Program 5.17

/**
 * Created with IntelliJ IDEA.
 * User: Bobby
 * Date: 11/2/13
 * Time: 7:53 AM

 A mail-order house sells five products whose retail prices are as follows. Product 1, $2.98; Product 2,
 $4.50; Product 3 $9.98; Product 4 $4.49; and Product 5 $6.87. Write an application that reads a series of
 pairs of number as followers:
 a) product number
 b) quantity sold
 Your program should use a switch statement to determine the retail price for each product. It should
 calculate and display the total retail value of all products sold. Use sentinel-control (while or for
 statement) loop to determine when the program should stop looping and display the result.
 */

import java.util.Scanner;

public class Mailorders {
    public static void main(String[] args) {
        double products[] = {2.98, 4.5, 9.98, 4.49, 6.87}; //product prices
        int productNumber;
        int quantity;
        double totalSale = 0;
        Scanner input = new Scanner(System.in);
        System.out.println("Enter product # (Enter -1 to quit):");
        productNumber = input.nextInt();
        while (productNumber != -1) {
            System.out.println("Enter quantity #:");
            quantity = input.nextInt();
            switch (productNumber) {
                case 1:
                    totalSale += quantity * products[0];
                    break;
                case 2:
                    totalSale += quantity * products[1];
                    break;
                case 3:
                    totalSale += quantity * products[2];
                    break;
                case 4:
                    totalSale += quantity * products[3];
                    break;
                case 5:
                    totalSale += quantity * products[4];
                    break;
                default:
                    System.out.println("Error");
                    break;
            }
            System.out.println("Total sale is: " + totalSale);
            System.out.println("Enter product # (Enter -1 to quit):");
            productNumber = input.nextInt();
        }

    }
}