Solved

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

Posted on 2004-10-01
1
171 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
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
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

Introduction: Database storage, where is the exe actually on the disc? Playing a game selected randomly (how to generate random numbers).  Error trapping with try..catch to help the code run even if something goes wrong. Continuing from the seve…
Introduction: Dialogs (1) modal - maintaining the database. Continuing from the ninth article about sudoku.   You might have heard of modal and modeless dialogs.  Here with this Sudoku application will we use one of each type: a modal dialog …
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.
In this video, viewers are given an introduction to using the Windows 10 Snipping Tool, how to quickly locate it when it's needed and also how make it always available with a single click of a mouse button, by pinning it to the Desktop Task Bar. Int…

630 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