/*
    AverageAge.java
    David G. Klick
    September 28, 2007
    CIS 111
 
    Demonstrates a loop used to calculate average age.
*/ 

public class AverageAge extends CIS111App {
    public static void main(String[] args) {
        // declare variables
        int sum = 0;
        int age = 0;
        int ctr = 0;
      
        // display intro message
        println("This program calculates an average age for a group of people");
      
        // get age from user - priming read
        age = getInt("Enter an age (0 or less to end): ");
      
        // loop to accumulate ages
        while (age > 0) {
            sum = sum + age;
            ctr = ctr + 1;
            age = getInt("Enter an age (0 or less to end): ");
        }
      
        // display results
        println("Total number of ages entered: " + ctr);
        println("Total of all ages entered: " + sum);
        double average = (double)sum / ctr;
        printf("Average of all ages entered: %.2f\n", average);
    }
}