Man page - gcvt(3)

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Manual

gcvt

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
STANDARDS
HISTORY
SEE ALSO

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).

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STANDARDS

None.

HISTORY

Marked as LEGACY in POSIX.1-2001. POSIX.1-2008 removed it, recommending the use of sprintf (3) instead (though snprintf (3) may be preferable).

SEE ALSO

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