<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"
lang="en" dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>
size [C++ Reference]
</title>
<meta name="generator" content="DokuWiki Release 2009-12-25c "Lemming"" />
<meta name="robots" content="index,follow" />
<meta name="date" content="2009-08-06T06:26:26-0700" />
<meta name="keywords" content="stl,deque,size" />
<link rel="search" type="application/opensearchdescription+xml" href="/wiki/lib/exe/opensearch.php" title="C++ Reference" />
<link rel="start" href="/wiki/" />
<link rel="contents" href="/wiki/stl/deque/size?do=index" title="Index" />
<link rel="alternate" type="application/rss+xml" title="Recent Changes" href="/wiki/feed.php" />
<link rel="alternate" type="application/rss+xml" title="Current Namespace" href="/wiki/feed.php?mode=list&ns=stl:deque" />
<link rel="edit" title="Edit this page" href="/wiki/stl/deque/size?do=edit" />
<link rel="alternate" type="text/html" title="Plain HTML" href="/wiki/_export/xhtml/stl/deque/size" />
<link rel="alternate" type="text/plain" title="Wiki Markup" href="/wiki/_export/raw/stl/deque/size" />
<link rel="canonical" href="http://www.cppreference.com/wiki/stl/deque/size" />
<link rel="stylesheet" media="all" type="text/css" href="/wiki/lib/exe/css.php?s=all&t=custom1&tseed=1272971091" />
<link rel="stylesheet" media="screen" type="text/css" href="/wiki/lib/exe/css.php?t=custom1&tseed=1272971091" />
<link rel="stylesheet" media="print" type="text/css" href="/wiki/lib/exe/css.php?s=print&t=custom1&tseed=1272971091" />
<script type="text/javascript" charset="utf-8" ><!--//--><![CDATA[//><!--
var NS='stl:deque';var JSINFO = {"id":"stl:deque:size","namespace":"stl:deque"};
//--><!]]></script>
<script type="text/javascript" charset="utf-8" src="/wiki/lib/exe/js.php?tseed=1272971091" ></script>
<link rel="shortcut icon" href="/wiki/lib/tpl/custom1/images/favicon.png" />
</head>
<body>
<div class="dokuwiki">
<div class="stylehead">
<div class="breadcrumbs">
<span class="bchead">You are here: </span><a href="../../start.html" title="start">C++ Reference</a> » <a href="../../stl/start.html" title="stl:start">C++ Standard Template Library</a> » <a href="../../stl/deque/start.html" title="stl:deque:start">C++ Double-ended Queues</a> » <a href="../../stl/deque/size.html" title="stl:deque:size">size</a> </div>
</div>
<div class="page">
<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-2828341-1";
urchinTracker();
</script>
<!-- wikipage start -->
<h2><a name="size" id="size">size</a></h2>
<div class="level2">
<p>
Syntax:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="co2">#include <deque></span>
size_type size<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy0">;</span></pre>
<p>
The size function returns the number of elements in the current deque.
</p>
<p>
For example:
</p>
<pre class="c code c++" style="font-family:monospace;"> deque<span class="sy0"><</span>int<span class="sy0">></span> myints<span class="sy0">;</span>
<a href="http://www.opengroup.org/onlinepubs/009695399/functions/cout.html"><span class="kw3">cout</span></a> <span class="sy0"><<</span> <span class="st0">"initial size: "</span> <span class="sy0"><<</span> myints.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span> <span class="sy0"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy0">;</span>
<span class="kw1">for</span><span class="br0">(</span> <span class="kw4">int</span> i <span class="sy0">=</span> <span class="nu0">0</span><span class="sy0">;</span> i <span class="sy0"><</span> <span class="nu0">5</span><span class="sy0">;</span> <span class="sy0">++</span>i <span class="br0">)</span> myints.<span class="me1">push_back</span><span class="br0">(</span>i<span class="br0">)</span><span class="sy0">;</span>
<a href="http://www.opengroup.org/onlinepubs/009695399/functions/cout.html"><span class="kw3">cout</span></a> <span class="sy0"><<</span> <span class="st0">"after five additions: "</span> <span class="sy0"><<</span> myints.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span> <span class="sy0"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy0">;</span>
myints.<span class="me1">insert</span><span class="br0">(</span> myints.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">,</span> 5<span class="sy0">,</span> 100 <span class="br0">)</span><span class="sy0">;</span>
<a href="http://www.opengroup.org/onlinepubs/009695399/functions/cout.html"><span class="kw3">cout</span></a> <span class="sy0"><<</span> <span class="st0">"after five insertions: "</span> <span class="sy0"><<</span> myints.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span> <span class="sy0"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy0">;</span>
myints.<span class="me1">pop_back</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span>
<a href="http://www.opengroup.org/onlinepubs/009695399/functions/cout.html"><span class="kw3">cout</span></a> <span class="sy0"><<</span> <span class="st0">"after a removal: "</span> <span class="sy0"><<</span> myints.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span> <span class="sy0"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy0">;</span></pre>
<p>
The above code produces the following output:
</p>
<pre class="code">
initial size: 0
after five additions: 5
after five insertions: 10
after a removal: 9</pre>
<p>
Related Topics: <a href="../../stl/deque/max_size.html" class="wikilink1" title="stl:deque:max_size">max_size</a>, <a href="../../stl/deque/resize.html" class="wikilink1" title="stl:deque:resize">resize</a>
</p>
</div>
<!-- wikipage stop -->
</div>
<div class="clearer"> </div>
<div class="stylefoot">
<div class="meta">
<div class="user">
</div>
<!--
<div class="doc">
stl/deque/size.txt · Last modified: 08/06/2009 06:26 by n-839 </div>
-->
</div>
</div></div></body>
</html>