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# Virtual Functions in C++ |
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Virtual functions enable runtime polymorphism in C++, allowing derived classes to override base class behavior. When called via a base pointer/reference, the *actual object's type* determines which function is executed (dynamic dispatch). Non-virtual functions use compile-time resolution based on the pointer/reference type (static dispatch), which prevents overriding. |
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```cpp |
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// Base class with virtual function |
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class Animal { |
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public: |
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virtual void speak() { std::cout << "Generic sound"; } |
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}; |
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// Derived class override |
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class Dog : public Animal { |
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public: |
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void speak() override { std::cout << "Woof!"; } // Dynamic dispatch |
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}; |
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``` |
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Visit the following resources to learn more: |
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- [@official@C++ Virtual Functions Documentation](https://en.cppreference.com/w/cpp/language/virtual) |
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- [@article@GeeksforGeeks Virtual Functions Guide](https://www.geeksforgeeks.org/virtual-function-cpp/) |
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- [@video@Virtual Functions Explained (YouTube)](https://www.youtube.com/watch?v=oIV2KchSyGQ&ab_channel=TheCherno) |
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