creal(3p) — Справочная страница Linux

CREAL(3P)               POSIX Programmer's Manual              CREAL(3P)

ПРОЛОГ

       This manual page is part of the POSIX Programmer's Manual.  The
       Linux implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior),
       or the interface may not be implemented on Linux.

ИМЯ

       creal, crealf, creall — complex real functions

СИНТАКСИС

       #include <complex.h>

       double creal(double complex z);
       float crealf(float complex z);
       long double creall(long double complex z);

ОПИСАНИЕ

       The functionality described on this reference page is aligned
       with the ISO C standard. Any conflict between the requirements
       described here and the ISO C standard is unintentional. This
       volume of POSIX.1‐2017 defers to the ISO C standard.

       These functions shall compute the real part of z.

ЗНАЧЕНИЕ, ВОЗВРАЩАЕМОЕ ФУНКЦИЕЙ

       These functions shall return the real part value.

ОШИБКИ

       No errors are defined.

       The following sections are informative.

ПРИМЕРЫ

       None.

ИСПОЛЬЗОВАНИЕ В ПРИЛОЖЕНИЯХ

       For a variable z of type complex:

           z == creal(z) + cimag(z)*I

ОБЪЯСНЕНИЕ

       None.

НАПРАВЛЕНИЯ РАЗВИТИЯ

       None.

СМОТРИТЕ ТАКЖЕ

       carg(3p), cimag(3p), conj(3p), cproj(3p)

       The Base Definitions volume of POSIX.1‐2017, complex.h(0p)

АВТОРСКИЕ ПРАВА

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any
       discrepancy between this version and the original IEEE and The
       Open Group Standard, the original IEEE and The Open Group
       Standard is the referee document. The original Standard can be
       obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page
       are most likely to have been introduced during the conversion of
       the source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group               2017                         CREAL(3P)

Страницы, которые ссылаются на эту страницу: complex.h(0p), cimag(3p), conj(3p), cproj(3p)