64 lines
1.6 KiB
Groff
64 lines
1.6 KiB
Groff
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.\" $NetBSD: creal.3,v 1.3 2010/09/15 18:40:27 wiz Exp $
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.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "CREAL" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" creal
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.SH NAME
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creal, crealf \- complex real functions
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.SH SYNOPSIS
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.LP
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\fB#include <complex.h>
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.br
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.sp
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double creal(double complex\fP \fIz\fP\fB);
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.br
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float crealf(float complex\fP \fIz\fP\fB);
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.br
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long double creall(long double complex\fP \fIz\fP\fB);
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.br
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\fP
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.SH DESCRIPTION
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.LP
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These functions compute the real part of \fIz\fP.
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.SH RETURN VALUE
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.LP
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These functions return the real part value.
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.SH ERRORS
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.LP
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No errors are defined.
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.LP
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\fIThe following sections are informative.\fP
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.SH EXAMPLES
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.LP
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None.
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.SH APPLICATION USAGE
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.LP
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For a variable \fIz\fP of type \fBcomplex\fP:
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.sp
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.RS
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.nf
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\fBz == creal(z) + cimag(z)*I
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\fP
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.fi
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.RE
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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\fIcarg\fP(), \fIcimag\fP(), \fIconj\fP(), \fIcproj\fP(), the
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Base Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<complex.h>\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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