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   gcvt    ( 3 )

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Имя (Name)

gcvt - convert a floating-point number to a string

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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

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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.

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Возвращаемое значение (Return value)

The gcvt() function returns buf.

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Атрибуты (Attributes)

For an explanation of the terms used in this section, see
       attributes(7).

       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │Interface                             │ Attribute     │ Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │gcvt()                                │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

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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).

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Смотри также (See also)

ecvt(3), fcvt(3), sprintf(3)

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