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This article mainly explains "the implementation and principle of C++ polymorphism and the example analysis of abstract class". The content of the explanation in this article is simple and clear, and it is easy to learn and understand. let's study and learn the implementation and principle of C++ polymorphism and the case analysis of abstract class.

The concept of polymorphism

Polymorphism: literally, it is a variety of forms of things. In the language of C++, it means that different objects to complete the same behavior will have different effects.

Virtual function

Virtual functions: class member functions modified by the virtual keyword are called virtual functions.

Example demonstration: take a look at the code, where the BuyTicket member function is modified by the virtual keyword

Class Person {public: / / virtual function virtual void BuyTicket () {cout

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