C / C++ / MFC Discussion Boards

Re: Console Application

parichaybp14-Apr-06 2:41

parichaybp

14-Apr-06 2:41

Thanks for the inforamtion.

it will help me a lot....

i will try to do that..

Re: Console Application

Maxwell Chen14-Apr-06 2:43

Maxwell Chen

14-Apr-06 2:43

It crashes at here:

} while (_findnext (File_handle, &file_s) == 0);<br />

Maxwell Chen

Re: Console Application

Stephen Hewitt14-Apr-06 21:20

Stephen Hewitt

14-Apr-06 21:20

Why implement a binary tree yourself? Use std::set or std::multiset. Then you get a self balancing binary tree instead of you home spun version which isn't self balancing and thus can degenerate to linear rather then logarithmic performance. Your program is written at an unnecessarily low level - A common mistake with C++ programmers, especially those with a background in C (in my opinion).

Steve

Re: Console Application

Maxwell Chen15-Apr-06 5:57

Maxwell Chen

15-Apr-06 5:57

Stephen Hewitt wrote:
Your program is written at an unnecessarily low level - A common mistake with C++ programmers, especially those with a background in C (in my opinion)

This is so true. It takes time for him to catch up this sense.

But maybe he hadn't known the existing one, std::set, to use.

Sometimes it might be of fun to code one's own toy (BTree in this case) to enjoy how it works.

Maxwell Chen

Re: Console Application

David Crow14-Apr-06 2:25

David Crow

14-Apr-06 2:25

Does the "crash" occur while adding nodes to the tree, printing the nodes, or scanning the folders? Please try to narrow it down a bit further so that we don't have to examine unnecessary code. You'll get much more help that way.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Console Application

parichaybp14-Apr-06 2:31

parichaybp

14-Apr-06 2:31

program does not produce any output i dnt knwo where it is getting generated.

Re: Console Application

Cedric Moonen14-Apr-06 2:35

Cedric Moonen

14-Apr-06 2:35

By following what I described in the thread just below. Use your debugger !

Re: Console Application

David Crow14-Apr-06 2:41

David Crow

14-Apr-06 2:41

But you mentioned a compiler error. What is it? It will be a 4-digit number preceded by a C.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Console Application

parichaybp14-Apr-06 2:43

parichaybp

14-Apr-06 2:43

This instruction at "0X77f8910e" referenced memory at "0xc7c7cf0".The memory could not be "read".

Re: Console Application

David Crow14-Apr-06 2:46

David Crow

14-Apr-06 2:46

That's a run-time error, not a compilation error. There's a big difference between the two.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Console Application

David Crow14-Apr-06 3:00

David Crow

14-Apr-06 3:00

parichaybp wrote:
while (fscanf(fp, "%s", &words)!= -1) //while not the end of the file

fscanf() can also return 0, which indicates a potential problem, but the while loop would continue. Is this intentional?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Console Application

David Crow14-Apr-06 3:04

David Crow

14-Apr-06 3:04

parichaybp wrote:
root1 = addtree (root1, words);

Why do you keep reassigning a new value to root1? That variable should point to the root of the tree no matter what.

parichaybp wrote:
#define MAX_LEN 100

Paths can be longer than 100 characters. Use MAX_PATH instead.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Console Application

David Crow14-Apr-06 3:07

David Crow

14-Apr-06 3:07

parichaybp wrote:
if (strcmp (file_s.name, ".") == 0 || strcmp (file_s.name, "..") == 0)

This can be shortened to just a single comparison:

if (file_s.name[0] == '.')

This does nothing for your problem, but it does help to remove unnecessary code.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Console Application

David Crow14-Apr-06 3:10

David Crow

14-Apr-06 3:10

Have you tried just navigating through the files/folders without adding anything to the tree data structure?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Console Application

Cedric Moonen14-Apr-06 2:02

Cedric Moonen

14-Apr-06 2:02

Geez... Why don't you use the debugger for that purpose ? It is the purpose of such a tool and it is much more helpfull (and faster) than posting a message on a forum.
We cannot tell the problem just by what you posted (and don't post the complete code because the problem will be the same).

Start your debugger (press F5) and see where it crashes. You can look through the call stack windows to see in which function it crashes. You can also set breakpoints (F9) to step into your code to see where it crashes.

Re: Console Application

Aqueel14-Apr-06 2:07

Aqueel

14-Apr-06 2:07

This is the think that should be done before posting your coding problem on codeproject. This helps alot... Smile | :)

We Believe in Excellence
www.aqueelmirza.cjb.net

Re: Console Application

Maxwell Chen14-Apr-06 3:12

Maxwell Chen

14-Apr-06 3:12

It crashes at here:
} while (_findnext (File_handle, &file_s) == 0);

Maxwell Chen

Re: Console Application

parichaybp16-Apr-06 19:28

parichaybp

16-Apr-06 19:28

Hi,

Can u plz tell me how to correct the error??

diff between Send message and Post message

Krishnatv14-Apr-06 0:59

Krishnatv

14-Apr-06 0:59

hai,
I dont know the difference between what is the SendMessage and PostMessage and Difference between SendMessage and Postmessage.

Krishna

Re: diff between Send message and Post message

HakunaMatada14-Apr-06 1:33

HakunaMatada

14-Apr-06 1:33

It can be said that SendMessage is Synchronous in nature and PostMessage is Asynchronous in nature.

Check out this[^] and this[^]

Please google before posting a question. Smile | :)

---
With best regards,
A Manchester United Fan

The Genius of a true fool is that he can mess up a foolproof plan!

Re: diff between Send message and Post message

Amar Sutar14-Apr-06 2:55

Amar Sutar

14-Apr-06 2:55

SendMessage(..)

The SendMessage function sends the message to a window or windows. It calls the window procedure for the specified window and does not return until the window procedure has processed the message.

PostMessage(..)

The PostMessage function places a message in the message queue associated with the thread that created the specified window and returns without waiting for the thread to process the message.

For more information search on the following site with SendMessage:

http://www.msdn.microsoft.com

Regards
Amar Smile | :)

Re: diff between Send message and Post message

Russell^'14-Apr-06 3:26

Russell^'

14-Apr-06 3:26

I can give you an example to understand when use the functions:
If you want that an object (CWnd) close itself without problems, probally the best solution is Postmessage(WM_CLOSE). Elseway if in a member (of this object) function you use Sendmessage the object will be destroyed before that the function ends, and it is probable that after Sendmessage some operations will be done on the members of this object. So this is a cause of a crash.

Have a nice code day Wink | ;)

-- modified at 9:27 Friday 14th April, 2006

Tree View Right Click Problem.

harshandu14-Apr-06 0:57

harshandu

14-Apr-06 0:57

Having problems about right clicking on an item in a tree control. The item
that is clicked on is not the right one.
If I have three items in a tree.
Here is my problem. I click on the first item with normal click. I click on
the third item with the right click mouse. In this event I had a messagebox
telling me which item is selected, and this one comes out with the first
item no mather what. I also tried to get into the OnSelchangedItemfieldtree
function - but with no luck.

How can I right click on the third one and get its name out of it? Does
anyone know?

More relaxed the person,high is his status.

Re: Tree View Right Click Problem.

Amar Sutar14-Apr-06 2:48

Amar Sutar

14-Apr-06 2:48

For handling right click override Tree control's OnRButtonDown.
In this function HitTest with the point so that u will get the selected item and then use GetItemText to get name of the item.

void CExplorerView::OnRButtonDown(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default

// To get selected item
HTREEITEM hTreeItem = GetTreeCtrl().HitTest(point);

GetTreeCtrl().SelectItem(hTreeItem);

CString cstrItemText = GetTreeCtrl().GetItemText(hTreeItem);

CTreeView::OnRButtonDown(nFlags, point);
}

Regards

Amar Smile | :)

how to read .PST file using VC++

K. narasimharao14-Apr-06 0:40

K. narasimharao

14-Apr-06 0:40

I am unable to read .PST files using VC++. I am developing an application like Outlook.
In that I have to read the outlook mails into my application. Please give any suggesstions.

knarasimharao

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