C# (CSharp) DiscountAB示例

示例#1

 public MoreThan500Discount(DiscountAB next)
 {
     nextDiscount = next;
 }

示例#2

 public NoDiscount(DiscountAB next)
 {
     nextDiscount = null;
 }

示例#3

 public FiveOrMoreDiscount(DiscountAB next)
 {
     nextDiscount = next;
 }