98 Create class student having method getdata() which should accept details of student such as rollno, name and marks of 3 subject. Extend class result from student. Define a method cal() in result to calculate the total and average of marks and display it.

Code:

import java.util.Scanner;
class Student
{
// Instance Variable
int rollno,m1,m2,m3;
String name;   

void getdata()
{
Scanner scan = new Scanner(System.in);
System.out.println("\n\n Enter Student Name , roll no , and marks of 3 subject: ");

name = scan.nextLine();
rollno = scan.nextInt();
m1 = scan.nextInt();
m2 = scan.nextInt();
m3 = scan.nextInt();

}
}

class Result extends Student
{
int total ;
float average;

void cal()
{
total = m1+m2+m3;
average =  total / 3.0f;

System.out.println(" Total marks: "+total);
System.out.println(" Average: "+average);
}

public static void main( String args[] )
{
Result r = new Result();
r.getdata();

System.out.println("\n\n Student Details:  \n");
System.out.println("Name: "+r.name);

r.cal();
}
}

Ouput:

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