creal(3) - NetBSD Manual Pages

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CREAL(3)                NetBSD Library Functions Manual               CREAL(3)


NAME

     creal, crealf, creall -- complex real functions


SYNOPSIS

     #include <complex.h>

     double
     creal(double complex z);

     float
     crealf(float complex z);

     long double
     creall(long double complex z);

     #include <tgmath.h>

     complex-float
     creal(complex-float z);


DESCRIPTION

     These functions compute the real part of z.


RETURN VALUES

     These functions return the real part value.


ERRORS

     No errors are defined.


APPLICATION USAGE

     For a variable z of type complex:

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


SEE ALSO

     carg(3), cimag(3), conj(3), cproj(3), IEEE Std 1003.1-2001 (``POSIX.1'')
     <complex.h>


COPYRIGHT

     Portions of this text are reprinted and reproduced in electronic form
     from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
     -- Portable Operating System Interface (POSIX), The Open Group Base Spec-
     ifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electri-
     cal 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 ref-
     eree document.  The original Standard can be obtained online at
     http://www.opengroup.org/unix/online.html .

NetBSD 10.99                  September 27, 2017                  NetBSD 10.99