Solved

Linux: shared memory odd problem

Posted on 2009-05-08
6
747 Views
Last Modified: 2012-06-27
Hello
I hate ask long and odd questions but this problem make me really insane!!!!!!! please help me. I apologize you.

I coded a game in Linux and it works. (fireballs.cpp)
I decided to code it using shared memory and fork. (fork.cpp)
it works but Player class's Move function that should move player's shield, doesn't clear previously printed characters.

I hope help me

want to mention compilation command:
g++ fork.cpp -o fork.o -lpthread -lncurses -O2 (also for fireballs.cpp)

I apologize you again for my long and odd question. please help me
thank you very much
yours sincerely
fireballs.txt
fork.txt
0
Comment
Question by:CSecurity
[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
  • 3
  • 2
6 Comments
 
LVL 8

Accepted Solution

by:
eager earned 400 total points
ID: 24343939
Run your program under a debugger (gdb, for example) and step through the code which you expect to clear the characters.

It's a bit tricky to debug a program which forks, because the debugger will only follow the parent, not the child process.  One way around this is to print the PID for the child and have it sleep for a while, which will allow you enough time to attach to the child process.  
0
 
LVL 53

Assisted Solution

by:Infinity08
Infinity08 earned 100 total points
ID: 24352225
Maybe you should simply clear the screen before drawing in the main loop ?
0
 
LVL 53

Expert Comment

by:Infinity08
ID: 24480925
>> it's clear why!

No it's not :)

Do you still have a problem with this ? Did you try our suggestions ?
0
What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

 
LVL 17

Author Closing Comment

by:CSecurity
ID: 31579655
although you did not help me but giving you some point will happy me!
thank you very much for your comment
infinity, my friend, sorry!
0
 
LVL 53

Expert Comment

by:Infinity08
ID: 24481055
>> although you did not help me

If you want, we can help you further. There's no need to close the question if you don't have a solution. If you explain to us what the problem currently is, we'll be happy to assist you with that :)
0
 
LVL 17

Author Comment

by:CSecurity
ID: 24481348
my friend
my problem was so odd and hard to tell it to someone else, unfortunately!
so, now I don't want to fix the problem because I don't need the code anymore!
so, I apologize you anymore
regards
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

Setting up Secure Ubuntu server on VMware 1.      Insert the Ubuntu Server distribution CD or attach the ISO of the CD which is in the “Datastore”. Note that it is important to install the x64 edition on servers, not the X86 editions. 2.      Power on th…
This is a short and sweet, but (hopefully) to the point article. There seems to be some fundamental misunderstanding about the function prototype for the "main" function in C and C++, more specifically what type this function should return. I see so…
The goal of this video is to provide viewers with basic examples to understand and use conditional statements in the C programming language.
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

696 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