Home > Backend Development > C++ > What is the Purpose of the \'override\' Keyword in C Virtual Method Overriding?

What is the Purpose of the \'override\' Keyword in C Virtual Method Overriding?

Patricia Arquette
Release: 2024-10-31 08:41:30
Original
281 people have browsed it

What is the Purpose of the 'override' Keyword in C   Virtual Method Overriding?

Virtual Method Overriding in C

In object-oriented programming, polymorphism allows subclasses to override base class methods and provide their own implementations. In C , the override keyword plays a crucial role in this process.

What Does 'override' Do?

The override keyword has two main purposes:

  • Declares Method as Override: It explicitly states that the method is intended to override a virtual method in the base class. This helps clarify the programmer's intent and facilitates code comprehension.
  • Type-Checking: It enables the compiler to verify that the overridden method's signature matches that of the base class method. This ensures that virtual method contracts are maintained and reduces errors.

Example of Override

Consider the following C code:

<code class="cpp">class Base {
public:
    virtual int foo(float x) = 0;
};

class Derived : public Base {
public:
    int foo(float x) override {
        // Derived class implementation of foo
    }
};</code>
Copy after login

In this example, the foo method in the Derived class overrides the abstract method in the Base class. The override keyword ensures that the compiler checks that the foo method's signature matches the base class method's signature. This helps prevent errors such as adding new arguments or changing the return type of the overridden method, which can break the virtual method contract.

The above is the detailed content of What is the Purpose of the \'override\' Keyword in C Virtual Method Overriding?. For more information, please follow other related articles on the PHP Chinese website!

source:php.cn
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
Latest Articles by Author
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template