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man: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, 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 signifi-
     cant 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 specifica-
     tion 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 4.16 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)
/data/webs/external/dokuwiki/data/pages/man/gcvt.txt · Last modified: 2019/05/17 09:32 by 127.0.0.1

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