阅读下列说明和C++代码，回答下列问题。
[说明]
某咖啡店卖咖啡时，可以根据顾客的要求在其中加入各种配料，咖啡店会根据所加入的配料来计算费用。咖啡店所供应的咖啡及配料的种类和价格如表所示。
咖啡及配料的种类和价格
| 咖啡 | 价格/杯(￥) | | 配料 | 价格/份(￥) |
| 蒸馏咖啡(Espresso) | 25 | | 摩卡(Mocha) | 10 |
| 深度烘焙咖啡(DarkRoast) | 20 | | 奶泡(Whip) | 8 |
[C++代码]
#include ＜iostream＞
#include ＜string＞
using namespace std;
consr int ESPRESSO_PRICE = 25;
const int DRAKROAST_PRICE = 20;
const int MOCHA_PRICE = 10;
const int WHIP_PRICE = 8;
class Beverage //饮料
______: string description;
public: ______() return description;
______;;
class CondimentDecorator: public Beverage //配料
protected: ______;;
class Espresso: public Beverage //蒸馏咖啡
public:
Espresso () description="Espresso";
int cost () return ESPRESSO_PRICE;
;
class DarkRoast: public Beverage//深度烘培咖啡
public: DarkRoast() description = "DardRoast";
int cost() return DRAKROAST_PRICE;
;
class Mocha: public CondimentDecorator //摩卡
public: Mocha (Beverage*beverage) this-＞beverage=beverage;
string getDescription() return beverage-＞getDescription()+",Mocha";
int cost() return MOCHA_PRICE+beverage-＞cost();
;
class Whip: public CondimentDecorator //奶泡
public: Whip (Beverage*beverage) this-＞beverage=beverage;
string getDescription() return beverage-＞getDescription()+",Whip";
int cost() return WHIP_PRICE+beverage-＞cost();
int main()
Beverage* beverage = new DarkRoast() ;
beverage=new Mocha(______) ;
beverage=new Whip (______) ;
cout＜＜beverage-＞getDescription()＜＜"￥"＜＜beverage-＞cost() end1;
return 0;
编译运行上述程序，其输出结果为：DarkRoast，Mocha，Whip ￥38。
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