C++ Program Example on Virtual Function and Runtime Polymorphism

✅ C++ Program to Demonstrate Virtual Function and Runtime Polymorphism

#include <iostream>
using namespace std;

class Base {
public:
    // Virtual function
    virtual void display() {
        cout << "Display from Base class\n";
    }
};

class Derived : public Base {
public:
    void display() {
        cout << "Display from Derived class\n";
    }
};

int main() {
    Base *ptr;      // Base class pointer
    Derived obj;    // Derived class object
    ptr = &obj;

    // Because 'display' is virtual, Derived version is called
    ptr->display(); 

    return 0;
}
  

📘 Explanation:

This program demonstrates runtime polymorphism in C++ using a virtual function.

• display() is declared as virtual inside the Base class.
• The Derived class overrides the display() function.
• A Base class pointer is used to call display() on a Derived object.
• Because of dynamic binding, the Derived version executes at runtime.

🧾 Sample Output:

Display from Derived class
  

🔑 Keywords:

C++ virtual function example, runtime polymorphism, OOPs in C++, base and derived class example, dynamic binding

📌 Hashtags:

#CPlusPlus #OOPs #VirtualFunction #RuntimePolymorphism #Programming

🔍 Search Description:

Learn how virtual functions enable runtime polymorphism in C++. This example demonstrates how a base class pointer can call a derived class function using the virtual keyword.