NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON |
GCVT(3) Linux Programmer's Manual GCVT(3)
gcvt - convert a floating-point number to a string
#include <stdlib.h> char *gcvt(double number, int ndigit, char *buf); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): gcvt(): Since glibc 2.12: (_XOPEN_SOURCE >= 500) ! (_POSIX_C_SOURCE >= 200112L) || /* Glibc since 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _SVID_SOURCE Before glibc 2.12: _SVID_SOURCE || _XOPEN_SOURCE >= 500
The gcvt() function converts number to a minimal length null- terminated ASCII string and stores the result in buf. It produces ndigit significant digits in either printf(3) F format or E format.
The gcvt() function returns the address of the string pointed to by buf.
For an explanation of the terms used in this section, see attributes(7). ┌──────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├──────────┼───────────────┼─────────┤ │gcvt() │ Thread safety │ MT-Safe │ └──────────┴───────────────┴─────────┘
Marked as LEGACY in POSIX.1-2001. POSIX.1-2008 removes the specification of gcvt(), recommending the use of sprintf(3) instead (though snprintf(3) may be preferable).
ecvt(3), fcvt(3), sprintf(3)
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2016-03-15 GCVT(3)
Pages that refer to this page: ecvt(3), qecvt(3)