GCVT

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
CONFORMING TO
SEE ALSO
COLOPHON

NAME

gcvt − convert a floating-point number to a string

SYNOPSIS

#include

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)
|| /bin /boot /dead.letter /dev /etc /home /initrd /lib /lib64 /lost+found /media /mnt /opt /proc /release-notes.html /release-notes.txt /root /run /sbin /srv /sys /tmp /usr /var Glibc since 2.19: bodies/ usr/ _DEFAULT_SOURCE
|| /bin /boot /dead.letter /dev /etc /home /initrd /lib /lib64 /lost+found /media /mnt /opt /proc /release-notes.html /release-notes.txt /root /run /sbin /srv /sys /tmp /usr /var Glibc versions <= 2.19: bodies/ usr/ _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).

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).

SEE ALSO

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

COLOPHON

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