Usage (Client Code):?

• The client creates a list of shopping cart elements (books, fruits), and then applies

the visitor (ShoppingCart) to calculate the total cost, which includes applying the

discount to books.

class Program

static void Main()

var items = new List<IShoppingCartElement>

new Book(20),

new Fruit(5)

var cart = new ShoppingCart();

foreach (var item in items)

Follow:

item.Accept(cart); // Visitor applies operation

(discount/tax)

Console.WriteLine($"Total: {cart.GetTotal()}"); // Total:

24.5 (Book with discount + fruit without discount)

Output:

Total: 24.5

How the Visitor Pattern Works: