145 lines
5.5 KiB
HTML
145 lines
5.5 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1999-2016 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Funding Free Software", the Front-Cover
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Texts being (a) (see below), and with the Back-Cover Texts being (b)
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development. -->
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<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>The GNU Fortran Compiler: CMPLX</title>
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<meta name="description" content="The GNU Fortran Compiler: CMPLX">
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<meta name="keywords" content="The GNU Fortran Compiler: CMPLX">
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<meta name="distribution" content="global">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures">
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<link href="CO_005fBROADCAST.html#CO_005fBROADCAST" rel="next" title="CO_BROADCAST">
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<link href="CHMOD.html#CHMOD" rel="prev" title="CHMOD">
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<style type="text/css">
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-->
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</style>
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</head>
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="CMPLX"></a>
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<div class="header">
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<p>
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Next: <a href="CO_005fBROADCAST.html#CO_005fBROADCAST" accesskey="n" rel="next">CO_BROADCAST</a>, Previous: <a href="CHMOD.html#CHMOD" accesskey="p" rel="prev">CHMOD</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="CMPLX-_002d_002d_002d-Complex-conversion-function"></a>
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<h3 class="section">9.58 <code>CMPLX</code> — Complex conversion function</h3>
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<a name="index-CMPLX"></a>
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<a name="index-complex-numbers_002c-conversion-to"></a>
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<a name="index-conversion_002c-to-complex"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p><code>CMPLX(X [, Y [, KIND]])</code> returns a complex number where <var>X</var> is converted to
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the real component. If <var>Y</var> is present it is converted to the imaginary
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component. If <var>Y</var> is not present then the imaginary component is set to
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0.0. If <var>X</var> is complex then <var>Y</var> must not be present.
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</p>
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</dd>
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<dt><em>Standard</em>:</dt>
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<dd><p>Fortran 77 and later
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</p>
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</dd>
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<dt><em>Class</em>:</dt>
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<dd><p>Elemental function
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</p>
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</dd>
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<dt><em>Syntax</em>:</dt>
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<dd><p><code>RESULT = CMPLX(X [, Y [, KIND]])</code>
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</p>
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</dd>
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<dt><em>Arguments</em>:</dt>
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<dd><table>
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<tr><td width="15%"><var>X</var></td><td width="70%">The type may be <code>INTEGER</code>, <code>REAL</code>,
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or <code>COMPLEX</code>.</td></tr>
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<tr><td width="15%"><var>Y</var></td><td width="70%">(Optional; only allowed if <var>X</var> is not
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<code>COMPLEX</code>.) May be <code>INTEGER</code> or <code>REAL</code>.</td></tr>
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<tr><td width="15%"><var>KIND</var></td><td width="70%">(Optional) An <code>INTEGER</code> initialization
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expression indicating the kind parameter of the result.</td></tr>
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</table>
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</dd>
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<dt><em>Return value</em>:</dt>
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<dd><p>The return value is of <code>COMPLEX</code> type, with a kind equal to
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<var>KIND</var> if it is specified. If <var>KIND</var> is not specified, the
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result is of the default <code>COMPLEX</code> kind, regardless of the kinds of
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<var>X</var> and <var>Y</var>.
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</p>
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</dd>
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<dt><em>Example</em>:</dt>
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<dd><div class="smallexample">
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<pre class="smallexample">program test_cmplx
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integer :: i = 42
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real :: x = 3.14
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complex :: z
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z = cmplx(i, x)
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print *, z, cmplx(x)
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end program test_cmplx
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</pre></div>
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</dd>
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<dt><em>See also</em>:</dt>
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<dd><p><a href="COMPLEX.html#COMPLEX">COMPLEX</a>
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</p></dd>
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</dl>
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</body>
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</html>
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