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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<!-- Mirrored from cppreference.com/cppmap/index.html by HTTrack Website Copier/3.x [XR&CO'2004], Tue, 22 Jan 2008 06:22:58 GMT -->
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<head>
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"HTML Tidy for Linux/x86 (vers 1 September 2005), see www.w3.org">
<title>C++ Maps</title>
<link href="../cppreference.css" rel="stylesheet" type="text/css">
<link href="../prettify.css" type="text/css" rel="stylesheet" />
<script type="text/javascript" src="../prettify.js"></script>
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<div class="body-content">
<div class="header-box">
<a href="../index-2.html">cppreference.com</a> > <a href=
"index.html">C++ Maps</a>
</div>
<div class="name-format">
C++ Maps
</div>
<p>C++ Maps are sorted associative containers that contain unique
key/value pairs. For example, you could create a map that
associates a <a href="../cppstring/index.html">string</a> with an
integer, and then use that map to associate the number of days in
each month with the name of each month.</p>
<p><a href="all.html">Display all entries</a> for C++ Maps on one
page, or view entries individually:</p>
<table class="category-table">
<tr class="category-table-tr-2">
<td class="category-table-td"><a href=
"map_constructors.html">Map constructors &
destructors</a></td>
<td class="category-table-td">default methods to allocate, copy,
and deallocate maps</td>
</tr>
<tr class="category-table-tr-1">
<td class="category-table-td"><a href="map_operators.html">Map
operators</a></td>
<td class="category-table-td">assign, compare, and access
elements of a map</td>
</tr>
<tr class="category-table-tr-2">
<td class="category-table-td"><a href="begin.html">begin</a></td>
<td class="category-table-td">returns an iterator to the
beginning of the map</td>
</tr>
<tr class="category-table-tr-1">
<td class="category-table-td"><a href="clear.html">clear</a></td>
<td class="category-table-td">removes all elements from the
map</td>
</tr>
<tr class="category-table-tr-2">
<td class="category-table-td"><a href="count.html">count</a></td>
<td class="category-table-td">returns the number of elements
matching a certain key</td>
</tr>
<tr class="category-table-tr-1">
<td class="category-table-td"><a href="empty.html">empty</a></td>
<td class="category-table-td">true if the map has no
elements</td>
</tr>
<tr class="category-table-tr-2">
<td class="category-table-td"><a href="end.html">end</a></td>
<td class="category-table-td">returns an iterator just past the
last element of a map</td>
</tr>
<tr class="category-table-tr-1">
<td class="category-table-td"><a href=
"equal_range.html">equal_range</a></td>
<td class="category-table-td">returns iterators to the first and
just past the last elements matching a specific key</td>
</tr>
<tr class="category-table-tr-2">
<td class="category-table-td"><a href="erase.html">erase</a></td>
<td class="category-table-td">removes elements from a map</td>
</tr>
<tr class="category-table-tr-1">
<td class="category-table-td"><a href="find.html">find</a></td>
<td class="category-table-td">returns an iterator to specific
elements</td>
</tr>
<tr class="category-table-tr-2">
<td class="category-table-td"><a href=
"insert.html">insert</a></td>
<td class="category-table-td">insert items into a map</td>
</tr>
<tr class="category-table-tr-1">
<td class="category-table-td"><a href=
"key_comp.html">key_comp</a></td>
<td class="category-table-td">returns the function that compares
keys</td>
</tr>
<tr class="category-table-tr-2">
<td class="category-table-td"><a href=
"lower_bound.html">lower_bound</a></td>
<td class="category-table-td">returns an iterator to the first
element greater than or equal to a certain value</td>
</tr>
<tr class="category-table-tr-1">
<td class="category-table-td"><a href=
"max_size.html">max_size</a></td>
<td class="category-table-td">returns the maximum number of
elements that the map can hold</td>
</tr>
<tr class="category-table-tr-2">
<td class="category-table-td"><a href=
"rbegin.html">rbegin</a></td>
<td class="category-table-td">returns a <a href=
"../iterators.html">reverse_iterator</a> to the end of the
map</td>
</tr>
<tr class="category-table-tr-1">
<td class="category-table-td"><a href="rend.html">rend</a></td>
<td class="category-table-td">returns a <a href=
"../iterators.html">reverse_iterator</a> to the beginning of the
map</td>
</tr>
<tr class="category-table-tr-2">
<td class="category-table-td"><a href="size.html">size</a></td>
<td class="category-table-td">returns the number of items in the
map</td>
</tr>
<tr class="category-table-tr-1">
<td class="category-table-td"><a href="swap.html">swap</a></td>
<td class="category-table-td">swap the contents of this map with
another</td>
</tr>
<tr class="category-table-tr-2">
<td class="category-table-td"><a href=
"upper_bound.html">upper_bound</a></td>
<td class="category-table-td">returns an iterator to the first
element greater than a certain value</td>
</tr>
<tr class="category-table-tr-1">
<td class="category-table-td"><a href=
"value_comp.html">value_comp</a></td>
<td class="category-table-td">returns the function that compares
values</td>
</tr>
</table>
</div>
</td>
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