Home Backend Development C++ Polymorphism of function overriding and inheritance: the art of realizing flexible calls between objects

Polymorphism of function overriding and inheritance: the art of realizing flexible calls between objects

May 02, 2024 am 10:30 AM
python inherit polymorphism

Function rewriting and inherited polymorphism are two key concepts to achieve flexible object calling in OOP: Function rewriting: the derived class redefines the function of the same name in the base class, and executes the specific implementation in the derived class when called. Polymorphism of inheritance: A derived class can be used in the same way as a base class, and when a method is called through a base class reference, its implementation in the derived class is executed.

Polymorphism of function overriding and inheritance: the art of realizing flexible calls between objects

Polymorphism of function rewriting and inheritance: the art of realizing flexible calls between objects

Preface
Polymorphism of function overriding and inheritance are two important concepts in object-oriented programming (OOP). They allow objects to perform different actions according to their types, thereby achieving code flexibility and reusability.

Function rewriting
Function rewriting refers to redefining the function of the same name in the base class in the derived class. When a derived class object calls this overridden function, the specific implementation in the derived class will be executed without calling the original implementation in the base class.

Code Example:

class BaseClass:
    def do_something(self):
        print("Base class method called")

class DerivedClass(BaseClass):
    def do_something(self):
        print("Derived class method called")
Copy after login

In this example, DerivedClass overrides do_something in BaseClass method. When the DerivedClass object calls the do_something method, the overridden version in DerivedClass will be executed.

Inherited polymorphism
Inherited polymorphism means that the derived class can be used in the same way as the base class. This means that you can use a reference from the base class to refer to an object of the derived class and then call a method in the base class and that method will be executed in the derived class in a way specific to it.

Code Example:

def do_something(obj):
    obj.do_something()

base_obj = BaseClass()
derived_obj = DerivedClass()

do_something(base_obj)  # 调用基类方法
do_something(derived_obj)  # 调用派生类重写方法
Copy after login

In this example, the do_something function is called ## using a base class reference obj #do_somethingmethod. When obj refers to the BaseClass object, the base class method will be executed; when obj refers to the DerivedClass object, the derived class override will be executed. method.

Practical CaseIn an e-commerce system, you can use polymorphism to achieve flexible payment processing. You can define a base class of
PaymentMethod and create derived classes for different payment methods (e.g. credit card, PayPal). Each derived class can override the process_payment method to process payments using a specific payment gateway.

This way you can easily switch payment methods according to the needs of your application without modifying the code that uses

PaymentMethod.

Conclusion Function overriding and inherited polymorphism are powerful tools in OOP, and they enable you to implement flexible calls between objects. By understanding these concepts, you can write code that is more flexible, reusable, and maintainable.

The above is the detailed content of Polymorphism of function overriding and inheritance: the art of realizing flexible calls between objects. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP and Python: Different Paradigms Explained PHP and Python: Different Paradigms Explained Apr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

Choosing Between PHP and Python: A Guide Choosing Between PHP and Python: A Guide Apr 18, 2025 am 12:24 AM

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

Can visual studio code be used in python Can visual studio code be used in python Apr 15, 2025 pm 08:18 PM

VS Code can be used to write Python and provides many features that make it an ideal tool for developing Python applications. It allows users to: install Python extensions to get functions such as code completion, syntax highlighting, and debugging. Use the debugger to track code step by step, find and fix errors. Integrate Git for version control. Use code formatting tools to maintain code consistency. Use the Linting tool to spot potential problems ahead of time.

Can vs code run in Windows 8 Can vs code run in Windows 8 Apr 15, 2025 pm 07:24 PM

VS Code can run on Windows 8, but the experience may not be great. First make sure the system has been updated to the latest patch, then download the VS Code installation package that matches the system architecture and install it as prompted. After installation, be aware that some extensions may be incompatible with Windows 8 and need to look for alternative extensions or use newer Windows systems in a virtual machine. Install the necessary extensions to check whether they work properly. Although VS Code is feasible on Windows 8, it is recommended to upgrade to a newer Windows system for a better development experience and security.

Is the vscode extension malicious? Is the vscode extension malicious? Apr 15, 2025 pm 07:57 PM

VS Code extensions pose malicious risks, such as hiding malicious code, exploiting vulnerabilities, and masturbating as legitimate extensions. Methods to identify malicious extensions include: checking publishers, reading comments, checking code, and installing with caution. Security measures also include: security awareness, good habits, regular updates and antivirus software.

Python vs. JavaScript: The Learning Curve and Ease of Use Python vs. JavaScript: The Learning Curve and Ease of Use Apr 16, 2025 am 12:12 AM

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

PHP and Python: A Deep Dive into Their History PHP and Python: A Deep Dive into Their History Apr 18, 2025 am 12:25 AM

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

How to run programs in terminal vscode How to run programs in terminal vscode Apr 15, 2025 pm 06:42 PM

In VS Code, you can run the program in the terminal through the following steps: Prepare the code and open the integrated terminal to ensure that the code directory is consistent with the terminal working directory. Select the run command according to the programming language (such as Python's python your_file_name.py) to check whether it runs successfully and resolve errors. Use the debugger to improve debugging efficiency.

See all articles