#7 of Homework

AverageCalculator.java

import java.util.Scanner;

public class AverageCalculator {

  public static void main(String[] args) {
		Scanner keyboard = new Scanner(System.in);
		float sum = 0;
		int count = 0;
		mainLoop: while (true) {
			System.out.print("Input a number, -1 to find average: ");
			try {
				float input = keyboard.nextFloat();
				if (input != -1) {
					sum += input;
					count += 1;
					System.out.println("The sum of of the " + count + " numbers is " + (int) sum);
				} else {
					System.out.println("The average of these numbers are " + (sum / count));
					sum = 0;
					count = 0;
				}
			} catch (Exception e) {
				System.out.println("Invalid input, please enter a float or int");
				keyboard.next();
				continue mainLoop;
			}

		}
	}
}