Trk::AlMat Node1 Trk::AlMat # m_ncol # m_nrow # m_nele # m_ptr_data # m_transpose + AlMat() + AlMat() + AlMat() + ~AlMat() + operator[]() + operator[]() + nrow() + ncol() + Print() + operator=() and 25 more... # elem() - copy() - copy() Node2 std::string Node2->Node1 #m_pathbin #m_pathtxt Node3 std::basic_string< char > Node3->Node2