C++ Object Slicing

What is object slicing?

• Object slicing is a concept where additional attributes of a derived class object is sliced to form a base class object.
• Object slicing doesn't occur when pointers or references to objects are passed as function arguments since both the pointers are of the same size.
• Object slicing will be noticed when pass by value is done for a derived class object for a function accepting base class object.
• Object slicing could be prevented by making the base class function pure virtual there by

EXAMPLE: Demonstrate the concept of object slicing

#include <iostream>

using namespace std;



class Base {

        int data1;

        int data2;

    public:

        Base(int a, int b) {

            data1 = a;

            data2 = b;

        }



        virtual void display() {

            cout << "I am Base class" << endl;

        }

};



class Derived : public Base {

        int data3;

    public:

        Derived(int a, int b, int c) : Base(a, b) {

            data3 = c;

        }



        void display() {

            cout << "I am Derived class" << endl;

        }

};



void somefunc ( Base obj )

{

    obj.display();

}



int main()

{

    Base b(10, 20);

    Derived d(100, 200, 300);



    somefunc(b);

    somefunc(d);

}



OUTPUT:

I am Base class

I am Base class