преобразовать число с плавающей запятой в строку (convert a floating-point number to a string)
Имя (Name)
gcvt - convert a floating-point number to a string
Синопсис (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 versions 2.12 to 2.16:
(_XOPEN_SOURCE >= 500 && ! (_POSIX_C_SOURCE >= 200112L))
|| _SVID_SOURCE
Before glibc 2.12:
_SVID_SOURCE || _XOPEN_SOURCE >= 500
Описание (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.
Возвращаемое значение (Return value)
The gcvt() function returns buf.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│gcvt() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
Стандарты (Conforming to)
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).
Смотри также (See also)
ecvt(3), fcvt(3), sprintf(3)
