public void ProcessPurchase(int customerId, int goodId)
{
Customer c = Customer.FindCustomer(customerId);
Order o = Stock.Find(goodId);
CreditCardInfo cci = c.GetCreditCardInfo();
BankGateway gateway = new BankGateway();
gateway.ChargeCard(cci, o);
c.AddToStatistics(o);
}
void Purchase()
{
int id = 123;
Customer c = Customer.FindCustomer(id);
int goodId = 13457;
Order o = Stock.Find(goodId);
CreditCardInfo cci = c.GetCreditCardInfo();
BankGateway gateway = new BankGateway();
gateway.ChargeCard(cci, o);
c.AddToStatistics(o);
}