// Helene Martin, CSE 142
// Calculate total owed, assuming 8% tax / 15% tip

// goal: demonstrate using returns to structure a program well
// demonstrate using a cumulative sum with Scanner input
import java.util.*;

public class Receipt {
	public static void main(String[] args) {
		Scanner console = new Scanner(System.in);
		
		double subtotal = getSubtotal(console);
		double tipAmount = getTip(console);
	
		reportResults(subtotal, tipAmount);
	}
	
	// Prompts user for meal costs and returns subtotal.
	public static double getSubtotal(Scanner console) {
		System.out.print("How many people ate? ");
		int people = console.nextInt();

		double subtotal = 0;
		for (int i = 1; i <= people; i++) {
			System.out.print("Person #" + i + ": how much was your meal? ");
			double price = console.nextDouble(); 
			subtotal = subtotal + price;
		}
		return subtotal;
	}
	
	// Prompts user for tip amount and returns it.
	public static double getTip(Scanner console) {
		System.out.print("What percent tip will you leave? ");
		double tipAmount = console.nextDouble();
		return tipAmount;	
	}
	
	// Prints subtotal, tax, tip and total based on subtotal and tip amount.
	public static void reportResults(double subtotal, double tipAmount) {
		double tax = subtotal * .08;
		double tip = subtotal * tipAmount / 100;
		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);	
	}
}