12.2 Base Classes and derived asses 定义派生类时需指出继承方式,如未显式指出,默认为 private °单继承: class TwoDimensionalShape: public Shape Two Dim ensionalShape Three Dimensional Shape Circle Square Triangle Sphere Cube Tetrahedron 多继承: class administratorTeacher: public Teacher, public Administrator 0 2018, SEU. All rights reserved. 10© 2009, SEU. All rights reserved. © 2018, SEU. All rights reserved. 10 12.2 Base Classes and Derived Classes 定义派生类时需指出继承方式，如未显式指出，默认为private 单继承：class TwoDimensionalShape : public Shape 多继承：class AdministratorTeacher: public Teacher, public Administrator