cppreference.com > C++ Maps C++ Maps C++ Maps are sorted associative containers that contain unique key/value pairs. For example, you could create a map that associates a string with an integer, and then use that map to associate the number of days in each month with the name of each month. Display all entries for C++ Maps on one page, or view entries individually:
Map constructors & destructors | default methods to allocate, copy, and deallocate maps
Map operators | assign, compare, and access elements of a map
begin | returns an iterator to the beginning of the map
clear | removes all elements from the map
count | returns the number of elements matching a certain key
empty | true if the map has no elements
end | returns an iterator just past the last element of a map
equal_range | returns iterators to the first and just past the last elements matching a specific key
erase | removes elements from a map
find | returns an iterator to specific elements
insert | insert items into a map
key_comp | returns the function that compares keys
lower_bound | returns an iterator to the first element greater than or equal to a certain value
max_size | returns the maximum number of elements that the map can hold
rbegin | returns a reverse_iterator to the end of the map
rend | returns a reverse_iterator to the beginning of the map
size | returns the number of items in the map
swap | swap the contents of this map with another
upper_bound | returns an iterator to the first element greater than a certain value
value_comp | returns the function that compares values