define base class and derived class

C + + base class and derived class conversionsIn public inheritance, in private inheritance and protection inheritance, only public inheritance can preserve the characteristics of the base class, it retains all members of the base class except

4.5 Assignment compatibility relationship between a base class and a derived class objectUnder certain conditions, type conversions can be made between different types of data, such as the ability to assign integer data to a double type

Object-Oriented Programming-Overview, definition of base classes and derived classes Introduction: Object-Oriented programming is based on three basic concepts: data abstraction, inheritance, and dynamic binding. In C ++,Data abstraction using

Object-Oriented Programming -- define basic classes and derived classes [continued] IV,VirtualAnd other member functions Function calls in C ++ do not use dynamic binding by default. To trigger dynamic binding, two conditions must be met: 1) only

LeeLin blog (1) When the base class does not have its own constructor, the default bar of the derived class uses the constructor of the base class.(2) When the base class has a self-compiled constructor, you must add a constructor without parameters

(1) When the base class does not have its own constructor, the default bar of the derived class uses the constructor of the base class.(2) When the base class has a self-compiled constructor, you must add a constructor without parameters to the base

As an object-oriented program design, inheritance is a very important feature, the core idea of object-oriented programming (object-oriented programming, OOP) is data abstraction, inheritance and dynamic binding. With the use of data abstraction, we

I. Purpose of introducing inheritance 1. code reuse The Inheritance and derivation mechanisms of classes enable programmers to get new classes by adding a small amount of code or modifying a small amount of code on the basis of existing classes

There is an assignment-compatible relationship between the base class and the derived class object, because the derived class contains members that inherit from the base class, in the following respects, the required friend can refer to the only

Only a public derived class is a true subtype of the base class, and it inherits the functionality of the base class completely. There is an assignment-compatible relationship between the base class and the derived class object, because the derived