NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | CONFORMING TO | SEE ALSO | COLOPHON

The Linux Programming Interface

GCVT(3)                       Linux Programmer's Manual                       GCVT(3)

NAME         top

       gcvt - convert a floating-point number to a string

SYNOPSIS         top

       #include <stdlib.h>

       char *gcvt(double number, size_t ndigit, char *buf);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       gcvt():
           Since glibc 2.12:
               _SVID_SOURCE ||
                   (_XOPEN_SOURCE >= 500 ||
                       _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED) &&
                   !(_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600)
           Before glibc 2.12:
               _SVID_SOURCE || _XOPEN_SOURCE >= 500 || _XOPEN_SOURCE &&
               _XOPEN_SOURCE_EXTENDED

DESCRIPTION         top

       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         top

       The gcvt() function returns the address of the string pointed to by buf.

CONFORMING TO         top

       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         top

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

COLOPHON         top

       This page is part of release 3.32 of the Linux man-pages project.  A
       description of the project, and information about reporting bugs, can be found
       at http://www.kernel.org/doc/man-pages/.

                                      2010-09-20                              GCVT(3)

HTML rendering created 2010-12-03 by Michael Kerrisk, author of The Linux Programming Interface