UNB/ CS/ David Bremner/ teaching/ cs1083/ java/ RunningAverage.java
public class RunningAverage{

    private static final int MAX_SCORES = 100;

    private double average;

    private int count;
    private double[] scores;

    public RunningAverage() {
        count = 0;
        average = 0.0;
        scores = new double[MAX_SCORES];
    }

    public void add(double score) {
        if (count >= MAX_SCORES)
            throw new RuntimeException();
        scores[count] = score;
        average = ((average * count) + score)/(count+1);
        count++;
    }

    public double getAverage() {
        return average;
    }

    public static void main (String [] args) {
        RunningAverage scores = new RunningAverage();
        for (int i=0; i<20; i++){
            scores.add(i);
            System.out.println(scores.getAverage());
        }
    }
}