This document contains code that implements inheritance and method overloading. It defines a base mob class with getmob and putmob methods to retrieve and display student roll number and name. The drive class inherits from mob and overloads getdrive and putdrive methods to also retrieve and display subject marks. The pen class inherits from drive and overloads getresult and putresult methods to calculate and display the total marks. The main method creates a pen object and calls its methods.

1. //Ques. 10 WAP to implement inheritance and overloading methods.
importjava.util.*;
class mob
{
privateint roll;
private String name;
Scanner x=new Scanner(System.in);
public void getmob( )
{
System.out.print("n Enter Roll No. = ");
roll=x.nextInt( );
System.out.print("n Enter Name = ");
name=x.next( );
}
public void putmob( )
{
System.out.println("n Roll No. : "+roll);
System.out.println("n Name: "+name);
}
}
class drive extends mob
{
publicintp,c,m;
voidgetdrive( )
{

2. getmob( );
Scanner in=new Scanner(System.in);
System.out.print("n Marks in Physics: ");
p=in.nextInt( );
System.out.print(" Marks in Chemistry: ");
c=in.nextInt( );
System.out.print(" Marks in Maths: ");
m=in.nextInt( );
}
public void putdrive( )
{
putmob( );
System.out.println("n Marks: "+p+", "+c+", "+m);
}
}
class pen extends drive
{
privateint tm;
voidgetresult( )
{
getdrive( );
tm=p+c+m;
}
voidputresult( )
{
putdrive( );

3. System.out.println(" Total Marks: "+tm);
}
}
class computer
{
public static void main(String arg[ ])
{
pen s=new pen( );
s.getresult( );
s.putresult( );
}
}
OUTPUT:-