Self-Implementation of C++17 Any Class 1. Introduction The Any class is a standard class introduced in C++17, included in the header file , with the core functionality of storing a single piece of data of any type, while the type does not need to be determined at compile time. It implements type erasure, making it … Read more
In C++, interfaces are typically implemented through abstract classes. An abstract class is a class that cannot be instantiated and contains at least one pure virtual function. A pure virtual function is a virtual function declared in a base class without an implementation, forcing derived classes to override it. This mechanism allows us to define … Read more
Object-Oriented Programming (OOP) is a programming paradigm that uses “objects” to design software and applications. Let’s delve into understanding Object-Oriented Programming in Python. 1. Core Concepts of Object-Oriented Programming 1. Class and Object Class: A blueprint or template for objects, defining the properties and methods of the object. Object: An instance of a class, having … Read more
The Mechanism of Virtual Inheritance Virtual inheritance is designed to solve the diamond inheritance problem. Here is a code example: class Furniture { public: int _weight; }; class Sofa : virtual public Furniture { public: int _a; }; class Bed : virtual public Furniture { public: int _b; }; class SofaBed : public Sofa, public … Read more
1. The Essence and Core Concepts of Polymorphism Polymorphism is one of the three pillars of object-oriented programming, allowing the same interface to represent different underlying forms (data types or behaviors). C++ implements polymorphism through two mechanisms: 1. Compile-time Polymorphism (Static Polymorphism): Achieved through function overloading, operator overloading, and templates 2. Run-time Polymorphism (Dynamic Polymorphism): … Read more
VC++ 6.0 is a visual C++ integrated development environment launched by Microsoft, primarily used for Windows program development. VC++ 6.0 supports polymorphism through the overriding of virtual functions, making it easier to build flexible object-oriented programs. So, how do you override virtual functions in VC++ 6.0? Below, I will introduce the steps to override virtual … Read more
1. The Essence and Core Concepts of Overloading In C++, overloading allows the definition of multiple entities (functions or operators) with the same name within the same scope, achieving polymorphic behavior through different parameter lists. This mechanism is divided into two main categories: 1. Function Overloading: Multiple functions with the same name in the same … Read more
What is Object-Oriented Programming (OOP) Object: Girlfriend, Boyfriend, Entity (an individual of a class of things) Type: Classification, Category The four main characteristics of Object-Oriented Programming: Abstraction: Abstracting things, abstracting properties, abstracting behaviors Properties: Common characteristics of a class of things, e.g., humans: age, name, ID, gender… Behaviors: Common behaviors of a class of things, … Read more
In the previous article, we shared about bufferevent | Embedded Network Communication Buffer Layer, where bufferevent utilizes the Strategy Pattern design, implementing polymorphic behavior through <span>struct bufferevent_ops</span>: Different types of bufferevent (such as socket, filter, SSL) share the same set of interfaces, calling their respective implementation functions through the <span>be_ops</span> pointer. This article will share … Read more
1. The Essence of Polymorphism and the Structure of Virtual Function Tables Polymorphism is a core feature of object-oriented programming, achieved through base class pointers/references calling overridden functions in derived classes to implement runtime dynamic binding. For example, in an animal sound system: cpp class Animal { public: virtual void speak() const { cout << … Read more