/*
 * Design a class called Student having data members like student name and roll
 * number and method called show to display the name and roll number. Derive a
 * class called Test from student class having three subjects marks as a data
 * members and method named show_marks to display the marks. Create an interface
 * called Sports contains constant sports marks and method show_sportswt. Derive
 * a class Result from Test class and implement the interface Sports. Calculate
 * total marks by considering sports marks. Then display the total in Result
 * class.
 */

package Derived_Class;

import java.util.Scanner;

class Student {
	String name;
	int rollno;

	Student(String name, int rno) {
		this.name = name;
		rollno = rno;
	}

	void show() {
		System.out.println("Name: " + name + "\nRoll Number: " + rollno);
	}
}


class Test extends Student {
	int sub1, sub2, sub3;

	Test(int sub1, int sub2, int sub3, String name, int rno) {
		super(name, rno);
		this.sub1 = sub1;
		this.sub2 = sub2;
		this.sub3 = sub3;
	}

	void show_marks() {
		super.show();
		System.out.println("Subject 1: " + sub1 + "\nSubject 2: " + sub2 + "\nSubject 3: " + sub3);
	}
}


interface Sports {
	final int sport_mark = 40;

	void show_sportswt();
}


class Result extends Test implements Sports {
	int total = sub1 + sub2 + sub3 + sport_mark;

	public void show_sportswt() {
		System.out.println("Sports marks: " + sport_mark);
	}

	Result(String name, int rollno, int sub1, int sub2, int sub3) {
		super(sub1, sub2, sub3, name, rollno);
	}

	void display() {
		super.show_marks();
		System.out.println("Total Marks: " + total);
	}
}

public class StudentResult {
    public static void main(String[] args){
        Scanner s = new Scanner(System.in);
		System.out.println("Enter name, roll number and marks in 3 subjects:");
		String name = s.nextLine();
		int rno = s.nextInt();
		int sub1 = s.nextInt();
		int sub2 = s.nextInt();
		int sub3 = s.nextInt();

		Result res = new Result(name, rno, sub1, sub2, sub3);

		res.display();
		res.show_sportswt();

		s.close();
    }
}