C / C++ / MFC

Re: increasing the buffer allocatied for the application

16-Oct-07 2:57

What buffer are you referring to? Stack space, perhaps?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Kiran Pinjala16-Oct-07 19:09

Kiran Pinjala

16-Oct-07 19:09

Yes.I thing so. I was told that for every application running, a defult memory is allocated by the os. Is it like that?

KIRAN PINJARLA

Re: increasing the buffer allocatied for the application

David Crow17-Oct-07 4:12

17-Oct-07 4:12

The default stack size for a VS6 application is 1MB. I'm not sure if that has been changed in VS200x.

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Memory... [Solved]

Rage15-Oct-07 21:15

Rage

15-Oct-07 21:15

Thanks everybody, but I solved it by doing ... nothing. After a while staring at the code, I hit ... Rebuild, and it worked like a charm. Ahhh VC++6 and templates Roll eyes | :rolleyes:

Sorry for the hassle, thanks again for your answers.

-> Orignial post:

Here is my code:

// creation
	for(int i=0;i<3;i++)
	{
		BYTE *pbMessage= new BYTE[12];
		st.push(pbMessage);
	}

//deletion
	BYTE *pbTest;
	while(st.getSize()>0)
	{
		pbTest=st.pop();
		printf("%s\n",pbTest);
		delete[] pbTest;   /// <- Here an exception, shouldn't this work ?
	}

st is a sort of stack (which works). The push function saves the pointer, the pop function returns the pointer. How can I make the compiler understand that the pbTest points on 12 elements ?

BYTE pbTest[12];
pbTest=st.pop(); // does not work -> st.pop returns a BYTE*, pbTest is a BYTE[12]

Note that delete pbTest does not work either in the first example.

Thanks,

-- modified at 9:55 Tuesday 16th October, 2007

~RaGE();

I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus

Do not feed the troll ! - Common proverb

toxcct15-Oct-07 21:19

toxcct

15-Oct-07 21:19

pbTest is allocated as a BYTE *pbTest (not an array) so why would you free it using delete[] pbTest

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David Crow16-Oct-07 2:52

16-Oct-07 2:52

toxcct wrote:
...why would you free it using delete[] pbTest

Because it points to an array?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

toxcct16-Oct-07 2:56

toxcct

16-Oct-07 2:56

isn't delete[] useful only when the memory is allocated with new[] and simple delete useful when simple new used ?

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David Crow16-Oct-07 3:03

16-Oct-07 3:03

toxcct wrote:
isn't delete[] useful only when the memory is allocated with new[]

Yes, and that's what he has here:

BYTE *pbMessage= new BYTE[12];

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Nibu babu thomas15-Oct-07 21:37

Nibu babu thomas

15-Oct-07 21:37

Rage wrote:
Note that delete pbTest does not work either in the first example.

Is it throwing exception right from the first element in the loop while deleting? Are you sure pop is working correctly?

Nibu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http:\\nibuthomas.wordpress.com

Roger Stoltz15-Oct-07 22:50

Roger Stoltz

15-Oct-07 22:50

How is your "sort of stack" declared? Template argument, if any, and push/pop functions...
I wonder since the stack::pop() function of the usual STL stack is declared as void pop(), so you must be using something else. The equivalent function in the STL stack would be <YourType>& top().

If your pop() works like you think it should work, I can't see why you would get the exception...
But perhaps it's still too early in the morning for me... Sleepy | :zzz:

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Matthew Faithfull15-Oct-07 23:49

Matthew Faithfull

15-Oct-07 23:49

Hello again,
If that's one of my stacks you're adapting the chances are it takes the address of what you pass to it, so it would actually be storing a BYTE** in this case, requiring you to dereference the result of pop back to a BYTE* with something like BYTE* pData = *pPopResult. You definitely need to check this if you adapted one of my data structures. I tend to make containers store the addresses of contained items to avoid copying.
Remember BYTE[15] and BYTE* are the same type so delete [] pbTest is correct if pbTest is BYTE*. If it's BYTE** then it will be trying to delete an array of 4 byte BYTE* pointers hence the exception.
If the stack comes from elsewhere then feel free to ignore all this rambling. Smile | :)

Nothing is exactly what it seems but everything with seems can be unpicked.

Re: How to access all the Editboxes in a form.

Rage16-Oct-07 3:55

Rage

16-Oct-07 3:55

Thanks, but I only took a few ideas from your article, and the implementation is indeed different here.

~RaGE();

I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus

Do not feed the troll ! - Common proverb

Hamid_RT15-Oct-07 20:45

Re: How to access all the Editboxes in a form.

15-Oct-07 20:45

Yes you must check them else you have trouble code.

CodingLover15-Oct-07 21:00

CodingLover

15-Oct-07 21:00

Ok, thanks.

I appreciate your help all the time...
Eranga Smile | :)

Re: How to access all the Editboxes in a form.

Hamid_RT16-Oct-07 0:38

displaying the files and folders in a list box

16-Oct-07 0:38

You're welcome.;)

Chandrasekharan P15-Oct-07 20:42

Chandrasekharan P

15-Oct-07 20:42

now that i am displaying the designators in a combo box. i used recursive function to display that in the combo box. the next thing that i need to do is when i click on the designator the files and folders in that designator should display in a list box. what needs to be done for that?

chandru080

Hamid_RT15-Oct-07 20:47

15-Oct-07 20:47

Well it seems that this question is in the continue other question but do you want to show content a file on the listbox or other thing?

Chandrasekharan P15-Oct-07 22:10

Chandrasekharan P

15-Oct-07 22:10

yes it is. i need to shw the content of the directory in a list box. that is when i click on C: the folders and files of that c: should appear on the listbox. same goes to other directories also

Hamid_RT16-Oct-07 0:36

16-Oct-07 0:36

For show files and folders on the listbox you can use of DlgDirList function also you can use of FindFirstFile/FindNextFile.

Nelek15-Oct-07 20:47

Nelek

15-Oct-07 20:47

Take a look in the forum, there has been a similar question a few days ago

Greetings.

--------
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If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?

Help me to understand what I'm saying, and I'll explain it better to you

Wink | ;)

David Crow16-Oct-07 2:55

16-Oct-07 2:55

Nelek wrote:
...there has been a similar question a few days ago

And the posters share the same name. Amazing! Maybe that's why he started off by stating, "now that i am displaying the designators in a combo box."

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Chandrasekharan P16-Oct-07 17:29

Chandrasekharan P

16-Oct-07 17:29

something wrong in that usage??? well that was a continuation of a previous query. thought will start of with a new one..

David Crow17-Oct-07 3:56

17-Oct-07 3:56

Chandrasekharanp wrote:
something wrong in that usage???

No, I was just curious why Nelek did not associate the two posts were both from you.