<map>

Visual Studio 2015

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The latest version of this topic can be found at <map>.

Defines the container template classes map and multimap and their supporting templates.

Syntax

#include <map>

Map version	Multimap version	Description
operator!= (map)	operator!= (multimap)	Tests if the map or multimap object on the left side of the operator is not equal to the map or multimap object on the right side.
operator< (map)	operator< (multimap)	Tests if the map or multimap object on the left side of the operator is less than the map or multimap object on the right side.
operator<= (map)	operator<= (multimap)	Tests if the map or multimap object on the left side of the operator is less than or equal to the map or multimap object on the right side.
operator== (map)	operator== (multimap)	Tests if the map or multimap object on the left side of the operator is equal to the map or multimap object on the right side.
operator> (map)	operator> (multimap)	Tests if the map or multimap object on the left side of the operator is greater than the map or multimap object on the right side.
operator>= (map)	operator>= (multimap)	Tests if the map or multimap object on the left side of the operator is greater than or equal to the map or multimap object on the right side.

Map version	Multimap version	Description
swap (map)	swap (multimap)	Exchanges the elements of two maps or multimaps.


value_compare Class	Provides a function object that can compare the elements of a map by comparing the values of their keys to determine their relative order in the map.
map Class	Used for the storage and retrieval of data from a collection in which the each of the elements has a unique key with which the data is automatically ordered.
multimap Class	Used for the storage and retrieval of data from a collection in which the each of the elements has a key with which the data is automatically ordered and the keys do not need to have unique values.