Shulou(Shulou.com)06/02 Report--

This article mainly introduces "what is C++ Virtual". In daily operation, I believe many people have doubts about what C++ Virtual is. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the doubts about "what is C++ Virtual?" Next, please follow the editor to study!

Virtual is a very important keyword in C++ OO (object-oriented mechanism) mechanism. The virtual function is because the member function adds the keyword virtual, which shows its importance.

Anyone who has studied C++ knows that the function with the Virtual keyword added to the class Base is a virtual function (for example, the function print), so the base class virtual function can be overridden by rewriting the virtual function in the derived class Derived of Base. When the pointer point of the base class Base points to the object of the derived class Derived, the call to the print function of point is actually calling the print function of Derived instead of the print function of Base. This is the embodiment of polymorphism in object-oriented.

/ /-class Base {public:Base () {} public: virtual void print () {cout

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