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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>iota</Title><!-- Generated by htmldoc --></HEAD><BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b" ALINK="#ff0000"> <IMG SRC="CorpID.gif" ALT="SGI" HEIGHT="43" WIDTH="151"> <!--end header--><BR Clear><H1>iota</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 ForwardIterator, class T>void iota(ForwardIterator first, ForwardIterator last, T value);</pre> <h3>Description</h3><tt>Iota</tt> assigns sequentially increasing values to a range. That is,it assigns <tt>value</tt> to <tt>*first</tt>, <tt>value + 1</tt> to <tt>*(first + 1)</tt>and so on. In general, each iterator <tt>i</tt> in the range <tt>[first, last)</tt>is assigned <tt>value + (i - first)</tt>. <A href="#1">[1]</A><h3>Definition</h3>Defined in the standard header <A href="numeric">numeric</A>, and in the nonstandardbackward-compatibility header <A href="algo.h">algo.h</A>. This function is an SGIextension; it is not part of the C++ standard.<h3>Requirements on types</h3><UL><LI><tt>ForwardIterator</tt> is a model of <A href="ForwardIterator.html">Forward Iterator</A>.<LI><tt>ForwardIterator</tt> is mutable.<LI><tt>T</tt> is <A href="Assignable.html">Assignable</A>.<LI>If <tt>x</tt> is an object of type <tt>T</tt>, then <tt>x++</tt> is defined.<LI><tt>T</tt> is convertible to <tt>ForwardIterator</tt>'s value type.</UL><h3>Preconditions</h3><UL><LI><tt>[first, last)</tt> is a valid range.</UL><h3>Complexity</h3>Linear. Exactly <tt>last - first</tt> assignments.<h3>Example</h3><pre>int main(){ vector<int> V(10); iota(V.begin(), V.end(), 7); copy(V.begin(), V.end(), ostream_iterator<int>(cout, " ")); cout << endl; }</pre><h3>Notes</h3><P><A name="1">[1]</A>The name <tt>iota</tt> is taken from the programming language APL.<h3>See also</h3><tt><A href="fill.html">fill</A></tt>, <tt><A href="generate.html">generate</A></tt>, <tt><A href="partial_sum.html">partial_sum</A></tt><!--start footer--> <HR SIZE="6"><A href="http://www.sgi.com/"><IMG SRC="surf.gif" HEIGHT="54" WIDTH="54" ALT="[Silicon Surf]"></A><A HREF="index.html"><IMG SRC="stl_home.gif" HEIGHT="54" WIDTH="54" ALT="[STL Home]"></A><BR><FONT SIZE="-2"><A href="http://www.sgi.com/Misc/sgi_info.html" TARGET="_top">Copyright © 1999 Silicon Graphics, Inc.</A> All Rights Reserved.</FONT><FONT SIZE="-3"><a href="http://www.sgi.com/Misc/external.list.html" TARGET="_top">TrademarkInformation</A></FONT><P></BODY></HTML> ⌨️ 快捷键说明
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