题目
阅读以下说明和 C++代码,填补代码中的空缺,将解答填入答题纸的对应栏内。 【说明】 在股票交易中,股票代理根据客户发出的股票操作指示进行股票的买卖操作。其类图如图5-1所示,相应的c++代码附后。图5-1 类图
【C++代码】 include <iostream> include <string> include <vector> using namespace std; class Stock { private: string name; int quantity; public: Stock(string name ,int quantity) { this->name= name;this->quantity = quantity; } void buy() { cout<<" [买进]股票名称: "<< name << ",数量: "<< quantity << endl;} void sell() { cout<<" [卖出]股票名称: " << name << ",数量:"<< quantity <<endl; } }; class Order { public: virtual void execute() = 0; }; classBuyStock: (1) { private: Stock* stock; public: BuyStock(Stock* stock) { (2) = stock; } void execute() { stock->buy () ; } }; //类SellStock的实现与BuyStock类似,此处略 c1ass Broker { private: vector < Order*> orderList; pub1ic: void takeOrder((3) order) { orderList.push_back(order);} void p1aceOrders() { for (inti=O; i<orderList.size(); i++) { (4) -> execute () ; } orderList.c1ear(); } }; c1ass StockCommand { pub1ic: void main () { Stock* aStock = new Stock("股票 A" ,10); Stock* bStock = new Stock("股票 B" ,20); Order* buyStockOrder = new BuyStock(aStock); Order* se11StockOrder = new Se11Stock(bStock); Broker* broker = new Broker(); broker->takeOrder(buyStockOrder); broker->takeOrder(se11StockOrder); broker-> (5) () ; } }; int main() { StockCommand* stockCommand = new StockCommand(); stockCommand->main(); de1ete stockCommand; }
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