P. 90 Ex. 11.11

// Shavit Borisov
// CW

import java.util.Scanner;

public class ClassGrades {

    public static void main(String[] args)

    {
        Scanner in = new Scanner (System.in);
        Grades obj = new Grades();

        System.out.print("How many students are there in your class? ");
        int classSize = in.nextInt();

        obj.classSize(classSize);

        for(int i = 0; i < classSize; i++)
        {
            System.out.printf("Enter the math grade for student number %d: ", i + 1);
            int currentMath = in.nextInt();

            System.out.printf("Enter the hebrew grade for student number %d: ", i + 1);
            int currentHebrew = in.nextInt();

            obj.setGrade(i, currentMath, currentHebrew);
        }

        System.out.printf("The average grade for math is %.2f\n", obj.mathAvg());
        System.out.printf("The average grade for hebrew is %.2f\n", obj.hebrewAvg());

        in.close();
    }
}

// Next class

public class Grades

{
    private int size = 20; // Default value

    public void classSize(int size)
    {
        this.size = size;
    }

    private int[] math = new int[size];
    private int[] hebrew = new int[size];

    public void setGrade (int id, int math, int hebrew)
    {
        this.math[id] = math;
        this.hebrew[id] = hebrew;
    }

    public double mathAvg()
    {
        double sum = 0;
        for(int i = 0; i < size; i++)
        {
            sum += math[i];
        }
        sum /= size;
        return sum;
    }

    public double hebrewAvg()
    {
        double sum = 0;
        for(int i = 0; i < size; i++)
        {
            sum += hebrew[i];
        }
        sum /= size;
        return sum;
    }
}