関連ワード:  shared_ptr weak_ptr unique_ptr    unique_ptr shared_ptr weak_ptr c++    shared_ptr vs unique_ptr vs weak_ptr    smart pointers unique_ptr shared_ptr weak_ptr    c++ shared_ptr vs unique_ptr vs weak_ptr    shared_ptr unique_ptr weak_ptr 区别    difference between shared_ptr and unique_ptr  
結果 : shared_ptr weak_ptr unique_ptr