/* T02n01.java -- Our first step-counting example.  In the `average' method,
 *   each operation has an associated increment of the operation counting
 *   variable.  The counter, o, is global with the idea that it could be
 *   used in other methods without having to add a variable declaration
 *   to each, plus we don't have to worry about returning it from a method
 *   that already needs to return something as part of its normal
 *   operation.
 */

import java.io.*;

public class T02n01
{
    public static int o = 0;                   // operation counter
    
    public static double average (double [] list, int n)
    {
                                double mean;
                                double sum = 0;
        o++;

        o++;
                                for (int i=0; i<n; i++) {
        o++;
                                    sum = sum + list[i];
        o++; o++; o++; o++;
        o++;
                                }
        o++;

                                mean = sum / n;
        o++; o++;

                                return mean;
    }

    public static void main (String[] args)
    {
        double [] list = {1, 2, 4, 3, 5, 6, 8, 7, 9};
        double mean;

        mean = average(list, list.length);

        System.out.println("n = " + list.length 
                           + "; Operation count = " + o + ".");
    }
}