📄 inventory.cpp.html

📁 《Big C++ 》Third Edition电子书和代码全集-Part1
💻 HTML
字号:
<html>

<head>
	<title>inventory.cpp</title>
</head>

<body>
<pre>  1  #include &lt;iostream&gt;
  2  #include &lt;list&gt;
  3  
  4  using namespace std;
  5  
  <font color="#0000cc">6  /**
  7     Describes a product by identification number.
  8  */</font>
  9  class Product
 10  {
 11  public:
 12     Product(int id = 0);
 <font color="#0000cc">13     /**
 14        Gets the product identification number
 15        @return the identification number
 16     */</font>
 17     int get_id() const;
 18  private:
 19     int identification_number;
 20  };
 21  
 22  inline int Product::get_id() const
 23  {
 24     return identification_number;
 25  }
 26  
 27  inline ostream&amp; operator&lt;&lt;(ostream&amp; out, const Product&amp; p)
 28  {
 29     out &lt;&lt; "Product " &lt;&lt; p.get_id();
 30     return out;
 31  }
 32  
 33  inline Product::Product(int id)
 34  {
 35     identification_number = id;
 36  }
 37  
 <font color="#0000cc">38  /**
 39     Maintains an inventory list of products on hand and back orders.
 40  */</font>
 41  class Inventory
 42  {
 43  public:
 <font color="#0000cc">44     /**
 45        Processes an order for a product with a given number.
 46        @param pid product id number
 47     */</font>
 48     void order(int pid);
 49  
 <font color="#0000cc">50     /**
 51        Processes receipt of shipment for a product.
 52        @param newp new product
 53     */</font>
 54     void receive(const Product&amp; newp);
 55  private:
 56     list&lt;Product&gt; on_hand;
 57     list&lt;int&gt; on_order;
 58  };
 59  
 60  void Inventory::order(int pid)
 61  {
 62     cout &lt;&lt; "Received order for product " &lt;&lt; pid &lt;&lt; "\n";
 63     list&lt;Product&gt;::iterator we_have = on_hand.begin();
 64     while (we_have != on_hand.end()) 
 65     {
 66        if (we_have-&gt;get_id() == pid)
 67        {
 68           <font color="#000099">// Have it, ship</font>
 69           cout &lt;&lt; "Ship " &lt;&lt; *we_have &lt;&lt; "\n";
 70           on_hand.erase(we_have);
 71           return;
 72        }
 73        ++we_have;
 74     }
 75     <font color="#000099">// Don't have it, back order</font>
 76     cout &lt;&lt; "Back order product " &lt;&lt; pid &lt;&lt; "\n";
 77     on_order.push_back(pid);
 78  }
 79  
 80  void Inventory::receive(const Product&amp; newp)
 81  {
 82     cout &lt;&lt; "Received shipment of product " &lt;&lt; newp &lt;&lt; "\n";
 83     list&lt;int&gt;::iterator we_need = 
 84        find(on_order.begin(), on_order.end(), newp.get_id());
 85     if (we_need != on_order.end())
 86     {
 87        cout &lt;&lt; "Ship " &lt;&lt; newp &lt;&lt; " to fill back order\n";
 88        on_order.erase(we_need);
 89     }
 90     else
 91        on_hand.push_front(newp);
 92  }
 93  
 94  int main()
 95  {
 96     Inventory inv;
 97     inv.receive(Product(37));
 98     inv.receive(Product(14));
 99     inv.order(37);
100     inv.order(37);
101     inv.receive(Product(21));
102     inv.order(14);
103     inv.receive(Product(37));
104     return 0;
105  }</pre>
</body>
</html>
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -