import java.util.*;

class assignment3 {
    // you need static as it is a nested class
    public static class student {

        private int id;
        private double[] grades = new double[3];
        private double totalGrade;

        public student() {
            Scanner sc = new Scanner(System.in);
            System.out.println("please enter student id and grades");
            this.id = sc.nextInt();
            this.grades[0] = sc.nextDouble();
            this.grades[1] = sc.nextDouble();
            this.grades[2] = sc.nextDouble();
            this.totalGrade = this.grades[0] + this.grades[1] + this.grades[2];
        }

        public double getTotalGrade() {
            return this.totalGrade;
        }

        public double[] getGrades() {
            return this.grades;
        }

        public int getId() {
            return this.id;
        }

        public double getAvg() {
            return this.totalGrade / 3;
        }

    }

    public static void main(String args[]) {

        student st1 = new student();
        student st2 = new student();
        student st3 = new student();

        System.out.println("Total for student 1 is " + st1.getTotalGrade());
        System.out.println("Total for student 2 is " + st2.getTotalGrade());
        System.out.println("Total for student 3 is " + st3.getTotalGrade());

        System.out.println("Average of grades for student 1 is " + st1.getAvg());
        System.out.println("Average of grades for student 2 is " + st2.getAvg());
        System.out.println("Average of grades for student 3 is " + st3.getAvg());

    }
}