C / C++ / MFC

26-Nov-10 3:49

void getPath(LPSTR lpszPath)
{
    CFile file;
    char pbuf[512];
    ...
    file.Read(pbuf, size);
    // here I wanna copy the first n chars of pbuf into lpszPath
}

So what can I do to manage it?
Maybe what has confused me is the different string data types....

Ahmed Charfeddine26-Nov-10 5:14

Ahmed Charfeddine

26-Nov-10 5:14

It is the same as if you were dealing with char* !

Have the habit of discovering what the definition of an unknwon type to you is. In this case you'll find it's just made from a typedef !

typedef CHAR *LPSTR;

Push Framework - now released !
http://www.pushframework.com

Krauze26-Nov-10 14:32

26-Nov-10 14:32

thx a lot

image processing toolkits | batch image processing

C^hris L^osinger26-Nov-10 5:15

C^hris L^osinger

26-Nov-10 5:15

LPSTR is a char*

typedef char* PSTR, *LPSTR;

Krauze26-Nov-10 14:33

26-Nov-10 14:33

many thx

yu-jian26-Nov-10 6:19

yu-jian

26-Nov-10 6:19

#include "stdafx.h"
#include <iostream>
#include "afx.h"

using namespace::std;

void getPath(LPSTR lpszPath, int max)
{
	char pbuf[512];

	LPCTSTR lpszFileName = _T("1.txt");
	CFile mFile(lpszFileName, CFile::modeRead | CFile::shareCompat);
	if(mFile.GetLength() < 2)
		return;

	mFile.Read(pbuf, 500);
	mFile.Close();
	memcpy(lpszPath, pbuf, 500);
}

int _tmain(int argc, _TCHAR* argv[])
{
	LPSTR lpstr = new char[2000];
	memset(lpstr, 0, 2000);
	getPath(lpstr, 2000);
	return 0;
}

我爸是李刚

Krauze26-Nov-10 14:33

26-Nov-10 14:33

thx for your detailed example

Black out the application.

yu-jian28-Nov-10 4:08

yu-jian

28-Nov-10 4:08

you are welcome.

Le@rner26-Nov-10 1:07

26-Nov-10 1:07

Hi all,

i dont know can can this happen,after running some time my application is fully black,no control or gui display here.

please tell me what can i do for this.

thanks in advance.

CPallini26-Nov-10 1:28

26-Nov-10 1:28

Please switch ON the monitor again.
Roll eyes | :rolleyes:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Le@rner26-Nov-10 1:30

26-Nov-10 1:30

monitor is on and other application are fine visible.

CPallini26-Nov-10 1:39

26-Nov-10 1:39

You maight read my answer this way:

You should elaborate: with the provided info we couldn't even guess what is happening with your application.

Luc Pattyn26-Nov-10 1:57

Luc Pattyn

26-Nov-10 1:57

With his monitor off, he can't read your advice anyway.

Confused | :confused:

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

CPallini26-Nov-10 2:04

26-Nov-10 2:04

Luc Pattyn wrote:
With his monitor off, he can't read your advice anyway.

The joke was on the line of: "dumb question -> dumb answer".

Smile | :)

non si direbbe

Luc Pattyn26-Nov-10 2:12

Luc Pattyn

26-Nov-10 2:12

you wouldn't say.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

Pourquoi pas?

CPallini26-Nov-10 2:18

26-Nov-10 2:18

Why not?

THIS IS AN INTERNATIONAL FORUM: PLEASE USE THE ENGLISH LANGUAGE HERE

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Que?

Luc Pattyn26-Nov-10 2:22

Luc Pattyn

26-Nov-10 2:22

if you intend to come up with a dumb answer for every dumb question, you will end up exhausting yourself.

WTF | :WTF:

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

Re: Que?

CPallini26-Nov-10 2:27

26-Nov-10 2:27

So please stop posting dumb questions... Big Grin | :-D

BTW: Sir, we're waiting for the bridge linking CP Vanity Lite with the real thing. Roll eyes | :rolleyes:

Richard MacCutchan26-Nov-10 2:50

Richard MacCutchan

26-Nov-10 2:50

Le@rner wrote:
please tell me what can i do for this.

Fix your program! Your question is far too vague for anyone to give you a solution. You need to do some investigations for yourself to try and determine what is happening in your code, and what part of it is not working correctly. Then present the information you have found and people will try to help you.

Just say 'NO' to evaluated arguments for diadic functions! Ash

Code-o-mat26-Nov-10 3:29

Code-o-mat

26-Nov-10 3:29

<BLINDSHOT>Maybe you are leaking GDI handles and run out of them after a while</BLINDSHOT>

Le@rner26-Nov-10 19:03

26-Nov-10 19:03

how can find out and recover that

Code-o-mat28-Nov-10 3:02

Code-o-mat

28-Nov-10 3:02

You can use a 3rd party software like "Process Explorer", i think that can show the number of GDI handles a process uses, if you see this number showing an increasing amount then you are most likely leaking GDI handles. How you can find where is up to you, i don't know of any particular automatic method for that. If you do any drawing yourself somewhere in your application, that's your best bet.

Alan Balkany1-Dec-10 5:16

Alan Balkany

1-Dec-10 5:16

If you have the source code for the application, try setting breakpoints to zero in on where the blackout is occurring. When you locate the exact statement that's doing it, it will probably tell you what the problem is.

Le@rner10-Dec-10 20:35