public void ExampleOfPrintingCash()
{
var cashPayment = new CashPaymentMethod();
cashPayment.ProcessPayment(
cash =>
{
Console.WriteLine("Paid in cash");
return 0;
},
cheque => 0, //ignore
card => 0 //ignore
);
}
static void Main(string[] args)
{
var book1 = new Book(100, "The Bell");
var food1 = new Food(100, "Hot dog");
var food2 = new Food(200, "Bread");
var book2 = new Book(200, "Into The Woods");
var book3 = new Book(200, "Final Exams");
var food3 = new Food(200, "Noodle");
var book4 = new Book(300, "Conan");
var food4 = new Food(300, "Soup");
var cash = new CashPaymentMethod();
var visa = new VisaPaymentMethod();
var ewallet = new EWalletPaymentMethod();
// Book discount 10%: 100$ -> 90$
var cost1 = book1.Accept(cash) + food1.Accept(cash);
Console.WriteLine($"Cost 1: {cost1}");
// Food discount 10%: 200$ -> 180$
var cost2 = book2.Accept(visa) + food2.Accept(visa);
Console.WriteLine($"Cost 2: {cost2}");
// Book < 200 discount 10%: 200$ -> 180$
var cost3 = book3.Accept(cash) + food3.Accept(ewallet);
Console.WriteLine($"Cost 3: {cost3}");
// Book > 200 discount 20%: 300$ -> 240$
// Food > 200 discount 10%: 300$ -> 270$
var cost4 = book4.Accept(ewallet) + food4.Accept(ewallet);
Console.WriteLine($"Cost 4: {cost4}");
}
