Re: negative values for char - C / C++ / MFC Discussion Boards

micutzu21-Feb-07 2:32

21-Feb-07 2:32

I did . Thanks.
I do not use CString (not using MFC). Your solution works but I am trying to find a way to determine if there is a possible to find our which Greek character is assigned to -50 (if there is such a possibility).

Re: negative values for char

Naveen21-Feb-07 2:43

Naveen

21-Feb-07 2:43

why cant you try printing it out to console..?

wprintf( L"%c", pGreek );

nave

Re: negative values for char

micutzu21-Feb-07 3:00

micutzu

21-Feb-07 3:00

I did.

printf("%c\n", c);
wprintf( L"%c", c );

Both print the same character which is not the correct one ┼ (this is printed instead of Π)

Re: negative values for char

Naveen21-Feb-07 16:14

Naveen

21-Feb-07 16:14

micutzu wrote:
wprintf( L"%c", c );

if 'c' is of type wchar_t then you must specify like this.

wprintf( L"%c", &c );

nave

Re: negative values for char

Nemanja Trifunovic21-Feb-07 4:00

Nemanja Trifunovic

21-Feb-07 4:00

micutzu wrote:
but I am trying to find a way to determine if there is a possible to find our which Greek character is assigned to -50 (if there is such a possibility).

That entirely depends on the text encoding. Which charset is the webpage you are working with? If it is Windows CP 1253 (Greek), you can find out by setting the codepage of your console window to 1253 and then printing it out. For -50 (ie 206 in unsigned form) it should be greek capital XI: Ξ

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Re: negative values for char

toxcct21-Feb-07 2:33

toxcct

21-Feb-07 2:33

Naveen R wrote:
CString cstext = L"03C5";

naveen, be careful, write this :

CStringW cstext = L"03C5";

CString cstext = _T("03C5");

but don't mix the two styles.
apparently, you're using wide characters in all the rest of your code, so i'd say use the former...

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Re: negative values for char

Naveen21-Feb-07 2:45

Naveen

21-Feb-07 2:45

but CString have both constructors

CString(LPCWSTR lpsz)
CString(LPCSTR lpsz)

Any way I did so because he said( in his previous post) his project is UNICODE define...

nave

Re: negative values for char

toxcct21-Feb-07 2:52

toxcct

21-Feb-07 2:52

Naveen R wrote:
but CString have both constructors

this is not acceptable argument, because, if the application is not defining UNICODE macro, even if you initialize your CString with a LPCWSTR, the string will be casted into ANSI string.

BTW, i doubt of this information. actually, CString gets a LPCTSTR, which is transformed into LPCSTR or LPCWSTR depending on unicode definition

Naveen R wrote:
Any way I did so because he said( in his previous post) his project is UNICODE define...

yes, but then prefer using CStringW. imagine the case when someone else has to maintain the application, or develop the dual possibility of having the application running both ansi and unicode... your code must be flexible, not only "aware"

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Re: negative values for char

Naveen21-Feb-07 16:08

Naveen

21-Feb-07 16:08

toxcct wrote:
if the application is not defining UNICODE macro, even if you initialize your CString with a LPCWSTR, the string will be casted into ANSI string.

Even if UNICODE is defined, I am expecting only ANSI characters in that statement.

toxcct wrote:
yes, but then prefer using CStringW

Whats is this CStringW? I didnt find any such class in vc6. I havent worked in later verions of visual studio. Is it a new class added to the MFC in later verions of visual studio?

nave

Re: negative values for char

kakan21-Feb-07 1:41

kakan

21-Feb-07 1:41

char is a signed data type.

You have to use unsigned char in order to get the character values above 127 (decimal) right, such as:

unsigned char v; 
for (i=0; i {
  v = (unsigned char) buf[i]; 
}

There is a compiler option (/J ?) that defaults char to be unsigned.

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Re: negative values for char

Nemanja Trifunovic21-Feb-07 1:58

Nemanja Trifunovic

21-Feb-07 1:58

If you just want char to be unsigned, set the compiler option /J.

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How to make a combo box readonly?

reza matinnejad21-Feb-07 0:10

reza matinnejad

21-Feb-07 0:10

How could i make a Combo box readonly(user can not write in the combo box) in design time? How could i make a Combo box readonly(user can not write in the combo box) in run time?

Re: How to make a combo box readonly?

Garth J Lancaster21-Feb-07 0:17

Garth J Lancaster

21-Feb-07 0:17

you obviously didnt search/look around CP very hard .. try this http://www.codeproject.com/combobox/readonlycombo.asp[^]

Re: How to make a combo box readonly?

reza matinnejad21-Feb-07 0:21

reza matinnejad

21-Feb-07 0:21

Thanks

Re: How to make a combo box readonly?

David Crow21-Feb-07 3:25

David Crow

21-Feb-07 3:25

reza matinnejad wrote:
How could i make a Combo box readonly(user can not write in the combo box) in design time?

By using the WS_DISABLED style.

reza matinnejad wrote:
How could i make a Combo box readonly(user can not write in the combo box) in run time?

By calling EnableWindow(FALSE).

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Re: How to make a combo box readonly?

ThatsAlok21-Feb-07 5:57

ThatsAlok

21-Feb-07 5:57

reza matinnejad wrote:
How could i make a Combo box readonly(user can not write in the combo box) in design time? How could i make a Combo box readonly(user can not write in the combo box) in run time?

use combo list

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Reconnecting a dead Network Connection

GeeBru20-Feb-07 23:45

GeeBru

20-Feb-07 23:45

Hey all,

I'm having a problem with an MFC program using CSockets. What i'm trying to do is have a connection to a server (that won't be my own creation) which can reconnect or attempt to reconnect if the connection is ever lost. The problem I have is if the address doesn't exist the application seems to pause and become unresponsive when trying to connect. Which is fair enough, but how do I prevent the connect if the address doesn't exist or isn't ready to connect because the program will be automated and does other stuff between connections.

Thanks in advance,

Chris

Re: Reconnecting a dead Network Connection

Garth J Lancaster21-Feb-07 0:13

Garth J Lancaster

21-Feb-07 0:13

cant you issue an icmp/ping to see if the address is out there before you attempt to connect to it ? .. it seems that this unresponsive behaviour is common in network apps

'g'

Re: Reconnecting a dead Network Connection

GeeBru21-Feb-07 0:16

GeeBru

21-Feb-07 0:16

yeah thats what I was thinking, could you point me towards the ping commands please? I had a look yesterday but was unable to find a suitable example.

Thanks

Re: Reconnecting a dead Network Connection

Garth J Lancaster21-Feb-07 0:21

Garth J Lancaster

21-Feb-07 0:21

try this from PJ Naughter

http://www.naughter.com/ping.html[^]

'g'

Re: Reconnecting a dead Network Connection

James R. Twine21-Feb-07 1:14

James R. Twine

21-Feb-07 1:14

   I would suggest looking into non-blocking sockets, or a worker thread to block on the connect (and retry) for you.

   Be careful relying on Ping - there are firewalls out there that can be configured to ignore ICMP Ping packets, so relying solely on Ping is not a good idea, IMHO, especially if the server is not yours, implying that you do not have that much control over its connectivity.

   Peace!

-=- James
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About File Extension

siddharthsan20-Feb-07 23:38

siddharthsan

20-Feb-07 23:38

hi,

Can anybody tell me about .aps file like what it is and uses???

Siddharth

Re: About File Extension

GeeBru21-Feb-07 0:07

GeeBru

21-Feb-07 0:07

Hi,
I don't know anything about the format but I found this on a Microsoft page :

"The Resource Editor generates and uses a .APS file. This file contains a binary format of the resources. The Resource Editor loads the resources from this file to reduce the time required to load them."

Hope this helps,
Chris

Re: About File Extension

David Crow21-Feb-07 3:26

David Crow

21-Feb-07 3:26

siddharthsan wrote:
Can anybody tell me about .aps file like what it is and uses???

APpStudio

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Re: About File Extension

ThatsAlok21-Feb-07 5:58

ThatsAlok

21-Feb-07 5:58

siddharthsan wrote:
Can anybody tell me about .aps file like what it is and uses???

http://www.wotsit.org/search.asp?s=windows

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