腾飞FLY

  You want to add behavior or state to individual objects at run-time. Inheritance is not feasible because it is static and applies to an entire class.Typical Example as follows, with the typic...

  Functions that use pointers or references to base classes must be able to use objects of derived classes without knowing it. Robert C. Martin氏为我们总结了在面向对象的设计（OOD）中应该遵循的原则，这些原则被称为“Principles...