Detailed explanation of C++ function inheritance: How to use the 'override' keyword?

Function inheritance in C uses the "override" keyword to indicate that the subclass function overrides the parent class function to modify the implementation. Advantages include: 1) code reuse; 2) custom behavior; 3) polymorphism.

C Detailed explanation of function inheritance: Master the "rewrite" keyword

In object-oriented programming, function inheritance refers to subclasses A class inherits the functions of the parent class and modifies its implementation. The override keyword is provided in C to clearly indicate that a subclass function overrides a parent class function.

Syntax

The syntax for overriding parent class functions in subclasses is:

class Subclass : public Superclass {
public:
    override return_type function_name(parameters) {
        // ...
    }
};

Benefits of rewriting

The benefits of rewriting functions include:

• Code reuse: Avoid repeatedly writing code with the same function.
• Customized behavior: Allow subclasses to modify specific aspects of parent class functions to suit different needs.
• Polymorphism: Polymorphism is achieved by redefining virtual functions in derived classes.

Practical case

The following code example demonstrates how to use the override keyword to rewrite a function in C:

class Animal {
public:
    virtual void speak() {
        cout << "Animal speaks" << endl;
    }
};

class Dog : public Animal {
public:
    override void speak() {
        cout << "Dog barks" << endl;
    }
};

int main() {
    Animal* animal = new Dog();
    animal->speak(); // 输出："Dog barks"
    return 0;
}

In this example, the Dog class overrides the speak() function to provide customized behavior for the Dog object.

The above is the detailed content of Detailed explanation of C++ function inheritance: How to use the 'override' keyword?. For more information, please follow other related articles on the PHP Chinese website!