📄 itemiterator.h.html

📁 《Big C++ 》Third Edition电子书和代码全集-Part1

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	<title>itemiterator.h</title>
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<pre>  1  #ifndef ITEMITERATOR_H
  2  #define ITEMITERATOR_H
  3  
  4  #include &lt;vector&gt;
  5  #include "item.h"
  6  
  7  <font color='#0000cc'>/**
  8     An iterator through a collection of items
  9  */</font>
 10  class ItemIterator
 11  {
 12  public:
 13     <font color='#0000cc'>/**
 14        Constructs the iterator from a vector.
 15        @param its a reference to a vector of Item pointers
 16     */</font>
 17     ItemIterator(vector&lt;Item*&gt;&amp; its);
 18     <font color='#0000cc'>/**
 19        Gets the current item.
 20        @return the current item pointer
 21     */</font>
 22     Item* get() const;
 23     <font color='#0000cc'>/**
 24        Advances to the next item.
 25     */</font>
 26     void next();
 27     <font color='#0000cc'>/**
 28        Tests whether there are more items.
 29        @return true if no more items are available.
 30     */</font>
 31     bool is_done() const;
 32  private:
 33     const vector&lt;Item*&gt;&amp; items;
 34     int pos;
 35  };
 36  
 37  inline void ItemIterator::next()
 38  {
 39     pos++;
 40  }
 41  
 42  #endif</pre>
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