/* 
 * File: AverageScores.java
 * ------------------------
 * This program shows an example of using arrays.
 */

import acm.program.*;

public class AverageScores extends ConsoleProgram {
    
	private static final int SENTINEL = -1;
	private static final int MAX_SCORES = 1000;	// actual size
	
    public void run() {
    	setFont("Courier New-bold-24");

     	int[] midtermScores = new int[MAX_SCORES];
    	int numScores = 0;				// effective size
    	
    	while (true) {
		int score = readInt("Score: ");
		if (score == SENTINEL) break;
		midtermScores[numScores++] = score;
	}
    	
    	double averageScore = computeAverage(midtermScores, numScores);
    	
    	println("Average score: " + averageScore);
    }

    private double computeAverage(int[] arr, int numScores) {
    	double average = 0;
    	for(int i = 0; i < numScores; i++) {
    		average += arr[i];
    	}
    	average = average / numScores;
    	return average;
    }
    
}