Map, set, multimap, Multiset, hash_map, hah_set, hash_multimap, hash_multiset

Differences between map, set, multimap, Multiset, hash_map, hah_set, hash_multimap, and hash_multiset

1. Differences between hash and hash

Hash is implemented using hash_table and unordered.

Br_tree is implemented and ordered without hash.

Other features are the same

One occupies a large space and one occupies a small space.

2. Differences between Multi and multi

Key values with multi can be repeated.

Duplicate values are not allowed without multi.

Multimap does not overload the [] Operator

3. Differences between map and set

MAP has both key values and real values.

Set only has key values.

Map, set, multimap, Multiset, hash_map, hah_set, hash_multimap, hash_multiset