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<HTML><HEAD><TITLE>20.1 Overview</TITLE></HEAD><BODY><A HREF="ug1.htm"><IMG SRC="images/banner.gif"></A><BR><A HREF="com_8038.htm"><IMG SRC="images/prev.gif"></A><A HREF="booktoc1.htm"><IMG SRC="images/toc.gif"></A><A HREF="tindex1.htm"><IMG SRC="images/tindex.gif"></A><A HREF="cre_7274.htm"><IMG SRC="images/next.gif"></A><BR><STRONG>Click on the banner to return to the user guide home page.</STRONG><H2>20.1 Overview</H2><A NAME="idx215"><!></A><P>The class <A HREF="../stdlibcr/com_8038.htm"><B><I>complex</I></B></A> is a template class, used to create objects for representing and manipulating complex numbers. The operations defined on complex numbers allow them to be freely intermixed with the other numeric types available in the C++ language, thereby permitting numeric software to be easily and naturally expressed.</P><A NAME="20.1.1"><H3>20.1.1 Include Files</H3></A><P>Programs that use complex numbers must include the <SAMP>complex</SAMP> header file.</P><PRE> # include <complex></PRE><HR><A HREF="com_8038.htm"><IMG SRC="images/prev.gif"></A> <A HREF="booktoc1.htm"><IMG SRC="images/toc.gif"></A><A HREF="tindex1.htm"><IMG SRC="images/tindex.gif"></A><A HREF="cre_7274.htm"><IMG SRC="images/next.gif"></A><P>©Copyright 1996, Rogue Wave Software, Inc.</P></BODY></HTML>?? 快捷鍵說明
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