#include <iostream> 
using namespace std; 

class Base 
{ 
    public: 

}; 

class Derived : public Base 
{ 
    public: 
        Derived() 
        { 
            cout << "Derived created" << endl; 
        } 

        Derived(const Derived &rhs) 
        { 
            cout << "Derived created by deep copy" << endl; 
        } 

        ~Derived() 
        { 
            cout << "Derived destroyed" << endl; 
        } 
}; 

int main() 
{ 
    Derived s1; 

    Derived s2 = s1; // Compiler invokes "copy constructor" 
    // Type of s1 and s2 are concrete to compiler 

    // How can we create Derived1 or Derived2 object 
    // from pointer (reference) to Base class pointing Derived object? 

    return 0; 
}