linux man page for gcvt

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 sig-
       nificant 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 3.27 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)