DOKK / manpages / debian 11 / manpages-dev / qecvt.3.en
QECVT(3) Linux Programmer's Manual QECVT(3)

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

#include <stdlib.h>

char *qecvt(long double number, int ndigits, int *decpt, int *sign);

char *qfcvt(long double number, int ndigits, int *decpt, int *sign);

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

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

qecvt(), qfcvt(), qgcvt(): _SVID_SOURCE

The functions qecvt(), qfcvt(), and qgcvt() are identical to ecvt(3), fcvt(3), and gcvt(3) respectively, except that they use a long double argument number. See ecvt(3) and gcvt(3).

For an explanation of the terms used in this section, see attributes(7).

Interface Attribute Value
qecvt () Thread safety MT-Unsafe race:qecvt
qfcvt () Thread safety MT-Unsafe race:qfcvt
qgcvt () Thread safety MT-Safe

SVr4. Not seen in most common UNIX implementations, but occurs in SunOS. Supported by glibc.

These functions are obsolete. Instead, snprintf(3) is recommended.

ecvt(3), ecvt_r(3), gcvt(3), sprintf(3)

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/.

2016-03-15 GNU