Ex09, 19.06.2021

import java.util.Scanner;

public class Ex09 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int y; // grade entered by the user
        int c = 0; // count valid grades
        int sum = 0;
        double avg;
        double max = 0;
        int classesNo;

        String className;
        int pupilsInClass;

        System.out.print("enter the number of the classes: ");
        classesNo = in.nextInt();

        for (int j = 0; j < classesNo; j++) {
            // new class
            max = 0;

            System.out.print("Enter class name: ");
            className = in.next();
            System.out.print("Enter number of pupils in class " + className + ": ");
            pupilsInClass = in.nextInt();

            for (int i = 0; i < pupilsInClass; i++) {
                // new student
                System.out.println("* * * New Pupil Data * * *");
                c = 0;
                sum = 0;

                // get first grade
                System.out.print("Enter your grade (0 to 100): ");
                y = in.nextInt();

                while (y >= 0 && y <= 100) {
                    // valid grade
                    c++; // add 1 to the counter
                    sum = sum + y; // add grade to sum

                    // get next grade
                    System.out.print("Enter your grade (0 to 100): ");
                    y = in.nextInt();
                }

                System.out.println("You have " + c + " grades");
                System.out.println("The sum of grades is " + sum);
                avg = (double) sum / c;
                System.out.println("The average is " + avg);

                if (avg > max) {
                    max = avg;
                }
            }

            System.out.println("max average is " + max);
        }
        in.close();
    }
}