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 *restrict decpt,
            int *restrict sign);
char *qfcvt(long double number, int ndigits, int *restrict decpt,
            int *restrict sign);
char *qgcvt(long double number, int ndigit, char *buf);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

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


Since glibc 2.19:
_DEFAULT_SOURCE
In glibc up to and including 2.19:
_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 5.13 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/.

2021-03-22 GNU