C / C++ / MFC Discussion Boards

Gary R. Wheeler8-Apr-06 12:50

8-Apr-06 12:50

I'll take a slightly different tack from the other responses.

Try checking out the IcmpSendEcho[^] function in the IP Helper library. This performs a 'ping' for you, and you don't have to worry about running a separate program.

Software Zen: delete this;

Fold With Us![^]

about VSS

FlyWithYou7-Apr-06 19:25

FlyWithYou

7-Apr-06 19:25

Hello.

1.How to modification VSS label or VSS comment in VS.NET 2003?

2.how VSS auto add the keyword on check in?

$Archive: /1.cpp $
$Revision: 5 $
$Date: 12/02/06 10:22 $
$Author: none $

Thanks.

searching files

RabiaAslam7-Apr-06 18:09

RabiaAslam

7-Apr-06 18:09

hi.....
i want to know how to search a file for a keyword. the problem that i am facing is that the file may be of any extension i.e. .doc, .txt, .html, .ppt etc......\
is there any way to do so......as some search engine searches for files..
plz guide me according to MFC...thanx

RabiaAslam

Re: searching files

Hamid_RT7-Apr-06 18:45

Hamid_RT

7-Apr-06 18:45

Hi RabiaAslam,
if you want to searches a directory for a file use FindFirstFile

Re: searching files

Aqueel7-Apr-06 19:10

Aqueel

7-Apr-06 19:10

Assalamoalaikum
Rabia!
Your question has some ambiquity. Do you want to search a file or search a word in a specific file?
Explain exactly what do you want to do?

Good luck

We Believe in Excellence
www.aqueelmirza.cjb.net

Re: searching files

RabiaAslam8-Apr-06 0:00

RabiaAslam

8-Apr-06 0:00

yes u got the right point ... i want to search for a word in s specific file

RabiaAslam

Re: searching files

Hamid_RT8-Apr-06 1:49

Hamid_RT

8-Apr-06 1:49

RabiaAslam,

so maybe it is some helpful to you
http://www.codeproject.com/file/scanr.asp[^]

Re: searching files

ThatsAlok7-Apr-06 19:38

ThatsAlok

7-Apr-06 19:38

RabiaAslam wrote:
is there any way to do so......as some search engine searches for files..plz guide me according to MFC...thanx

you can try CFileFind Class or have a look at this article :- http://www.codeproject.com/file/cfilefinderex.asp[^]

Re: searching files

ThatsAlok7-Apr-06 19:40

ThatsAlok

7-Apr-06 19:40

RabiaAslam wrote:
s there any way to do so......as some search engine searches for files..plz guide me according to MFC...thanx

what about CFileFind or have a look at this article :-
http://www.codeproject.com/file/cfilefinderex.asp

Re: searching files

Hamid_RT7-Apr-06 19:45

Hamid_RT

7-Apr-06 19:45

or http://www.codeproject.com/dialog/searchfolders.asp[^]

Re: searching files

Aqueel7-Apr-06 19:59

Aqueel

7-Apr-06 19:59

Assalamoalaikum
Rabia!
if you want to search a word within a file, this class by James Moody will help you.
http://www.codeguru.com/cpp/cpp/cpp_mfc/article.php/c4037/[^]
Good luck

We Believe in Excellence
www.aqueelmirza.cjb.net

Balanced Binary Trees

TranscendentalSoftware7-Apr-06 17:39

TranscendentalSoftware

7-Apr-06 17:39

For the source code to 5 different kinds of balanced binary trees see http://www.5trees.com. Please enjoy.

5Trees

Re: Balanced Binary Trees

El Corazon7-Apr-06 20:09

El Corazon

7-Apr-06 20:09

what if we want an optimized imbalanced binary tree? (otherwise known as a splay tree) I do normally use AVL trees, but not always. Smile | :)

_________________________
Asu no koto o ieba, tenjo de nezumi ga warau.
Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)

Re: Balanced Binary Trees

TranscendentalSoftware7-Apr-06 20:21

TranscendentalSoftware

7-Apr-06 20:21

Jeffry J. Brickley wrote:
what if we want an optimized imbalanced binary tree? (otherwise known as a splay tree) I do normally use AVL trees, but not always.

I have looked at splay trees but I have not researched them in depth. Personally I am very fond of the original AVL Algorithms. AVL algorithms are rock solid and may be applied to finite ordered sets, dynamic arrays, maps and tables (see http://www.5trees.com for definitions of these terms). I intend to stick with AVL trees rather than research on Splay Trees or RedBlack Trees - I'll leave that to others. Interestingly, the STL standard for Maps uses RedBlack Trees. 5Trees uses AVL to implement associative arrays.

Cheers,
Ben.

5Trees

Re: Balanced Binary Trees

Blake Miller10-Apr-06 5:15

Blake Miller

10-Apr-06 5:15

I favor Ternary Search Trees.

People that start writing code immediately are programmers (or hackers), people that ask questions first are Software Engineers - Graham Shanks

CAsyncSocket Question

JBAK_CP7-Apr-06 14:30

JBAK_CP

7-Apr-06 14:30

Hi I'm using a CAsyncSocket to create a TCP socket and connect to a server. Everytime I connect, the error code I get is a WSAEWOULDBLOCK, whether the server is there or not. So, the only way I know if I am connected or not is to send a message to the server, and I have to look to see if I have a send error of WSAENOTCONN to determine if my connection was a success or not. Is there any way, to know if I am really connected or not when I try to do a 'connect', instead of the approach that I'm taking right now?

Thank you,

//Code
m_pSock.Create(); //Create the socket
if (!m_pSock.Connect(IP, PORT))
{
DWORD error1 = GetLastError();
if(error1 == WSAEWOULDBLOCK)
{
iSent = m_pSock.Send((void *)messages[0],32);
if(iSent == SOCKET_ERROR)
{
DWORD error2 = GetLastError();
if(error2 == WSAENOTCONN )
{
MessageBox("SOCKET NOT CONNECTED",NULL,NULL);
}
}
}
}

-- modified at 20:30 Friday 7th April, 2006

Re: CAsyncSocket Question

Mike O'Neill8-Apr-06 8:00

Mike O'Neill

8-Apr-06 8:00

The mistake you're making is that you are trying to use asynchronous sockets synchronously.

In synchronous sockets, you tell the socket what to do, step by step.

In asynchronous sockets, the socket tells you that it's ready to do something, and then you tell it to try.

If an asynchronous socket can't do what you tell it to, then it returns SOCKET_ERROR and WSAGetLastError returns WSAEWOULDBLOCK. This signifies that the requested operation cannot be performed without blocking (which you don't want), and that the socket will tell you later, when it's ready, to try again. Then, later (and asynchronously), the socket will send an FD_CONNECT message to your message loop (or something similar, like FD_READ, depending on circumstances), which eventually filters down to your override of the virtual OnConnect function.

So, WSAEWOULDBLOCK is very common and must be programmed for. In your case, you start the whole process by calling Connect. If it succeeds, then great, do the next thing. But it probably will fail with WSAEWOULDBLOCK. In this case, at some later time in the future, your OnConnect function will be called, signifying that the socket is ready for you to try again. Inside OnConnect, try calling Connect again, but again be ready for the (much lowered) possibility that WSAEWOULDBLOCK might be returned again.

You need to do this for each significant event that you are interested in, like OnReceive, OnSend, OnClose etc.

Mike

How to display series of numbers ?

Surivevoli7-Apr-06 13:04

Surivevoli

7-Apr-06 13:04

I want to display series of numbers from 1 to 50 (that handled by variable i) use CPaintDC.TextOut();
Please help me !
Thanks !

Lgx

-- modified at 19:05 Friday 7th April, 2006

Re: How to display series of numbers ?

Ravi Bhavnani7-Apr-06 15:36

Ravi Bhavnani

7-Apr-06 15:36

To display the series on the same line, simply construct the string and use TextOut() to display it, as in:

CString strNumbers;
for (int nNum=1; (nNum <= 50); nNum++) {
  CString strNum;
  strNum.Format ("%d ", nNum);
  strNumbers += strNum;
}
VERIFY (pDC->TextOut (10, 10, strNumbers));

/ravi

My new year's resolution: 2048 x 1536
Home | Music | Articles | Freeware | Trips
ravib(at)ravib(dot)com

Re: How to display series of numbers ?

Surivevoli8-Apr-06 0:29

Surivevoli

8-Apr-06 0:29

i don't understand final code :
VERIFY (pDC->TextOut (10, 10, strNumbers);
what's it mean ?

Lgx

Re: How to display series of numbers ?

ThatsAlok8-Apr-06 1:25

ThatsAlok

8-Apr-06 1:25

Surivevoli wrote:
VERIFY (pDC->TextOut (10, 10, strNumbers);

VERIFY means to verify that your statement is properly fired or not.. try you local copy of msdn for these keywords

Re: How to display series of numbers ?

Ravi Bhavnani8-Apr-06 4:03

Ravi Bhavnani

8-Apr-06 4:03

See this[^] link for information on the VERIFY and ASSERT macros.

/ravi

My new year's resolution: 2048 x 1536
Home | Music | Articles | Freeware | Trips
ravib(at)ravib(dot)com

Re: How to display series of numbers ?

Hamid_RT7-Apr-06 18:42

Hamid_RT

7-Apr-06 18:42

Hi Surivevoli,

CString Str;
int i=0;
while(i<50)
{
Str.Format("%d",i);
dc.SetBkMode(0);
dc.TextOut(X,50,Str,Str.GetLength());
X+=20;
i++;
}

Re: How to display series of numbers ?

Surivevoli8-Apr-06 0:04

Surivevoli

8-Apr-06 0:04

Thank you !
dc.SetBkMode(0)is uderstanded as dc.SetBkMode(TRANSPARENT)???
if before i draw a rectangle filled Red color
{i use CBrush ...},
i try release that command{dc.SetBkMode} and use TextOut() to draw number text on the rectangle, but i see nothing changed

if i want display formated "01","02","03",...
Can you help me ?

Lgx

-- modified at 6:34 Saturday 8th April, 2006

Re: How to display series of numbers ?

Hamid_RT8-Apr-06 1:13

Hamid_RT

8-Apr-06 1:13

Surivevoli,
CString Str;
int i=0;
while(i<50)
{
Str.Format("0%d",i);
dc.SetBkMode(0);
dc.TextOut(X,50,Str,Str.GetLength());
X+=32;
i++;
}

-- modified at 7:13 Saturday 8th April, 2006

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