GCVT

Section: Linux Programmer's Manual (3)
Updated: 2021-03-22
Index Return to Main Contents
 

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 2.17
        (_XOPEN_SOURCE >= 500 && ! (_POSIX_C_SOURCE >= 200809L))
            || /* Glibc >= 2.20 */ _DEFAULT_SOURCE
            || /* Glibc <= 2.19 */ _SVID_SOURCE
    Glibc versions 2.12 to 2.16:
        (_XOPEN_SOURCE >= 500 && ! (_POSIX_C_SOURCE >= 200112L))
            || _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 significant digits in either printf(3) F format or E format.  

RETURN VALUE

The gcvt() function returns buf.  

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
gcvt() Thread safetyMT-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 5.11 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/.

 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
CONFORMING TO
SEE ALSO
COLOPHON
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Time: 06:22:48 GMT, May 09, 2021