What are some examples of polymorphism in C++?

What are some examples of polymorphism in C++?

Polymorphism in C++ allows methods to do different things based on the object it is acting upon. A common example is using virtual functions.

Can you give me a code example of polymorphism?

Sure! Here's a simple example:

class Animal {
public:
    virtual void sound() { std::cout << "Animal sound"; }
};

class Dog : public Animal {
public:
    void sound() override { std::cout << "Bark"; }
};

class Cat : public Animal {
public:
    void sound() override { std::cout << "Meow"; }
};

void makeSound(Animal* a) {
    a->sound();
}

int main() {
    Dog dog;
    Cat cat;
    makeSound(&dog); // Outputs: Bark
    makeSound(&cat); // Outputs: Meow
}

This demonstrates how different classes can implement the same method in their own way.

What is the difference between compile-time and run-time polymorphism?

Compile-time polymorphism is achieved through function overloading and operator overloading, while run-time polymorphism is achieved through inheritance and virtual functions.

Are there any real-world applications of polymorphism?

Yes, polymorphism is widely used in frameworks and libraries, allowing for flexible and reusable code. For example, GUI frameworks use polymorphism to handle different types of user interface elements.