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insert [C++ Reference]
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<h2><a name="insert" id="insert">insert</a></h2>
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<p>
Syntax:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="co2">#include <deque></span>
iterator insert<span class="br0">(</span> iterator loc<span class="sy0">,</span> <span class="kw4">const</span> TYPE<span class="sy0">&</span> val <span class="br0">)</span><span class="sy0">;</span>
<span class="kw4">void</span> insert<span class="br0">(</span> iterator loc<span class="sy0">,</span> size_type num<span class="sy0">,</span> <span class="kw4">const</span> TYPE<span class="sy0">&</span> val <span class="br0">)</span><span class="sy0">;</span>
template<span class="sy0"><</span>typename input_iterator<span class="sy0">></span>
<span class="kw4">void</span> insert<span class="br0">(</span> iterator loc<span class="sy0">,</span> input_iterator start<span class="sy0">,</span> input_iterator end <span class="br0">)</span><span class="sy0">;</span></pre>
<p>
The insert() function either:
</p>
<ul>
<li class="level1"><div class="li"> inserts <code>val</code> before <code>loc</code>, returning an iterator to the element inserted,</div>
</li>
<li class="level1"><div class="li"> inserts <code>num</code> copies of <code>val</code> before <code>loc</code>, or</div>
</li>
<li class="level1"><div class="li"> inserts the elements from <code>start</code> to <code>end</code> before <code>loc</code>.</div>
</li>
</ul>
<p>
For example:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="co1">// Create a deque, load it with the first 10 characters of the alphabet</span>
deque<span class="sy0"><</span>char<span class="sy0">></span> alphaDeque<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">10</span><span class="sy0">;</span> i<span class="sy0">++</span> <span class="br0">)</span> <span class="br0">{</span>
<span class="kw4">static</span> <span class="kw4">const</span> <span class="kw4">char</span> letters<span class="br0">[</span><span class="br0">]</span> <span class="sy0">=</span> <span class="st0">"ABCDEFGHIJ"</span><span class="sy0">;</span>
alphaDeque.<span class="me1">push_back</span><span class="br0">(</span> letters<span class="br0">[</span>i<span class="br0">]</span> <span class="br0">)</span><span class="sy0">;</span>
<span class="br0">}</span>
<span class="co1">// Insert four C's into the deque</span>
deque<span class="sy0"><</span>char<span class="sy0">>::</span><span class="me2">iterator</span> theIterator <span class="sy0">=</span> alphaDeque.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span>
alphaDeque.<span class="me1">insert</span><span class="br0">(</span> theIterator<span class="sy0">,</span> <span class="nu0">4</span><span class="sy0">,</span> <span class="st0">'C'</span> <span class="br0">)</span><span class="sy0">;</span>
<span class="co1">// Display the deque</span>
<span class="kw1">for</span><span class="br0">(</span> theIterator <span class="sy0">=</span> alphaDeque.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span> theIterator <span class="sy0">!=</span> alphaDeque.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span> <span class="sy0">++</span>theIterator <span class="br0">)</span> <span class="br0">{</span>
<a href="http://www.opengroup.org/onlinepubs/009695399/functions/cout.html"><span class="kw3">cout</span></a> <span class="sy0"><<</span> <span class="sy0">*</span>theIterator<span class="sy0">;</span>
<span class="br0">}</span></pre>
<p>
This code would display:
</p>
<pre class="code">
CCCCABCDEFGHIJ</pre>
<p>
This next example uses several different methods to add data to a deque, and then uses the <a href="../../stl/algorithm/copy.html" class="wikilink1" title="stl:algorithm:copy">copy algorithm</a> to display the deque:
</p>
<pre class="c code c++" style="font-family:monospace;"> deque<span class="sy0"><</span>int<span class="sy0">></span> dq<span class="sy0">;</span>
dq.<span class="me1">push_back</span><span class="br0">(</span>42<span class="br0">)</span><span class="sy0">;</span>
dq.<span class="me1">push_front</span><span class="br0">(</span>1<span class="br0">)</span><span class="sy0">;</span>
dq.<span class="me1">insert</span><span class="br0">(</span> dq.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">+</span>1<span class="sy0">,</span> 2 <span class="br0">)</span><span class="sy0">;</span>
dq<span class="br0">[</span>2<span class="br0">]</span> <span class="sy0">=</span> <span class="nu0">16</span><span class="sy0">;</span>
copy<span class="br0">(</span> dq.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">,</span> dq.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">,</span> ostream_iterator<span class="sy0"><</span>int<span class="sy0">></span><span class="br0">(</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">" "</span><span class="br0">)</span> <span class="br0">)</span><span class="sy0">;</span> <span class="co1">// displays "1 2 16"</span></pre>
<p>
Related Topics: <a href="../../stl/deque/assign.html" class="wikilink1" title="stl:deque:assign">assign</a>, <a href="../../stl/deque/erase.html" class="wikilink1" title="stl:deque:erase">erase</a>, <a href="../../stl/deque/push_back.html" class="wikilink1" title="stl:deque:push_back">push_back</a>, <a href="../../stl/deque/push_front.html" class="wikilink1" title="stl:deque:push_front">push_front</a>
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