/** OnlineShopper.java
    A class that maintains a shopping cart for an online store.
    @author Frank M. Carrano
    @version 4.0
*/
public class OnlineShopper
{
    public static void main(String[] args)
    {
        Item[] items =
        {
            new Item("Bird feeder", 2050),
            new Item("Squirrel guard", 1547),
            new Item("Bird bath", 4499),
            new Item("Sunflower seeds", 1295)
        };
        //Exactly one of the following three lines must be activated:
        //BagInterface<Item> shoppingCart = new FixedSizeArrayBag<>();
        //BagInterface<Item> shoppingCart = new ResizableArrayBag<>();
        //
        BagInterface<Item> shoppingCart = new LinkedBag<>();

        int totalCost = 0;
        //Statements that add selected items to the shopping cart:
        for (int index = 0; index < items.length; index++)
        {
            Item nextItem = items[index]; //Simulate getting item from shopper
            shoppingCart.add(nextItem);
            totalCost = totalCost + nextItem.getPrice();
        }
        //Simulate checkout
        while (!shoppingCart.isEmpty())
            System.out.println(shoppingCart.remove());
        System.out.println
        (
            "Total cost: " + "\t$"
            + totalCost / 100 + "." + totalCost % 100
        );
    }
}
/*  Output:
    Sunflower seeds $12.95
    Bird bath       $44.99
    Squirrel guard  $15.47
    Bird feeder     $20.50
    Total cost:     $93.91
*/