📄 mailbox.cpp.html

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

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	<title>mailbox.cpp</title>
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<pre>  1  #include "message.h"
  2  #include "mailbox.h"
  3  
  4  Message* Mailbox::get_current_message() const
  5  {
  6     if (new_messages.size() &gt; 0)
  7        return new_messages.front();
  8     if (kept_messages.size() &gt; 0)
  9        return kept_messages.front();
 10     return NULL;
 11  }
 12  
 13  void Mailbox::remove_current_message()
 14  {
 15     if (new_messages.size() &gt; 0) 
 16     {
 17        Message* m = get_current_message();
 18        new_messages.pop();
 19        delete m;
 20     }
 21     else if (kept_messages.size() &gt; 0)
 22     {
 23        Message* m = get_current_message();
 24        kept_messages.pop();
 25        delete m;
 26     }
 27  }
 28  
 29  void Mailbox::save_current_message()
 30  {
 31     Message* m = get_current_message();
 32     if (m != NULL)
 33     {
 34        kept_messages.push(new Message(*m));
 35        remove_current_message();
 36     }
 37  }</pre>
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