Multilevel Inheritance

import java.util.Scanner;

class A

{

    int regno;

    String name;

    Scanner s=new Scanner(System.in);

    void getA()

    {

        System.out.println("Enter the Name of the Student");

        name=s.next();

        System.out.println("Enter the Register number of the student");

        regno=s.nextInt();

    }

    void displayA()

    {

        System.out.println("    MARK STATEMENT ");

        System.out.println("    ************** ");

        System.out.println("Name  :"+name+"        Regno:"+regno);

    }

}

class B extends A

{

    int DM, CN, OS, RDBMS;

    void getB()

    {

        System.out.println("Enter the marks for the following Subjects");

        System.out.print("Data Mining =");

        DM=s.nextInt();

        System.out.print("Computer Networks =");

        CN=s.nextInt();

        System.out.print("Operating Systems =");

        OS=s.nextInt();

        System.out.print("RDBMS =");

        RDBMS=s.nextInt();

    }

    void  displayB()

    {

        System.out.println("************************************");

        System.out.println("Subjects                  Marks");

        System.out.println("************************************");

        System.out.println("Data Mining                 "+DM);

        System.out.println("Computer Networks           "+CN);

        System.out.println("Operating Systems           "+OS);

        System.out.println("RDBMS                       "+RDBMS);

        System.out.println("************************************");

    }

}

class C extends B

{

    int total;

    double avg;

    void calc()

    {

        total=DM+CN+OS+RDBMS;

        avg=total/4;

    }

    void displayC()

    {

 System.out.println(" Average="+avg+" Total="+ total);        
System.out.println("************************************");

         if(DM>40&&CN>40&&OS>40&&RDBMS>40)

           System.out.println("Result=PASS");

        else

            System.out.println("Result=FAIL");

         System.out.println();

         System.out.println();       

    }

}

public class Mlevelinherit

{

    public static void main(String[] abc)

    {

            C c1=new C();          

            c1.getA();

            c1.getB();

            c1.calc();

            c1.displayA();

            c1.displayB();

            c1.displayC();

}

}

Output:-

Enter the Name of the Student

Monica_Nivetha

Enter the Register number of the student

002

Enter the marks for the following Subjects

Data Mining =80

Computer Networks =90

Operating Systems =85

RDBMS =65

    MARK STATEMENT

    ******************

Name  : Monica_Nivetha        Regno:2

************************************

Subjects                                       Marks

************************************

Data Mining                                  80

Computer Networks                      90

Operating Systems                        85

RDBMS                                         65

************************************

Average=80.0                   Total=320           

************************************

Result=PASS