Posts by Salem

> would you be able to make me a basic program with an array that times
> 2 numbers from the array and shows it to the user
Why can't you create one, to explore the problem for yourself.
If you can get it to work, you might be able to figure out the answer to your bigger question.
If not, then at least you have something small to post here.

Which OS/Compiler do you have ?

Where is the printer connected to your PC, serial, parallel, USB, network?

You say printf, are we to assume some kind of console program?

Do a google search for "shunting yard algorithm".

> Increment and decrement operations will be only perform after the end of a sequence point
No, they happen at any point between sequence points (therein lies part of the problem).
http://c-faq.com/expr/evalorder2.html
http://c-faq.com/expr/seqpoints.html

> therefore the increment of the first a++ is unexpected an the second it would only happen afterwards;
Again, this is also misleading.
Given a = f() + g(); there is nothing in the standard which says that f() MUST be called first. So you can't be sure that the left hand side value (with its side-effect) is "evaluated" first.

http://www.daniweb.com/forums/thread99986.html
http://www.daniweb.com/forums/thread99863.html
http://www.daniweb.com/forums/thread99867.html
Guess what all these threads have in common?

Yes, that's right, they've all been " Last edited by moderator : 1 Day Ago at 01:46. Reason: Added CODE tags"

Did you even bother to read the link I posted?
Parentheses ONLY modify precedence, they do nothing to evaluation order.

http://www.catb.org/~esr/faqs/smart-questions.html#urgent
Then read the rest of the ASQ

1. Throw out your fossil compiler.

2. Get a modern compiler, like visual studio express, or one of the many IDE's of MinGW (bloodshed, code::blocks)

3. Learn the C++ language first, before thinking about specialising into some particular application area. It's all very well having grand ideas, but if you haven't gotten much further than "hello world" in the scope of your programming knowledge, then you're going to be disappointed.

4. Visit http://nehe.gamedev.net/

When you realise all such expressions are undefined, you can relax and get some sleep.
http://c-faq.com/expr/index.html

> But when i am assiging the result of that expressiion in any variable then i got 0 value
That's one of the hallmarks of undefined behaviour, change anything at all and the result changes for no good reason.

If someone is teaching you this stuff, they're an idiot.

In a loop which runs 12 times, you want

cin >> temps[0][col];  // this is max
cin >> temps[1][col];  // this is min

> Any Idea for a project in Web Aplications?
Well you could write a detector for useless bumps of dead threads on forums.

It seems the world is full of students incapable of independent thought.

Perhaps post your 'bt' trace?

57 64

Great, you've got your free cookie, but have you learnt anything in the process?

> I definitely never would have been able to do it on my own.
Sure you would, eventually.
But instead you're dazed by vijayan121 'brilliance' rather than building up your knowledge towards your own solution. Which whilst it might have been longer, used less C++ features, would have been YOUR solution and not someone else's.

Use a string stream to create a filename, like so.

#include <iostream>
#include <fstream>
#include <sstream>
using namespace std;

int main()
{
    ostringstream fname;
    int        T = 22;
    fname << "results.xls_" << T << ".xls";
    cout << fname.str() << endl;
    ofstream outfile(fname.str().c_str());
    outfile.close();
    return 0;
}

> The string i am sending is also not longer than 512 bytes.
But what about it's length after formatting?

Try something like

char temp_str[10000];
vsprintf(temp_str,arg,ap);
if ( strlen(temp_str) >= 512 ) {
  fprintf(stderr, "I was wrong\n" );
}

> Im using multiple threds , which calls this makeLog function.
If you linked with a multi-thread library, that shouldn't be a problem

When you say 'core dump', are you referring to the Linux/Unix core dump?
Because then you can load the core file into gdb and use the 'bt' command to give you a stack trace of where it stopped.

If that stack trace shows that vsprintf() was in turn calling malloc/free, then you have a much bigger problem to solve. You've trashed the memory pool and this is merely the symptom of the problem, not the cause of the problem.

Perhaps http://www.nondot.org/~sabre/os/articles/FileSystems/

How many more I wonder?

When you say "image", you're referring to a copy of all the sectors of information stored in the memory card right?

And not reciting the tale of someone told to make a copy of the floppy disk by putting it on the photocopier :)

> You must hand in your work by the 10th of December 2007 to the Undergraduate Office.
Please post the email address of your assessor so that we can be sure of timely delivery of the assignment to the correct place.

Did you see this thread at the top of the forum?
http://www.daniweb.com/forums/announcement118-3.html

Did you see the watermark at the back of the edit window?

Yeah, and this thread was 3 years old before assorted "chippies" came along with their "me too" responses.

What?

Write some code to read a .cap file, extract a frame and show usage of the bitwise operators to extract some information?

Go read your C book or some tutorials to find out how they work, then try to use them in your application. Then (or if) you get stuck, then you can post some code and we'll see if we can help you past your difficulties.

Yes I can help, but I'm not going to spend the next hour researching .cap files, saving a trace with ethereal and then writing some code just so you can grab it and say "tada, finished". It's your project, start pulling some weight.

> But then you're only willing to help people because you get points out of it
So we have now 4 "metrics" which tell the world how we're performing, yet none for those people asking the questions?

As you well know, I also help out on cprogramming.com, and there is no rep there at all, so I'm definitely not in it for the "points" as you put it.

If they have a high post count, they might have a clue.
If they have a high rep, they might have a clue.
If they have a high number of "solved" threads, they might have a clue.
If they've been here a long time, they might have a clue.

If none of this matters, why show it?

Sure, if "solved" is a metric, I'm going to be more interested in helping people who post with code tags in proper English, and give due recognition rather than some brain-dead semi-literate boob who doesn't give a damn so long as they get their free lunch.
We all have a limited time here, so I want to make sure that my effort is duly recognised.

One way is to "reward" those responsible posters by answering their questions
a) first
b) in more detail.
If I run out of time, then the also-rans will either have to wait, or improve. Without any incentive, why would they ever bother to …

Perhaps you should begin with some exercises which get you used to using these operators
^
&
|
>>
<<
~

Use fread() to read one or more bytes from the file,
Use the bitwise ops to extract the bit(s) which interest you.
Use the information in the file format specs to guide you.

Our normal definition of "help" is that you make an effort to produce some code, then we help you with whatever it is you're stuck on.

Your definition of "help" seems to be you post your assignment and then wait for someone else to do the work.
Read the intro threads - no free homework without some effort on your part.

So what's the problem?

Have you read the relevant documentation to learn about the .cap file format?

Are you able to open and read the file, and retrieve a packet?

Are you able to decode the header of that packet to determine it's purpose?

How about the other "incentive" of working out which people are worth helping?

If two posters have started 100 threads (say), where one of them has marked nearly all of them as "solved", and the other hasn't even bothered, then I'd like to know.

Well they need to be implemented SOMEWHERE.

My guess is since you've prefixed it with 'my', then it's your responsibility to implement it.

Look up pthread_exit() and pthread_join() for ways of communicating information from the thread back to the parent.

> Should I use structures?
Yes, it's certainly a lot more convenient than using lots of arrays.

Probably, but I really couldn't care less until either you or a mod fixes the post so that I can read it without going blind in the process.

Look at the "branch" bit coming out of the control bubble, and how that affects the MUX in the top right corner of the diagram.

And which processor / assembler are you thinking about?
This isn't the psychic programming network, we've no idea what you're referring to.

Sure, figuring out how to use code tags would be high on your list.
You were a lot closer than most people manage, but you still didn't make it.

So do you have a mywindow.cpp which implements the rest of the functionality of your class in mywindow.h ?

> this is urgently needed
I'm sure it is, but that isn't my problem.
http://www.catb.org/~esr/faqs/smart-questions.html#urgent

Nor am I interested in people in too big a hurry to read the forum rules, and completely ignore the copious references to USE CODE TAGS all over the forum.

So goto http://sourceforge.net and type "partition" into the search box.
Plenty of open source examples to get your head around.

You'll need a machine you won't mind trashing several times, because in your stumbling around in the dark, you will completely trash your HD and make it unbootable and unrecoverable.

http://clusty.com/search?query=PCB+cleaner

The first thing I would suggest you do is carefully remove the HD and put it in a really safe place, or find a similar machine to plug the HD into so you can get some backups done.

Observing correct ESD precautions whilst working would be paramount to avoid further damage.

The best bet would be to find someone who offers a "no fix, no fee" repair service, or at least gives you a free estimate up-front.

This should help you with your parallel port programming.
http://www.lvr.com/parport.htm

So there's nothing virtual about it, it's just hidden ?

Have you considered storing all your init data in an XML file instead?
There are libraries to support XML, and plenty of tools to deal with XML.

Gah, more cross-forum posting :icon_mad:

Not bad, apart from
- void main
- using conio.h
- using clrscr()
- using getch()

> for(i=0;i<=index;i++)
It should be <, not <= if you want to count 'index' elements (you start at 0, not 1).

How do you expect us to give you code, when you have the algorithm?

http://www.daniweb.com/forums/announcement118-3.html

Well there's this - http://www.daniweb.com/forums/announcement118-3.html
So that people might care enough to look at your code rather than just dismissing it as an unreadable mess.

Whenever you have an array, you need to be thinking about using a for loop as well.

Don't start multiple threads on essentially the same topic.

http://www.daniweb.com/forums/announcement8-3.html
So when you post code, it looks like this.

int main()
{
    int x, n=0;

And not like this.
int main()
{
int x, n=0;

> is there any way to make it shorter?
Of course there is, but that's not necessarily a good measure of "success" for a program. Doing the right thing, and being easy for the average programmer to comprehend without too much effort are good qualities to strive for IMO.
Coming up with some crazy one-liner might take me an hour, and you a few days to comprehend what's going on, but it still won't teach you anything.

> #include <iostream.h>
> #include <conio.h>
These are obsolete header files.

If your C++ compiler won't accept

#include <iostream>
using namespace std;

then you need to update to something more modern.