" %%%LICENSE_START(VERBATIM)

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.\" manual provided the copyright notice and this permission notice are

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.\" manual under the conditions for verbatim copying, provided that the

.\" entire resulting derived work is distributed under the terms of a

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.\" manual page may be incorrect or out-of-date.  The author(s) assume no

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.\"

.\" This replaces an earlier man page written by Walter Harms

.\" <walter.harms@informatik.uni-oldenburg.de>.

.\"

.TH QECVT 3  2016-03-15 "GNU" "Linux Programmer's Manual"

.SH NAME

qecvt, qfcvt, qgcvt \- convert a floating-point number to a string

.SH SYNOPSIS

.B #include <stdlib.h>

.PP

.BI "char *qecvt(long double " number ", int " ndigits ", int *" decpt ,

.BI "int *" sign );

.PP

.BI "char *qfcvt(long double " number ", int " ndigits ", int *" decpt ,

.BI "int *" sign );

.PP

.BI "char *qgcvt(long double " number ", int " ndigit ", char *" buf );

.PP

.in -4n

Feature Test Macro Requirements for glibc (see

.BR feature_test_macros (7)):

.in

.PP

.ad l

.BR qecvt (),

.BR qfcvt (),

.BR qgcvt ():

_SVID_SOURCE

.ad b

.\" FIXME . The full FTM picture looks to have be something like the

.\" following mess:

.\"    glibc 2.20 onward

.\"        _DEFAULT_SOURCE

.\"    glibc 2.18 to glibc 2.19

.\"        _BSD_SOURCE || _SVID_SOURCE

.\"    glibc 2.10 to glibc 2.17

.\"        _SVID_SOURCE || (_XOPEN_SOURCE >= 500 ||

.\"            (_XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED) &&

.\"                ! (_POSIX_C_SOURCE >= 200809L))

.\"    Before glibc 2.10:

.\"        _SVID_SOURCE || _XOPEN_SOURCE >= 500 ||

.\"            (_XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED)

.SH DESCRIPTION

The functions

.BR qecvt (),

.BR qfcvt (),

and

.BR qgcvt ()

are identical to

.BR ecvt (3),

.BR fcvt (3),

and

.BR gcvt (3)

respectively, except that they use a

.I "long double"

argument

.IR number .

See

.BR ecvt (3)

and

.BR gcvt (3).

.SH ATTRIBUTES

For an explanation of the terms used in this section, see

.BR attributes (7).

.TS

allbox;

lb lb lb

l l l.

Interface	Attribute	Value

T{

.BR qecvt ()

T}	Thread safety	MT-Unsafe race:qecvt

T{

.BR qfcvt ()

T}	Thread safety	MT-Unsafe race:qfcvt

T{

.BR qgcvt ()

T}	Thread safety	MT-Safe

.TE

.SH CONFORMING TO

SVr4.

Not seen in most common UNIX implementations,

but occurs in SunOS.

.\" Not supported by libc4 and libc5.

Supported by glibc.

.SH NOTES

These functions are obsolete.

Instead,

.BR snprintf (3)

is recommended.

.SH SEE ALSO

.BR ecvt (3),

.BR ecvt_r (3),

.BR gcvt (3),

.BR sprintf (3)

.SH COLOPHON

This page is part of release 4.15 of the Linux

.I 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/.