摘要: //向基类构造函数传递实参p491 class Bulk_item : public Item_base{public: Bulk_item(const std::string& book,double sales_price,std::size_t qty = 0,double disc_... 阅读全文
posted @ 2016-01-21 20:55 dangeal 阅读(257) 评论(0) 推荐(0) 编辑