Solved

Why does't this work. faint.........about priority_queue

Posted on 2004-10-01
1
169 Views
Last Modified: 2013-11-20
I save a sample Struct

struct Packet
{
  unsigned int      l_Priority  : 5;       
  unsigned int      CRC        : 8;
 
  bool operator < (Packet* msg) const      
  {
        return l_Priority < msg->l_Priority ;
  }
  bool operator > (Packet* msg) const      
  {                   
        return l_Priority > msg->l_Priority ;
  }
};
in a priority_queue
 typedef std::priority_queue <const Packet*> Msg_Queue;
but it not works!!
I try to excute following test code
      Packet* p1;
      Packet* p2;

      p1 = new Packet();
      p2 = new Packet();

      p1->l_Priority = 1;
      p2->l_Priority = 3;

      if (p1 > p2)
            printf("p1 > p2\n");
      else
            printf("p1 < p2\n");
the result seems always p1 > p2, even though p1->l_Priority < p1->l_Priority
0
Comment
Question by:reneschy
1 Comment
 
LVL 55

Accepted Solution

by:
Jaime Olivares earned 20 total points
ID: 12205442
Try with this:

struct Packet
{
  unsigned int     l_Priority  : 5;      
  unsigned int     CRC      : 8;
 
  bool operator < (Packet& msg) const    
  {
       return l_Priority < msg.l_Priority ;
  }
  bool operator > (Packet& msg) const    
  {                
       return l_Priority > msg.l_Priority ;
  }
};

int main()
{
     Packet* p1;
     Packet* p2;

     p1 = new Packet();
     p2 = new Packet();

     p1->l_Priority = 1;
     p2->l_Priority = 3;

     if (*p1 > *p2)
          printf("p1 > p2\n");
     else
          printf("p1 < p2\n");
     system ("Pause");
     return 0;
 }    
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Is it possible to combine several text files into one big one? (redhat v5 enterprise) 4 110
lucky13 challenge 11 158
canBalance challenge 34 104
wordmultiple challenge 12 155
In this article, I'll describe -- and show pictures of -- some of the significant additions that have been made available to programmers in the MFC Feature Pack for Visual C++ 2008.  These same feature are in the MFC libraries that come with Visual …
Introduction: Dynamic window placements and drawing on a form, simple usage of windows registry as a storage place for information. Continuing from the first article about sudoku.  There we have designed the application and put a lot of user int…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…

761 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question