C / C++ / MFC Discussion Boards

Re: Why does this simple dynamic array experiment crash?

RockyJames29-Mar-06 21:03

RockyJames

29-Mar-06 21:03

Hey when i tried it is working up to n=980.
anything more than 980 application is crashing.

Re: Why does this simple dynamic array experiment crash?

Cristoff29-Mar-06 21:33

Cristoff

29-Mar-06 21:33

What compiler? I'm using mingw on WinXP Home right now but I could try it later on VS2005 and GCC under Linux but I have to reboot.

This is a text book example. Well I've change it a little bit but it is basically the same.

Re: Why does this simple dynamic array experiment crash?

Taka Muraoka29-Mar-06 21:37

Taka Muraoka

29-Mar-06 21:37

Your array variable is a pointer to int's but you're only allocating enough memory for n char's. char's are smaller than int's so you're running past the end of the memory you've allocated.

0 bottles of beer on the wall, 0 bottles of beer, you take 1 down, pass it around, 4294967295 bottles of beer on the wall.

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Re: Why does this simple dynamic array experiment crash?

Cristoff29-Mar-06 21:53

Cristoff

29-Mar-06 21:53

damn't it

sorry for the stupid question!

Re: Why does this simple dynamic array experiment crash?

Cristoff29-Mar-06 21:55

Cristoff

29-Mar-06 21:55

Damn't it

Sorry for the stupid question! I'm ashamed!

Re: Why does this simple dynamic array experiment crash?

Taka Muraoka30-Mar-06 3:47

Taka Muraoka

30-Mar-06 3:47

Cristoff wrote:
orry for the stupid question!

Hey, we've all done it. Just be grateful you did here instead of when iterating through thousands of bank account balances Smile | :)

0 bottles of beer on the wall, 0 bottles of beer, you take 1 down, pass it around, 4294967295 bottles of beer on the wall.

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Check box background color

snir_ya29-Mar-06 20:42

snir_ya

29-Mar-06 20:42

Hi,

I'm using a CButton as a check box in my application.
The background of the window on which this button "sits" is white.
When the check box is created it has a grey background no its rect.

Do you know how to control the background color?
Thanks.

Snir

Re: Check box background color

RockyJames29-Mar-06 21:05

RockyJames

29-Mar-06 21:05

use :

afx_msg HBRUSH OnCtlColor( CDC* pDC, CWnd* pWnd, UINT nCtlColor );

Re: Check box background color

Nibu babu thomas29-Mar-06 22:17

Nibu babu thomas

29-Mar-06 22:17

RockyJames wrote:
use :

afx_msg HBRUSH OnCtlColor( CDC* pDC, CWnd* pWnd, UINT nCtlColor );

This doesn't work with CButton.

Nibu thomas
Software Developer

Re: Check box background color

snir_ya29-Mar-06 22:29

snir_ya

29-Mar-06 22:29

No it doesn't. Thanks.
Do you have an alternative?

Re: Check box background color

snir_ya29-Mar-06 22:38

snir_ya

29-Mar-06 22:38

I'm using the the check box on a window and not a dialog. The window color is white. The default check box color is (dialog-like) grey.

Re: Check box background color

snir_ya29-Mar-06 22:59

snir_ya

29-Mar-06 22:59

O.k so i've got it.
I've used afx_msg HBRUSH OnCtlColor( CDC* pDC, CWnd* pWnd, UINT nCtlColor );
just like RockyJames suggested (cheers mate!:->)
and in the body just:
return (HBRUSH)GetStockObject(WHITE_BRUSH);

:->

Re: Check box background color

Hamid_RT30-Mar-06 0:48

Hamid_RT

30-Mar-06 0:48

Hi snir_ya,
I suggestion you can derived CButton and use WM_DRAWITEM
that you can change background color and other...

Re: Check box background color

snir_ya30-Mar-06 0:54

snir_ya

30-Mar-06 0:54

Thanks whiteSky - you've helped me before. It's a standrd checkbox. No special effects and stuff only it sits on a white window and it's defualt color is grey.
Anyway i've solved with the white brush:
HBRUSH OnCtlColor( CDC* pDC, CWnd* pWnd, UINT ctlColor )
{
return (HBRUSH)GetStockObject(WHITE_BRUSH);
}

Re: Check box background color

Hamid_RT30-Mar-06 1:30

Hamid_RT

30-Mar-06 1:30

http://www.codeproject.com/buttonctrl/CCheckSK.asp[^]

Linked list problem

sheepdonkey29-Mar-06 20:40

sheepdonkey

29-Mar-06 20:40

Hi,

I have created a class for implementing a doubly linked list. The problem I having is when I'm inserting a new node into the list.

First off, in a function in my class, I create a temporary node and copy the data into it like so:

<br />
PNODE pTempNode;<br />
pTempNode = new NODE;<br />
pTempNode->pNext = NULL;<br />
pTempNode->pPrev = NULL;<br />
pTempNode->pData = new double[dataSize];<br />
<br />
//fill with data<br />
<br />
pTempList->Insert(pTempNode);  // Pass the node to insert into the list<br />

The insert function then adds this node to the list like so:

<br />
if(pHead == NULL)	//	If there is no nodes in the list<br />
{<br />
	pHead = pNew;<br />
	pTail = pNew;<br />
	return;<br />
}<br />
else<br />
{<br />
        // (code not included for question)<br />
        // find a place to insert based on a condition<br />
<br />
        pPrev->pNext = pNew;<br />
	pNew->pNext = pCurr;<br />
	pNew->pPrev = pPrev;<br />
<br />
}<br />

Problem is though the head always changes to the new node I pass before I have passed it so the new node is not replacing the head.

Thanks for any help and I hope this makes sense!

Dave

Re: Linked list problem

benjymous29-Mar-06 21:21

benjymous

29-Mar-06 21:21

sheepdonkey wrote:
so the new node is not replacing the head.

You don't seem to be re-assigning your pHead pointer, so pHead will continue to point to the original head of the list (the first item you added)

--
Help me! I'm turning into a grapefruit!
Buzzwords!

Re: Linked list problem

sheepdonkey29-Mar-06 22:39

sheepdonkey

29-Mar-06 22:39

Thanks,

Pointers are my downfall I don't understand them fully!

How would I re-assign a pointer?

Re: Linked list problem

Rage29-Mar-06 23:56

Rage

29-Mar-06 23:56

pHead=pNew ?

~RaGE();

Creating DLL to automate MSword

KongHL29-Mar-06 20:38

KongHL

29-Mar-06 20:38

Is is possible to create DLL to automate MSword?
I have done exe version and it works fine but when developing the dll,

if(!WdocApp.CreateDispatch(_T("Word.Application")))
{
AfxMessageBox(_T("Could Not Create The Application Object"));
return false;
}

it is unable to createdispatch and exited ... y???
thks

Re: Creating DLL to automate MSword

Ganesh_T29-Mar-06 22:00

Ganesh_T

29-Mar-06 22:00

You can try to create the CON Addin for Microsoft Addin.

Cheers
"Peace of mind through Technology"

Is there any way to make single exception handler?

dmivlad29-Mar-06 20:02

dmivlad

29-Mar-06 20:02

Hello!

I've got a problem.
I want to do a single exception handler in my MFC application.
It should work the following way. At any place of my project
I can write: trow e (where e is the object of my Exception class).
And my single exception handler must catch this exception (so the
block try catch would be written only once).

Thanks for any help!

Re: Is there any way to make single exception handler?

Stephen Hewitt29-Mar-06 20:15

Stephen Hewitt

29-Mar-06 20:15

Simply catch the excpetion on your "main" function. i.e.

int main()
{
     try
     {
         YourRealCode();
     }
     catch (const std::exception &e)
     {
         // Do other stuff here.
     }

Steve

Re: Is there any way to make single exception handler?

Cedric Moonen29-Mar-06 20:21

Cedric Moonen

29-Mar-06 20:21

No, this is an MFC application so you don't have access to the "main" fuction.

Re: Is there any way to make single exception handler?

dmivlad29-Mar-06 20:22

dmivlad

29-Mar-06 20:22

This is a good way. But the problem is that my application doesn't have
main function because it is MFC application.

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