A virtual function is a member function that you expect to be overridden in derived classes. Virtual functions ensure that the correct function is called for an object regardless of the pointer type.
C++ Virtual Functions and Polymorphism
Implement dynamic runtime dispatch and abstract interface contracts.
Key Takeaways: C++ Virtual Functions and Polymorphism
Mastering C++ Virtual Functions and Polymorphism helps you write clean and reliable C++ code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.
C++ Virtual Functions and Polymorphism Code Example
C++#include <iostream>
class Animal {
public:
virtual void speak() const { std::cout << "Generic sound\n"; }
virtual ~Animal() = default;
};
class Dog : public Animal {
public:
void speak() const override { std::cout << "Woof!\n"; }
};
int main() {
Animal* a = new Dog();
a->speak();
delete a;
return 0;
}Output
Woof!
Run this example on your own computer. The "Get Started" lesson shows how to set it up.
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