Question

Java:

Declare a two-dim array that represents five students with four test scores.

Assign 100 for all tests to all students.

Change the 3rd student’s test 2 to 50.

Change the last student’s last test to 87

Print out all test scores.

Calculate the total points of all tests of all students

Answer 1

//Java code

public class Main {
    public static void main(String[] args)
    {
        /**
         * Declare a two-dim array that represents five students with four test scores.
         */
        String[][] array = new String[5][5];
        /**
         * Assign 100 for all tests to all students.
         */

        for (int i = 0; i <array.length ; i++) {
            array[i][0]="Student"+(i+1);
            for (int j = 1; j <array[i].length ; j++) {
                array[i][j] = "100";
            }
        }
        //Change the 3rd student’s test 2 to 50.
        array[2][2] = "50";
        //Change the last student’s last test to 87
        array[4][4] = "87";
        System.out.println("\n===========================================================================");
        //heading
        System.out.println(String.format("%10s %10s %10s %10s %10s","Student","Score1","Score2","Score3","Score4"));
        //Print out all test scores.
        for (int i = 0; i <array.length ; i++) {

            for (int j = 0; j <array[i].length ; j++) {
                System.out.print(String.format("%10s",array[i][j]));
            }
            System.out.print("\n");
        }
        //Calculate the total points of all tests of all students
        int[] sum = new int[5];
        for (int i = 0; i <array.length ; i++) {

            for (int j = 1; j <array[i].length ; j++) {
                sum[i]+=Integer.parseInt(array[i][j]);
            }
        }
        System.out.println("\n===========================================================================");
        //Print report
        //heading
        System.out.println(String.format("%10s %10s %10s %10s %10s %10s","Student","Score1","Score2","Score3","Score4","Total"));
        for (int i = 0; i <array.length ; i++) {

            for (int j = 0; j <array[i].length ; j++) {
                System.out.print(String.format("%10s ",array[i][j]));
            }
            System.out.print(String.format("%10s ",sum[i]));
            System.out.print("\n");
        }
    }
}

//output

//If you need any help regarding this solution ......... please leave a comment ........ thanks