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QECVT(3) Linux Programmer's Manual QECVT(3) NAME qecvt, qfcvt, qgcvt - convert a floating-point number to a string SYNOPSIS #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 DESCRIPTION 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). ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ¬ββββββββββββββββ¬βββββββββββββββββββββββ βInterface β Attribute β Value β βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββΌββββββββββββββββΌβββββββββββββββββββββββ€ βqecvt() β Thread safety β MT-Unsafe race:qecvt β βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββΌββββββββββββββββΌβββββββββββββββββββββββ€ βqfcvt() β Thread safety β MT-Unsafe race:qfcvt β βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββΌββββββββββββββββΌβββββββββββββββββββββββ€ βqgcvt() β Thread safety β MT-Safe β βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ΄ββββββββββββββββ΄βββββββββββββββββββββββ CONFORMING TO SVr4. Not seen in most common UNIX implementations, but occurs in SunOS. Supported by glibc. NOTES These functions are obsolete. Instead, snprintf(3) is recommended. SEE ALSO ecvt(3), ecvt_r(3), gcvt(3), sprintf(3) GNU 2021-03-22 QECVT(3)