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.
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