gcvt(3) [linux man page]

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)

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, 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)
                   || /* Glibc since 2.19: */ _DEFAULT_SOURCE
                   || /* Glibc versions <= 2.19: */ _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 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.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       +----------+---------------+---------+
       |Interface | Attribute     | Value   |
       +----------+---------------+---------+
       |gcvt()    | Thread safety | MT-Safe |
       +----------+---------------+---------+

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 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

                                                                    2017-09-15                                                             GCVT(3)