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NAME

       gcvt - convert a floating-point number to a string

SYNOPSIS

       #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

       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 the address of the string pointed to by buf.

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

       This page is part of release 3.35 of the Linux man-pages project.  A  description  of  the
       project,  and information about reporting bugs, can be found at http://man7.org/linux/man-
       pages/.

                                            2010-09-20                                    GCVT(3)