gcvt
Section: C Library Functions (3)
Updated: 2023-02-05
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NAME
gcvt - convert a floating-point number to a string
LIBRARY
Standard C library
(libc, -lc)
SYNOPSIS
#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 2.17
(_XOPEN_SOURCE >= 500 && ! (_POSIX_C_SOURCE >= 200809L))
|| /* glibc >= 2.20 */ _DEFAULT_SOURCE
|| /* glibc <= 2.19 */ _SVID_SOURCE
glibc 2.12 to glibc 2.16:
(_XOPEN_SOURCE >= 500 && ! (_POSIX_C_SOURCE >= 200112L))
|| _SVID_SOURCE
Before glibc 2.12:
_SVID_SOURCE || _XOPEN_SOURCE >= 500
DESCRIPTION
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.
RETURN VALUE
The
gcvt()
function returns
buf.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
gcvt()
| Thread safety | MT-Safe
|
STANDARDS
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).
SEE ALSO
ecvt(3),
fcvt(3),
sprintf(3)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ATTRIBUTES
-
- STANDARDS
-
- SEE ALSO
-
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