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max_element [C++ Reference]
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<h2><a name="max_element" id="max_element">max_element</a></h2>
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<p>
Syntax:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="co2">#include <algorithm></span>
forward_iterator max_element<span class="br0">(</span> forward_iterator start<span class="sy0">,</span> forward_iterator end <span class="br0">)</span><span class="sy0">;</span>
forward_iterator max_element<span class="br0">(</span> forward_iterator start<span class="sy0">,</span> forward_iterator end<span class="sy0">,</span> BinPred p <span class="br0">)</span><span class="sy0">;</span></pre>
<p>
The max_element() function returns an iterator to the largest element in the
range [start,end).
</p>
<p>
If the binary predicate p is given, then it will be used instead of the <
operator to determine the largest element.
</p>
<p>
For example, the following code uses the max_element() function to determine
the largest integer in an array and the largest character in a vector of
characters:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="kw4">int</span> array<span class="br0">[</span><span class="br0">]</span> <span class="sy0">=</span> <span class="br0">{</span> 3<span class="sy0">,</span> 1<span class="sy0">,</span> 4<span class="sy0">,</span> 1<span class="sy0">,</span> 5<span class="sy0">,</span> 9 <span class="br0">}</span><span class="sy0">;</span>
<span class="kw4">unsigned</span> <span class="kw4">int</span> array_size <span class="sy0">=</span> <span class="kw4">sizeof</span><span class="br0">(</span>array<span class="br0">)</span> <span class="sy0">/</span> <span class="kw4">sizeof</span><span class="br0">(</span>array<span class="br0">[</span>0<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">"Max element in array is "</span> <span class="sy0"><<</span> <span class="sy0">*</span>max_element<span class="br0">(</span>array<span class="sy0">,</span> array<span class="sy0">+</span>array_size<span class="br0">)</span> <span class="sy0"><<</span> endl<span class="sy0">;</span>
vector<span class="sy0"><</span>char<span class="sy0">></span> v<span class="sy0">;</span>
v.<span class="me1">push_back</span><span class="br0">(</span><span class="st0">'a'</span><span class="br0">)</span><span class="sy0">;</span> v.<span class="me1">push_back</span><span class="br0">(</span><span class="st0">'b'</span><span class="br0">)</span><span class="sy0">;</span> v.<span class="me1">push_back</span><span class="br0">(</span><span class="st0">'c'</span><span class="br0">)</span><span class="sy0">;</span> v.<span class="me1">push_back</span><span class="br0">(</span><span class="st0">'d'</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">"Max element in the vector v is "</span> <span class="sy0"><<</span> <span class="sy0">*</span>max_element<span class="br0">(</span>v.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">,</span> v.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> <span class="sy0"><<</span> endl<span class="sy0">;</span></pre>
<p>
When run, the above code displays this output:
</p>
<pre class="code">
Max element in array is 9
Max element in the vector v is d</pre>
<p>
Related Topics: <a href="../../stl/algorithm/max.html" class="wikilink1" title="stl:algorithm:max">max</a>, <a href="../../stl/algorithm/min.html" class="wikilink1" title="stl:algorithm:min">min</a>, <a href="../../stl/algorithm/min_element.html" class="wikilink1" title="stl:algorithm:min_element">min_element</a>
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