C / C++ / MFC

7-Jan-06 23:21

Do anyone know any online
c/c++ or vc++ question sites
where i can get some good
kicking questions

thank you
vikas
Cool | :cool:

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Prakash Nadar7-Jan-06 23:23

7-Jan-06 23:23

First kicking question!

do u know google?

and read this

-Prakash

-- modified at 5:24 Sunday 8th January, 2006

vikas amin8-Jan-06 0:07

8-Jan-06 0:07

Gle

My newly born
child who is 5 months old also knows it Poke tongue | ;-P

Vikas Amin
Embin Technology
Bombay

-- modified at 0:29 Monday 9th January, 2006 Dead | X|

Axter8-Jan-06 1:14

Axter

8-Jan-06 1:14

Check out the following links:
http://axter.com/CPP_Interview_questions.htm[^]

http://axter.com/Win32_Interview_questions.htm[^]

http://axter.com/C_interview_questions.htm[^]

The first link has more links listed at the bottom

Top ten member of C++ Expert Exchange.
http://www.experts-exchange.com/Cplusplus

vikas amin8-Jan-06 8:01

question about classes without data

8-Jan-06 8:01

thanks finally
i got some good stuff

Vikas Amin
Embin Technology
Bombay

CTreeCtrl::GetCheck()

LiYS7-Jan-06 21:03

LiYS

7-Jan-06 21:03

Hi all:

I have a tree control with checkbox inside dialog and I added the following message map:

ON_NOTIFY(NM_CLICK, IDC_TREE1, &CCheckBoxDlg::OnNMClickTree1)

And before the CCheckBoxDlg::OnNMClickTree1 finish. I've counted all the checked child items which belonging to specific parent. But it seems that the CTreeCtrl class doesn't take the items I've just check/unchecked into consideration before the NM_CLICK finish. In other words, I always get the item's previous check/uncheck value. How can I do my part after the check/uncheck default processing finished, but still inside NM_CLICK?

neodeaths7-Jan-06 20:10

neodeaths

7-Jan-06 20:10

i havea class in my local main int i am trying to make a for loop to look for a empty class to put my data in

grahpic_card gc[10];
int i;
for(i;i<10;i++)
{

if(gc[i].model=="")
{cin>>gc[i].model;}//by the way model is an char[50]

}

but this does not work since the object was created as a local is there any way to make this work?

Prakash Nadar7-Jan-06 21:12

7-Jan-06 21:12

I would like to suggest you to buy a good book on C++ and read it

-Prakash

vikas amin7-Jan-06 22:28

7-Jan-06 22:28

I suggest Bruce Eckel
yeh its and author name , i dont know if the spell is wrong.

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Prakash Nadar7-Jan-06 22:31

7-Jan-06 22:31

He needs it not me.

-Prakash

vikas amin7-Jan-06 23:02

7-Jan-06 23:02

Ok prakash

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Prakash Nadar7-Jan-06 22:32

BFFM_SETSELECTION question

7-Jan-06 22:32

http://www.janiry.com/bruce-eckel/[^]

-Prakash

nm_1147-Jan-06 19:51

7-Jan-06 19:51

The MSDN docs say "The path can be specified as a Unicode string or a PIDL" for the BFFM_SETSELECTION message (inside a BrowseCallbackProc function after calling SHBrowseForFolder), but when I send a Unicode string instead of an ansi one it fails. Is the documentation wrong?

Prakash Nadar7-Jan-06 21:16

7-Jan-06 21:16

Did you set the wParam as true?

-Prakash

nm_1148-Jan-06 6:28

8-Jan-06 6:28

yep, it works fine with an ansi string.

Prakash Nadar8-Jan-06 14:58

8-Jan-06 14:58

How are you sending the unicode string ? can you dump the section of code ?

-Prakash

nm_1148-Jan-06 17:01

8-Jan-06 17:01

if you uncomment the commented out lines it works fine in unicode builds but not ansi. it's being converted to unicode ok because OutputDebugStringW prints what it's supposed to.

int CALLBACK BrowseCallbackProc_SetInitFolder(HWND hWnd, UINT uMsg, LPARAM lParam, LPARAM lpData)
{
	if (uMsg == BFFM_INITIALIZED)
	{
//#ifdef UNICODE
		SendMessage(hWnd, BFFM_SETSELECTION, TRUE, lpData);
//#else
//		WCHAR sz[MAX_PATH];
//		MultiByteToWideChar(CP_ACP, 0, (LPTSTR)lpData, -1, sz, MAX_PATH);
//		OutputDebugStringW(sz);
//		SendMessage(hWnd, BFFM_SETSELECTION, TRUE, (LPARAM)sz);
//#endif
	}
	return 0;
}

Prakash Nadar8-Jan-06 17:36

8-Jan-06 17:36

In Ansi build you should NOT convert the string to Unicode while using windows APIs,

Check this link[^] and search for BFFM_SETSELECTION

The Microsoft documentation has a couple of minor errors I should point out in case you try to program SHBrowseForFolder in C. The documentation says to pass the string for BFFM_SETOKTEXT in WPARAM; actually, it's LPARAM. It also says that BFFM_SETSELECTION requires a Unicode string, but BFFM_SETSELECTION is available in both A and W flavors, so you can use LPCTSTR.

-Prakash

-- modified at 23:38 Sunday 8th January, 2006

nm_1148-Jan-06 18:40

Re: questions about pointers

8-Jan-06 18:40

Mr.Prakash wrote:
The Microsoft documentation has a couple of minor errors

ah, thats what i thought. thanks.

questions about pointers

neodeaths7-Jan-06 19:28

neodeaths

7-Jan-06 19:28

i was just wondering if this is possible?:

i have 2 class
and each of them i declared 10 object and 1 pointer:

grahpic_card gc[10],*ptr_gc;
mother_board mb[10],*ptr_mb;

is there a way i can store any one of the pointer in 1 pointer something like this

???? *ptr1;

instead of having to use 1 pointer for each of the class i would like to use 1 pointer for BOTH of the class is that possible if so please teach me how

Prakash Nadar7-Jan-06 20:58

Re: questions about pointers

7-Jan-06 20:58

You need some understanding of C++.

use a baseclass from which graphic_card and mother_board will be derived from.

for example

class Mother_board :public Base
and
class Graphic_card :public Base

Then
Base *base;
Mother_board *mBoard;
Graphic_card *gCard;

<<<assumeing that="" the="" mboard="" and="" gcard="" are="" initialed.="">>>

then

base = mBoard or <<< you can use reinterpret_cast too >>>
base = gCard is valid assignmnet.

add virtual or pure virtual methods in both base and derived class so that you can call the methods as base->foo();

-Prakash

vikas amin7-Jan-06 21:52

Re: questions about pointers

7-Jan-06 21:52

reinterprit_cast
is the key word
Cool | :cool:

but its not that simple
as u feel as c++ doesnot
like such type casting and
might lead u some error in
programe if reiterprit is not
used with proper cution .

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Prakash Nadar7-Jan-06 22:01