import java.util.Arrays;

class Array2D {
    public static void main(String[] args) {
        int[][] array2D = new int[9][5];
        int sum = 0;

        for (int i = 0; i < array2D.length; i++) {
            for (int j = 0; j < array2D[i].length; j++) {
                array2D[i][j] = j*j - i + 1;
                sum += j*j - i + 1;
            }
        }

        printArray(array2D);

        int returverdi = leggSammen2DArray(array2D);
        Test.test("sjekker sum av 2D array", returverdi, sum);
    }

    private static void printArray(int[][] array) {
        for (int i = 0; i < array.length; i++) {
            System.out.println(Arrays.toString(array[i]));
        }
    }

    public static int leggSammen2DArray(int[][] array2D){
        return finnArray2Dsum(array2D, 0);
    }

    public static int finnArray2Dsum(int[][] array2D, int i) {
        if (i >= array2D.length) return 0;

        return finnArraySum(array2D[i], 0) + finnArray2Dsum(array2D, i + 1);
    }


    public static int finnArraySum(int[] array, int i) {
        if (i >= array.length) return 0;

        return array[i] + finnArraySum(array, i + 1);
    }

}