Question

please help with the TODO's in bold below!

 * Java application: CS140_Arrays.java
 *
 * Need to be done!
 *
 * TODO#1: Change the name and date accordingly
 * Created by , 11/25/2019
 */

public class CS140_Arrays_Done
{
        //TODO#2: Define two private static constants: rows (set to 5) & cols (set to 3)



        //array for the values
        private static double[][] values = { { 9, 10, 8 },
                                                                                 { 3.5, 10, 8.5 },
                                                                                 { 10, 8.5, 9 },
                                                                                 { 8.5, 10, 7.5},
                                                                                 { 10, 7.5, 8 } };

        public static void main(String[] args)
        {
                //arrays for rowAvgs and colAvgs
                        //rowAvgs: average all values for each row
                        //colAvgs:  average all values for each column
                double[] rowAvgs = new double[rows];
                double[] colAvgs = new double[cols];

                calculateRowAvgs(rowAvgs);

                /* TODO#4: call method calculateColAvgs to have column average result */



    } //end main method

        //calculate the average of all values for each row
        public static void calculateRowAvgs(double[] rowAvgs)
        {
                /* TODO#3: add the nested for loop to
                 * calculate the average of all values for each row and print out
                 * use the next method as an example */


        } //end method calculateRowAvgs

        //calculate the average of all values for each column
        public static void calculateColAvgs(double[] colAvgs)
        {
                System.out.println();
                for (int i=0; i

Answer 1

/*Java application:CS140_Arrays.java
 *
 *Need to be done!
 *
 *TODO#1:Change the name and date accordingly
 *Created by,11/25/2019
 */

public class CS140_Arrays_Done {
    //TODO#2: Define two private static constants: rows (set to 5) & cols (set to 3)


    //array for the values
    private static double[][] values = {{9, 10, 8},
            {3.5, 10, 8.5},
            {10, 8.5, 9},
            {8.5, 10, 7.5},
            {10, 7.5, 8}};

    public static void main(String[] args) {
        //arrays for rowAvgs and colAvgs
        //rowAvgs: average all values for each row
        //colAvgs:  average all values for each column
        double[] rowAvgs = new double[values.length];
        double[] colAvgs = new double[values[0].length];

        calculateRowAvgs(rowAvgs);
        calculateColAvgs(colAvgs);

        System.out.print("Row averages are:");
        for (int i = 0; i < rowAvgs.length; i++) {
            System.out.print(" " + rowAvgs[i]);
        }
        System.out.println();

        System.out.print("Column averages are:");
        for (int i = 0; i < colAvgs.length; i++) {
            System.out.print(" " + colAvgs[i]);
        }
        System.out.println();
    } //end main method

    //calculate the average of all values for each row
    public static void calculateRowAvgs(double[] rowAvgs) {
        /* TODO#3: add the nested for loop to
         * calculate the average of all values for each row and print out
         * use the next method as an example */
        for (int i = 0; i < values.length; i++) {
            rowAvgs[i] = 0;
            for (int j = 0; j < values[i].length; j++) {
                rowAvgs[i] += values[i][j];
            }
            rowAvgs[i] /= values[i].length;
        }
    } //end method calculateRowAvgs

    //calculate the average of all values for each column
    public static void calculateColAvgs(double[] colAvgs) {
        for (int i = 0; i < values[0].length; i++) {
            colAvgs[i] = 0;
            for (int j = 0; j < values.length; j++) {
                colAvgs[i] += values[j][i];
            }
            colAvgs[i] /= values.length;
        }
    }
}