vptr

Understanding the Underlying Principles of Polymorphism in C++

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Polymorphism is divided into compile-time polymorphism and runtime polymorphism. Can you explain this in detail? Compile-time Polymorphism (Static Binding) Compile-time polymorphism, also known as static binding or early binding, is when the function to be called is determined during the compilation phase. Implementation Method: Mainly achieved through function overloading and templates. Principle: The compiler will … Read more

C++ Virtual Function Pointers: Exploring the Object Model Under Multiple Inheritance

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C++ Virtual Function Pointers: Exploring the Object Model Under Multiple Inheritance

During the learning process of C++, we are often taught that each object containing virtual functions has a virtual function pointer (vptr) that points to a virtual function table (vtable). This simplified understanding is completely correct in the context of single inheritance, but it obscures an important truth in the C++ object model: in multiple … Read more