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extern/stdcxx/4.2.1/doc/stdlibref/fill.html
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extern/stdcxx/4.2.1/doc/stdlibref/fill.html
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<HTML>
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<HEAD>
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<TITLE>fill(), fill_n()</TITLE>
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<LINK REL=StyleSheet HREF="../rw.css" TYPE="text/css" TITLE="Apache stdcxx Stylesheet"></HEAD>
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<BODY BGCOLOR=#FFFFFF>
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<A HREF="facets.html"><IMG SRC="images/bprev.gif" WIDTH=20 HEIGHT=21 ALT="Previous file" BORDER=O></A><A HREF="noframes.html"><IMG SRC="images/btop.gif" WIDTH=56 HEIGHT=21 ALT="Top of Document" BORDER=O></A><A HREF="booktoc.html"><IMG SRC="images/btoc.gif" WIDTH=56 HEIGHT=21 ALT="Contents" BORDER=O></A><A HREF="tindex.html"><IMG SRC="images/bindex.gif" WIDTH=56 HEIGHT=21 ALT="Index page" BORDER=O></A><A HREF="find.html"><IMG SRC="images/bnext.gif" WIDTH=25 HEIGHT=21 ALT="Next file" BORDER=O></A><DIV CLASS="DOCUMENTNAME"><B>Apache C++ Standard Library Reference Guide</B></DIV>
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<H2>fill(), fill_n()</H2>
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<P><B>Library:</B> <A HREF="2-9.html">Algorithms</A></P>
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<PRE><HR><B><I>Function</I></B><HR></PRE>
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<UL>
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<LI><A HREF="#sec1">Local Index</A></LI>
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<LI><A HREF="#sec2">Summary</A></LI>
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<LI><A HREF="#sec3">Synopsis</A></LI>
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<LI><A HREF="#sec4">Description</A></LI>
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<LI><A HREF="#sec5">Complexity</A></LI>
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<LI><A HREF="#sec6">Example</A></LI>
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<LI><A HREF="#sec7">See Also</A></LI>
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<LI><A HREF="#sec8">Standards Conformance</A></LI>
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</UL>
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<A NAME="sec1"><H3>Local Index</H3></A>
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No Entries
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<A NAME="sec2"><H3>Summary</H3></A>
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<P>Algorithm that assigns the same value to the elements in a given range</P>
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<A NAME="sec3"><H3>Synopsis</H3></A>
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<PRE>#include <algorithm>
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namespace std {
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template <class ForwardIterator, class T>
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void fill(ForwardIterator start, ForwardIterator finish,
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const T& value);
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template <class OutputIterator, class Size, class T>
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void fill_n(OutputIterator start, Size n, const T& value);
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}
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</PRE>
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<A NAME="sec4"><H3>Description</H3></A>
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<P>The <SAMP>fill()</SAMP> and <SAMP><A HREF="fill.html">fill_n()</A></SAMP> algorithms are used to assign a value to the elements in a sequence. <SAMP>fill()</SAMP> assigns the value to all the elements designated by iterators in the range <SAMP>[start, finish)</SAMP>.</P>
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<P>The <SAMP><A HREF="fill.html">fill_n()</A></SAMP> algorithm assigns the value to all the elements designated by iterators in the range <SAMP>[start, start + n)</SAMP>. <SAMP>fill_n()</SAMP> assumes that all iterators in the range <SAMP>[start, start + n)</SAMP> are dereferenceable, unless <SAMP>start</SAMP> is an insert iterator.</P>
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<P>Type <SAMP>T</SAMP> must be Assignable, and <SAMP>Size</SAMP> must be convertible to an integral type.</P>
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<A NAME="sec5"><H3>Complexity</H3></A>
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<P><SAMP>fill()</SAMP> makes exactly <SAMP>finish - start</SAMP> assignments, and <SAMP><A HREF="fill.html">fill_n()</A></SAMP> makes exactly <SAMP>n</SAMP> assignments.</P>
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<A NAME="sec6"><H3>Example</H3></A>
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<UL><PRE>//
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// fill.cpp
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//
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#include <algorithm>
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#include <iostream>
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#include <vector>
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int main ()
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{
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// Typedef for convenience.
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typedef std::vector<int, std::allocator<int> > vector;
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const vector::value_type arr[] = { 1, 2, 3, 4 };
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// Set up two vectors.
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vector v1(arr, arr + sizeof arr / sizeof *arr);
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vector v2(v1.begin (), v1.end ());
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// Set up one empty vector.
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vector v3;
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// Fill all of v1 with 9.
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std::fill(v1.begin (), v1.end (), 9);
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// Fill first 3 of v2 with 7.
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std::fill_n(v2.begin (), 3, 7);
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// Use insert iterator to fill v3 with 5 11's.
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std::fill_n(std::back_inserter (v3), 5, 11);
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// Copy all three to cout.
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std::ostream_iterator<vector::value_type, char,
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std::char_traits<char> > out(std::cout, " ");
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std::copy(v1.begin (), v1.end (), out);
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std::cout << std::endl;
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std::copy(v2.begin (), v2.end (), out);
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std::cout << std::endl;
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std::copy(v3.begin (), v3.end (), out);
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std::cout << std::endl;
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// Fill cout with 3 5's.
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std::fill_n(out, 3, 5);
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std::cout << std::endl;
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return 0;
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}
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Program Output
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</PRE></UL>
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<UL><PRE>9 9 9 9
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7 7 7 4
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11 11 11 11 11
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5 5 5
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</PRE></UL>
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<A NAME="sec7"><H3>See Also</H3></A>
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<P><A HREF="algorithms.html">Algorithms</A></P>
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<A NAME="sec8"><H3>Standards Conformance</H3></A>
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<P><I>ISO/IEC 14882:1998 -- International Standard for Information Systems -- Programming Language C++, Section 25.2.5</I></P>
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<BR>
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