// CSE 142, Autumn 2009, Marty Stepp
// This program uses variables to compute the bill at a restaurant.
// This third and final version is improved by adding static methods.

import java.util.*;

public class Receipt3 {
    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);
        double subtotal = meals(console);
        results(subtotal);
    }
    
    // Prompts for each person's meal cost and returns the subtotal.
    public static double meals(Scanner console) {
        System.out.print("How many people ate? ");
        int howMany = console.nextInt();
        double subtotal = 0.0;
        
        // read each meal's cost and add them using a cumulative sum
        for (int i = 1; i <= howMany; i++) {
            System.out.print("Person #" + i + 
                             ": How much did your dinner cost? ");
            double cost = console.nextDouble();
            subtotal = subtotal + cost;   // subtotal += cost;
        }
        return subtotal;
    }
        
    // Calculates total owed for the given subtotal,
    // assuming 8% tax and 15% tip
    public static void results(double subtotal) {
        double tax = subtotal * .08;
        double tip = subtotal * .15;
        double total = subtotal + tax + tip;
        
        System.out.println("Subtotal: $" + subtotal);
        System.out.println("Tax: $" + tax);
        System.out.println("Tip: $" + tip);
        System.out.println("Total: $" + total);
    }
}