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97 lines
4.7 KiB
HTML
97 lines
4.7 KiB
HTML
4 years ago
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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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<!-- This manual is for GNU MPC, a library for multiple precision complex arithmetic,
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version 1.0.3 of February 2015.
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Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 INRIA
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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 no
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Invariant Sections. A copy of the license is included in the section
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entitled "GNU Free Documentation License." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Complex Comparison (GNU MPC 1.0.3)</title>
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<meta name="description" content="Complex Comparison (GNU MPC 1.0.3)">
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<meta name="keywords" content="Complex Comparison (GNU MPC 1.0.3)">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="Complex-Functions.html#Complex-Functions" rel="up" title="Complex Functions">
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<link href="Projection-_0026-Decomposing.html#Projection-_0026-Decomposing" rel="next" title="Projection & Decomposing">
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<link href="String-and-Stream-Input-and-Output.html#String-and-Stream-Input-and-Output" rel="prev" title="String and Stream Input and Output">
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</head>
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<body lang="en">
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<a name="Complex-Comparison"></a>
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<div class="header">
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<p>
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Next: <a href="Projection-_0026-Decomposing.html#Projection-_0026-Decomposing" accesskey="n" rel="next">Projection & Decomposing</a>, Previous: <a href="String-and-Stream-Input-and-Output.html#String-and-Stream-Input-and-Output" accesskey="p" rel="prev">String and Stream Input and Output</a>, Up: <a href="Complex-Functions.html#Complex-Functions" accesskey="u" rel="up">Complex Functions</a> [<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Comparison-Functions"></a>
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<h3 class="section">5.5 Comparison Functions</h3>
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<a name="index-Complex-comparisons-functions"></a>
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<a name="index-Comparison-functions"></a>
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<dl>
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<dt><a name="index-mpc_005fcmp"></a>Function: <em>int</em> <strong>mpc_cmp</strong> <em>(mpc_t <var>op1</var>, mpc_t <var>op2</var>)</em></dt>
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<dt><a name="index-mpc_005fcmp_005fsi_005fsi"></a>Function: <em>int</em> <strong>mpc_cmp_si_si</strong> <em>(mpc_t <var>op1</var>, long int <var>op2r</var>, long int <var>op2i</var>)</em></dt>
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<dt><a name="index-mpc_005fcmp_005fsi"></a>Macro: <em>int</em> <strong>mpc_cmp_si</strong> <em>(mpc_t <var>op1</var>, long int <var>op2</var>)</em></dt>
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<dd>
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<p>Compare <var>op1</var> and <var>op2</var>, where in the case of <code>mpc_cmp_si_si</code>,
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<var>op2</var> is taken to be <var>op2r</var> + i <var>op2i</var>.
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The return value <var>c</var> can be decomposed into <code>x = MPC_INEX_RE(c)</code>
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and <code>y = MPC_INEX_IM(c)</code>, such that <var>x</var> is
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positive if the real part of <var>op1</var> is greater than that of <var>op2</var>,
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zero if both real parts are equal, and negative if the real part of <var>op1</var>
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is less than that of <var>op2</var>, and likewise for <var>y</var>.
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Both <var>op1</var> and <var>op2</var> are considered to their full own precision,
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which may differ.
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It is not allowed that one of the operands has a NaN (Not-a-Number) part.
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</p>
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<p>The storage of the return value is such that equality can be simply checked
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with <code>mpc_cmp (op1, op2) == 0</code>.
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</p></dd></dl>
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</body>
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</html>
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