What is polymorphism in C++ and how does it work?

What is polymorphism in C++ and how does it work?

Polymorphism in C++ allows methods to do different things based on the object that it is acting upon. It can be achieved through function overloading and operator overloading.

Can you explain the difference between compile-time and run-time polymorphism?

Sure! Compile-time polymorphism is resolved during compilation, typically through function overloading. Run-time polymorphism is resolved during execution, often using virtual functions.

What are virtual functions and how do they relate to polymorphism?

Virtual functions are member functions in a base class that you expect to override in derived classes. They enable run-time polymorphism by allowing the program to determine which function to call at runtime.

Can you give me a code example demonstrating polymorphism?

Certainly! Here's a simple example:

class Base {
public:
    virtual void show() { cout << "Base class"; }
};

class Derived : public Base {
public:
    void show() override { cout << "Derived class"; }
};

Base* b = new Derived();
b->show(); // Outputs: Derived class

This demonstrates run-time polymorphism.