Tag:Derived Class

  • C + + object oriented: C + + interface (abstract class)

    Time:2021-3-16

    Interfaces describe the behavior and function of a class without the need to complete a specific implementation of the class.   The C + + interface usesabstract classData abstraction is a concept that separates implementation details from related data. If at least one function in a class is declared as a pure virtual function, the […]

  • Const_ cast,static_ cast, dynamic_ cast, reinterpret_ cast

    Time:2021-3-4

    const_ Cast: used to convert const variables to non const variables int n = 5; int *k1 = const_ Cast (& n); // pointer *k1 = 1; int &k2 = const_ Cast (n); // reference k2 = 2; const int a = 10; int* b = const_cast(&a); *B = 11; // the attribute of pointer […]

  • C + + basic knowledge conclusion

    Time:2021-2-26

    On constant member functions: Const double function() and double function() const; many people may confuse them, but they are not exactly the same. The former is to ensure that the returned value is the constant (Note: variable cannot be changed), the latter is to require that your function does not involve changing the value of […]

  • Study day 50

    Time:2021-1-27

    C++ Derived classes Classes are not isolated from each other. There are parent classes and subclasses, that is, inheritance classes Parent class is also called base class and superclass Subclasses are also called derived classes Inheritance is one of the core of object-oriented programming The order in which constructors are called when derived class objects […]

  • Study day 54

    Time:2021-1-12

    C++ Subclass object model Derived classes contain multiple components(multiple sub objects) the contents of multiple objects need not be related It contains the member variables defined by the subclass itself, the sub objects of the member functions The subclass inherits the subobjects of the base class, and the subobjects contain the member variables and member […]

  • Study day 58

    Time:2020-12-30

    C++ Inherited constructors A class only inherits the constructor, default, copy and move constructors of its direct base class (parent class), which cannot be directly inherited Using makes a name visible in the current scope class a { public: a(int a1,int a2,int a3){} }; class b :public a { public: Using a:: A // inherits […]

  • C + + exception capture and handling

    Time:2020-12-29

    In reading projects developed by others, you may often see code that uses exceptions, and you may rarely see code that uses exception handling. When to use exception and when not to use exception? After learning the basic concept and grammar of exception, we will explain it later. (1) Exception throw and catch statements //1. […]

  • Members of class

    Time:2020-5-27

    1、 Members of the sub category As we mentioned before, the class is roughly divided into two areas, as shown in the following figure: Each area can be divided into: class A: company_ Name = ‘old boy education’ ා static variable (static field) Wei IPhone = ‘1353333xxxx’ ා private static variable (private static field) def […]

  • Java Foundation: three characteristics of object-oriented

    Time:2020-5-20

    Object-oriented has three characteristics: inheritance, encapsulation and polymorphism. (1) Inheritance: inheritance is a hierarchical model of linking classes, and it allows and encourages class reuse. It provides a way to explicitly express commonality. A new class of an object can be derived from an existing class. This process is called class inheritance. The new class […]

  • Net C reflection technology

    Time:2020-5-16

    The word reflexive sounds like a bull, doesn’t it? Well, it’s true that reflection is a more advanced feature, which should only be used by devs with a solid language foundation. By doing some reflection, we can improve the program‘s flexibility, scalabilityCoupling degree.   This is reflected for dynamic runtime loading, as opposed to static […]

  • C# Object-Oriented–Brief Introduction

    Time:2019-9-6

    First, C# provides complete support for Object Oriented Programming; classes describe the types of objects, and the process of creating objects is also called Instantiation for specific instances of objects; usually, new operators are used to create objects: new MyType(); Where () actually represents an instance of a class by calling its default constructor; _C# […]

  • Virtual Method and Polymorphism

    Time:2019-6-8

    class Program { static void Main(string[] args) { //Dog dog = new Dog(); Pet dog = new Dog (“DD”); // Create an instance of the base class Pet pointing to the derived class Dog //dog.Name = “DD”; Dog. Speak (); // Here is the call to the virtual method Speak () of the Pet class, […]