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<HTML><!-- -- Copyright (c) 1996-1999 -- Silicon Graphics Computer Systems, Inc. -- -- Permission to use, copy, modify, distribute and sell this software -- and its documentation for any purpose is hereby granted without fee, -- provided that the above copyright notice appears in all copies and -- that both that copyright notice and this permission notice appear -- in supporting documentation. Silicon Graphics makes no -- representations about the suitability of this software for any -- purpose. It is provided "as is" without express or implied warranty. -- -- Copyright (c) 1994 -- Hewlett-Packard Company -- -- Permission to use, copy, modify, distribute and sell this software -- and its documentation for any purpose is hereby granted without fee, -- provided that the above copyright notice appears in all copies and -- that both that copyright notice and this permission notice appear -- in supporting documentation. Hewlett-Packard Company makes no -- representations about the suitability of this software for any -- purpose. It is provided "as is" without express or implied warranty. -- --><Head><Title>swap_ranges</Title><!-- Generated by htmldoc --></HEAD><BODY TEXT="#000000" LINK="#006600" ALINK="#003300" VLINK="#7C7F87" BGCOLOR="#FFFFFF"><A HREF="/"><IMG SRC="/images/common/sgilogo_small.gif" ALT="SGI Logo" WIDTH="80" HEIGHT="72" BORDER="0"></A><P><!--end header--><BR Clear><H1>swap_ranges</H1><Table CellPadding=0 CellSpacing=0 width=100%><TR><TD Align=left><Img src = "algorithms.gif" Alt="" WIDTH = "194" HEIGHT = "38" ></TD><TD Align=right><Img src = "function.gif" Alt="" WIDTH = "194" HEIGHT = "38" ></TD></TR><TR><TD Align=left VAlign=top><b>Category</b>: algorithms</TD><TD Align=right VAlign=top><b>Component type</b>: function</TD></TR></Table><h3>Prototype</h3><pre>template <class <A href="ForwardIterator.html">ForwardIterator</A>1, class <A href="ForwardIterator.html">ForwardIterator</A>2>ForwardIterator2 swap_ranges(ForwardIterator1 first1, ForwardIterator1 last1, ForwardIterator2 first2);</pre> <h3>Description</h3><tt>Swap_ranges</tt> swaps each of the elements in the range<tt>[first1, last1)</tt> with the corresponding element in the range<tt>[first2, first2 + (last1 - first1))</tt>. That is, for each integer <tt>n</tt>such that <tt>0 <= n < (last1 - first1)</tt>, it swaps <tt>*(first1 + n)</tt>and <tt>*(first2 + n)</tt>. The return value is <tt>first2 + (last1 - first1)</tt>.<h3>Definition</h3>Defined in the standard header <A href="algorithm">algorithm</A>, and in the nonstandardbackward-compatibility header <A href="algo.h">algo.h</A>.<h3>Requirements on types</h3><tt>ForwardIterator1</tt> and <tt>ForwardIterator2</tt> must both be models of<A href="ForwardIterator.html">Forward Iterator</A>. The value types of <tt>ForwardIterator1</tt> and <tt>ForwardIterator2</tt> must be convertible to each other.<h3>Preconditions</h3><UL><LI><tt>[first1, last1)</tt> is a valid range.<LI><tt>[first2, first2 + (last1 - first1))</tt> is a valid range.<LI>The two ranges <tt>[first1, last1)</tt> and <tt>[first2, first2 + (last1 - first1))</tt> do not overlap.</UL><h3>Complexity</h3>Linear. Exactly <tt>last1 - first1</tt> swaps are performed.<h3>Example</h3><pre><A href="Vector.html">vector</A><int> V1, V2;V1.push_back(1);V1.push_back(2);V2.push_back(3);V2.push_back(4);assert(V1[0] == 1 && V1[1] == 2 && V2[0] == 3 && V2[1] == 4);swap_ranges(V1.begin(), V1.end(), V2.begin());assert(V1[0] == 3 && V1[1] == 4 && V2[0] == 1 && V2[1] == 2);</pre><h3>Notes</h3><h3>See also</h3><tt><A href="swap.html">swap</A></tt>, <tt><A href="iter_swap.html">iter_swap</A></tt>.<!-- start footer --><!-- Footer Begins --><STYLE TYPE="text/css"><!--TD.footer, TD.footer A{ font-family: Arial, helvetica, sans-serif; font-size: 8pt;}A.home {font-family: Arial, helvetica, sans-serif;}--></STYLE><P><A CLASS="home" HREF="index.html">STL Home</A><P><TABLE WIDTH="600" CELLPADDING="0" CELLPADDING="0" BORDER="0"> <TR> <TD ALIGN="RIGHT" CLASS="footer"><A HREF="/company_info/terms.html" TARGET="_top">terms of use</A> | <A HREF="/company_info/privacy.html" TARGET="_top">privacy policy</A></TD> <TD ALIGN="CENTER" CLASS="footer"> | </TD> <TD ALIGN="LEFT" CLASS="footer"><A HREF="/cgi-bin/feedback/" TARGET="_top">contact us</A></TD> </TR><TR> <TD ALIGN="RIGHT" CLASS="footer">Copyright © 1993-2003 Silicon Graphics, Inc. All rights reserved.</TD> <TD ALIGN="CENTER" CLASS="footer"> | </TD> <TD ALIGN="LEFT" CLASS="footer"><A HREF="/company_info/trademarks/" TARGET="_top">Trademark Information</A></TD> </TR></TABLE><!-- Footer Ends --><!-- end footer --><P></BODY></HTML> ⌨️ 快捷键说明
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