Copy Constructor in c++

 #include<iostream>

using namespace std;

class student { 

public:

    string name;

    student(string n) { 

        name = n;

    }

    student(student &s) { 

        name = s.name;

    }

    void display() { 

        cout << "Name of Student is : " << name << endl;

    }

};

int main() { 

    student s1("Abc");

    student s2 = s1;

    cout << "--- Before modification ---" << endl;

    s1.display();

    s2.display();

    s2.name = "Xyz";

    cout << "\n--- After modification ---" << endl;

    s1.display();

    s2.display();

    return 0;

}

Explanation :

​Direct Assignment: Is code mein name = s.name; ho raha hai. Kyunki string aik object hai, C++ iski value ko copy kar deta hai.

​Independent Objects: Jab aapne s2.name = "Xyz"; kiya, to sirf s2 ka dabba (variable) update hua. s1 ka dabba "Abc" hi raha.

​Output Difference: * Modification se pehle: Dono "Abc" thay.

​Modification ke baad: s1 "Abc" raha aur s2 "Xyz" ban gaya.

​Output:

​--- Before modification ---

Name of Student is : Abc

Name of Student is : Abc

​--- After modification ---

Name of Student is : Abc

Name of Student is : Xyz