public string GetInfo(DiscountCard card)
{
StringBuilder sb = new StringBuilder();
sb.AppendLine($"Purchase value: ${card.PurchaseValue:f2}");
sb.AppendLine($"Discount rate: {card.DiscountRate}%");
sb.AppendLine($"Discount: ${card.Discount:f2}");
sb.AppendLine($"Total: ${(card.PurchaseValue - card.Discount):f2}");
return(sb.ToString().Trim());
}
public PayDesk(DiscountCard card)
{
this.card = card;
}
public Purchase(decimal price, DiscountCard discount)
{
this.Price = price;
this.Discount = discount;
}
