関連ワード:  how to declare a hash map in c++    how to create a hash map in c++    how to define a hash map in c++    how to declare a hash table in c++    how to initialize a hash map in c++    how to create a hash table in c++    how to initialize a hash table in c++    how to define a hash table in c++    how to initialise a hashmap in c++    how to declare a map in c++