関連ワード:  how to declare a class object in c++    how to create a class object in c++    how to create a new class object in c++    how to create class object in c++ using new    how to define class object in c++    how to create a vector of class objects in c++    how to create template class object in c++    how to create a pointer to a class object in c++    how to create array of class objects in c++    how to create classes and objects in c++ with example