qecvt(3) Library Functions Manual qecvt(3) qecvt, qfcvt, qgcvt - C (libc, -lc) #include [[deprecated]] char *qecvt(long double number, int ndigits, int *restrict decpt, int *restrict sign); [[deprecated]] char *qfcvt(long double number, int ndigits, int *restrict decpt, int *restrict sign); [[deprecated]] char *qgcvt(long double number, int ndigit, char *buf); glibc (. feature_test_macros(7)): qecvt(), qfcvt(), qgcvt(): Since glibc 2.19: _DEFAULT_SOURCE In glibc up to and including 2.19: _SVID_SOURCE qecvt(), qfcvt() qgcvt() ecvt(3), fcvt(3) gcvt(3), , , number long double. ecvt(3) gcvt(3). attributes(7). +----------------------------+----------------------------------------------------------+--------------------------+ | | | | +----------------------------+----------------------------------------------------------+--------------------------+ |qecvt() | | MT-Unsafe race:qecvt | +----------------------------+----------------------------------------------------------+--------------------------+ |qfcvt() | | MT-Unsafe race:qfcvt | +----------------------------+----------------------------------------------------------+--------------------------+ |qgcvt() | | MT-Safe | +----------------------------+----------------------------------------------------------+--------------------------+ . SVr4, SunOS, GNU. . snprintf(3). ecvt(3), ecvt_r(3), gcvt(3), sprintf(3) () Artyom Kunyov , Azamat Hackimov , Konstantin Shvaykovskiy Yuri Kozlov ; GNU (GNU General Public License - GPL, 3 ) , - . - , , () () () . Linux man-pages 6.18 8 2026 . qecvt(3)