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

Conforming to

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


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

See Also

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


This page is part of release 5.04 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/.

Referenced By

ecvt(3), ecvt_r(3).

The man pages qfcvt(3) and qgcvt(3) are aliases of qecvt(3).

2016-03-15 GNU Linux Programmer's Manual