arun-udayakumar

Object Slicing Example in C++

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Arun Udayakumar
·

1 min read

#include <iostream>
#include <string>

class Base {
public:
    Base(const std::string& msg) : message(msg) {}
    virtual void display()  {
        std::cout << "Base: " << message << std::endl;
    }

private:
    std::string message;
};

class Derived : public Base {
public:
    Derived(const std::string& msg, const std::string& extra) : Base(msg), extraMessage(extra) {}
    void display() override {
        std::cout << "Derived: " << extraMessage << std::endl;
    }

private:
    std::string extraMessage;
};

int main() {
    Derived derivedObj("Base Message", "Derived message");

    Base baseObj = derivedObj; // Pass by Value, Object slicing happens here
    baseObj.display();         // Calls Base::display()

    Base* baseObj1 = &derivedObj; // Pass by ref
    baseObj1->display();         // Calls Derived::display()


    return 0;
}

Output:

Base: Base Message //Sliced Object's output
Derived: Derived message
C++