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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Chapter 12.  Numerics</title><meta name="generator" content="DocBook XSL-NS Stylesheets V1.76.1"/><meta name="keywords" content="&#10;      ISO C++&#10;    , &#10;      library&#10;    "/><link rel="home" href="../spine.html" title="The GNU C++ Library"/><link rel="up" href="bk01pt02.html" title="Part II.  Standard Contents"/><link rel="prev" href="algorithms.html" title="Chapter 11.  Algorithms"/><link rel="next" href="generalized_numeric_operations.html" title="Generalized Operations"/></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 12. 
  Numerics
  
</th></tr><tr><td align="left"><a accesskey="p" href="algorithms.html">Prev</a> </td><th width="60%" align="center">Part II. 
    Standard Contents
  </th><td align="right"> <a accesskey="n" href="generalized_numeric_operations.html">Next</a></td></tr></table><hr/></div><div class="chapter" title="Chapter 12.  Numerics"><div class="titlepage"><div><div><h2 class="title"><a id="std.numerics"/>Chapter 12. 
  Numerics
  <a id="id480125" class="indexterm"/>
</h2></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl><dt><span class="section"><a href="numerics.html#std.numerics.complex">Complex</a></span></dt><dd><dl><dt><span class="section"><a href="numerics.html#numerics.complex.processing">complex Processing</a></span></dt></dl></dd><dt><span class="section"><a href="generalized_numeric_operations.html">Generalized Operations</a></span></dt><dt><span class="section"><a href="numerics_and_c.html">Interacting with C</a></span></dt><dd><dl><dt><span class="section"><a href="numerics_and_c.html#numerics.c.array">Numerics vs. Arrays</a></span></dt><dt><span class="section"><a href="numerics_and_c.html#numerics.c.c99">C99</a></span></dt></dl></dd></dl></div><div class="section" title="Complex"><div class="titlepage"><div><div><h2 class="title"><a id="std.numerics.complex"/>Complex</h2></div></div></div><p>
  </p><div class="section" title="complex Processing"><div class="titlepage"><div><div><h3 class="title"><a id="numerics.complex.processing"/>complex Processing</h3></div></div></div><p>
    </p><p>Using <code class="code">complex&lt;&gt;</code> becomes even more comple- er, sorry,
      <span class="emphasis"><em>complicated</em></span>, with the not-quite-gratuitously-incompatible
      addition of complex types to the C language.  David Tribble has
      compiled a list of C++98 and C99 conflict points; his description of
      C's new type versus those of C++ and how to get them playing together
      nicely is
<a class="link" href="http://david.tribble.com/text/cdiffs.htm#C99-complex">here</a>.
   </p><p><code class="code">complex&lt;&gt;</code> is intended to be instantiated with a
      floating-point type.  As long as you meet that and some other basic
      requirements, then the resulting instantiation has all of the usual
      math operators defined, as well as definitions of <code class="code">op&lt;&lt;</code>
      and <code class="code">op&gt;&gt;</code> that work with iostreams: <code class="code">op&lt;&lt;</code>
      prints <code class="code">(u,v)</code> and <code class="code">op&gt;&gt;</code> can read <code class="code">u</code>,
      <code class="code">(u)</code>, and <code class="code">(u,v)</code>.
   </p></div></div></div><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td align="left"><a accesskey="p" href="algorithms.html">Prev</a> </td><td align="center"><a accesskey="u" href="bk01pt02.html">Up</a></td><td align="right"> <a accesskey="n" href="generalized_numeric_operations.html">Next</a></td></tr><tr><td align="left" valign="top">Chapter 11. 
  Algorithms
  
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