Question

Finish the program below by adding the code to print the running average, where the average is based on a moving set of k values. For example, when k = 3, the program would print the average of {1, 2, 3}, then the average of {2, 3, 10}, then the average of {3, 10, 9}, and so forth, finishing with the average of {9, 10, 13}. Print the average to three decimal places. The code that you write should not be hard-coded to this particular data except for the fact that there are nine values in the list. Int k is given by user input.


int[] d = {1, 2, 3, 10, 9, 8, 4, 5, 6, 6, 5, 6, 9, 10, 13}; int k;

USE JAVA TO COMPLETE CODE!!!

Answer 1

import java.util.Scanner;

public class RunningAverage {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int[] d = {1, 2, 3, 10, 9, 8, 4, 5, 6, 6, 5, 6, 9, 10, 13};
        int k;

        System.out.print("Enter a value for k: ");
        k = in.nextInt();

        double sum = 0;
        System.out.println("Running averages are");
        for (int i = 0; i < d.length; i++) {
            if (i >= k) {
                System.out.printf("%.3f\n", sum/(double)k);
                sum -= d[i-k];
            }
            sum += d[i];
        }
        System.out.printf("%.3f\n", sum/(double)k);
    }
}