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Linux 2.6 - man page for gcvt (linux section 3)

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

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(), rec-
       ommending 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 3.55 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)


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