関連ワード:  how to define a map in c++    how to declare a map in c++    how to define a hash map in c++    how to define a unordered_map in c++    how to declare a unordered_map in c++    how to declare a hash map in c++    how to declare a map in cpp    how to declare and initialize a map in c++    how to declare unordered_map in c++    how to declare iterator for map in c++