関連ワード:  how to declare map in c++    how to initialize map in c++    how to create map in c++    how to define map in c++    how to initialize map in c++ with 0    how to declare unordered_map in c++    how to declare hash map in c++    how to declare ordered map in c++    how to declare iterator for map in c++    how to declare an empty map in c++