/*EXPT 6*/
/*File me likha*/

//parent class - student and child class - ScienceStudent
#include <iostream>
using namespace std;
class Student{
public:
    int rno;
    int marks;

    Student(int r, int m) : rno(r), marks(m) {}

    void display(){
        cout << "Student Roll No.: " << rno << endl;
        cout << "Student Marks: " << marks << endl;
    }
};

class ScienceStudent : public Student{
public:
    ScienceStudent(int r, int m) : Student(r, m) {}

    void display(){
        cout << "Science Student Roll No.: " << rno << endl;
        cout << "Science Student Marks: " << marks << endl;
    }
};

int main(){
    ScienceStudent student1(101, 85);
    student1.display();
    return 0;
}










/*Better code*/









#include <iostream>
using namespace std;

// Base class
class Student {
public:
    int rno;
    int marks;

    // Constructor to initialize values
    Student(int r, int m) : rno(r), marks(m) {}

    // Function in base class
    void display(){
        cout << "Student Roll No.: " << rno << endl;
        cout << "Student Marks: " << marks << endl;
    }
};

// Derived class for ScienceStudent
class ScienceStudent : public Student {
public:
    ScienceStudent(int r, int m) : Student(r, m) {}

    // Function overriding the base class function
    void display() {
        cout << "Science Student Roll No: " << rno << endl;
        cout << "Science Student Marks: " << marks << endl;
    }
};

// Derived class for ArtsStudent
class ArtsStudent : public Student {
public:
    ArtsStudent(int r, int m) : Student(r, m) {}

    // Function overriding the base class function
    void display() {
        cout << "Arts Student Roll No: " << rno << endl;
        cout << "Arts Student Marks: " << marks << endl;
    }
};

int main() {
    // Create objects of derived classes
    ScienceStudent student1(101, 85);
    ArtsStudent student2(102, 90);
    
    // Call function using base class reference, invoking the overridden function
    student1.display(); // Outputs: Science Student details
    student2.display(); // Outputs: Arts Student details

    return 0;
}