public virtual void Purchase(Customer c)
{
if (status != MachineStatus.Shutdown)
{
// customer make selection
chosen = new Good("Вафли");
display.Show("Вы выбрали " + chosen.Name);
expected = prices[chosen];
while (!CheckTotal())
{
if (cancel)
break;
display.Show("Внесите " + WaitFor() + " руб");
c.CheckoutWallet();
Coin coin = c.Find();
if (c.isAvaliable(coin))
{
c.Spend(coin);
Insert(c, coin);
}
if (totalBill > expected)
c.Get(new Coin(totalBill-expected));
}
c.CheckoutWallet();
display.Show("Вот " + chosen.Name);
totalBill = 0;
}
}