H6/H8 (deel2) - Oefening 4

package ui;

import java.util.Scanner;

/**
 *
 * @author piteru-san
 */
public class ExamenApplicatie
{
    private int aantalExamens = 5;

    public static void main(String[] args)
    {
        int[][] examens = new int[2][5];
        int[] percentages = new int[2];

        voerExamensAlleStudentenIn(examens);
        berekenPercentage(examens, percentages);
        System.out.printf("%s%ngemiddelde: %.2f%n", maakUitvoer(examens, percentages), berekenGemiddeldPercentage(percentages));
    }

    private static void voerExamensAlleStudentenIn(int[][] array)
    {
        Scanner s = new Scanner(System.in);
        int aantalExamens;

        for(int index = 0; index < array.length; index++)
        {
            do
            {
            System.out.printf("Hoeveel examens heeft student %d afgelegd (max = 5): ", index + 1);
            aantalExamens = s.nextInt();
            }
            while(aantalExamens < 0 || aantalExamens > 5);

            int[] array2 = new int[aantalExamens];

            voerPuntenPerStudentIn(array2);

            array[index] = array2;
        }
    }

    private static void voerPuntenPerStudentIn(int[] array)
    {
        Scanner s = new Scanner(System.in);

        for(int index = 0; index < array.length; index++)
        {
            do
            {
                System.out.printf("Examen %d (op 20): ", index+1);
                array[index] = s.nextInt();
            }
            while(array[index] < 0 || array[index] > 20);
        }
    }

    public static void berekenPercentage(int[][] examen, int[] percentages)
    {
        for(int index = 0; index < examen.length; index++)
        {
            int totaal = 0;
            int percentage;
            for(int index2 = 0; index2 < examen[index].length; index2++)
            {
                totaal += examen[index][index2];
            }
            percentage = (totaal*100/(examen[index].length*20));
            percentages[index] = percentage;
        }
    }

    private static String maakUitvoer(int[][] examen, int[] percentages)
    {
        String s = "";

        for(int index = 0; index < examen.length; index++)
        {
            s += String.format("Student %d", index + 1);
            int controle = 0;

            for(int index2 = 0; index2 < examen[index].length; index2++)
            {
                if(examen[index][index2] < 10)
                    controle++;

                s += String.format("%10d", examen[index][index2]);
            }

            s += String.format("%npercentage : %d %s%n", percentages[index], (percentages[index] >= 60 && controle == 0) ? "Geslaagd" : "Niet geslaagd");
        }

        return s;
    }

    public static double berekenGemiddeldPercentage(int[] percentages)
    {
       int totaal = 0;
       double gemiddelde;

       for(int index = 0; index < percentages.length; index++)
       {
           totaal += percentages[index];
       }

       gemiddelde = totaal/percentages.length;

       return gemiddelde;
    }
}