C / C++ / MFC Discussion Boards

CPallini31-Jul-08 0:03

31-Jul-08 0:03

It looks like you simply didn't include the 'test' header file. Forward declarations aren't enough when you need an instance of the object.
Smile | :)

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]

Re: Problem with friend keyword

T.RATHA KRISHNAN31-Jul-08 0:11

T.RATHA KRISHNAN

31-Jul-08 0:11

I've included "test.h" also in character.h. Now it shows the following errors:

error C2440: 'initializing' : cannot convert from 'test *' to 'test'
No constructor could take the source type, or constructor overload resolution was ambiguous
.\character.cpp(124) : error C2819: type 'test' does not have an overloaded member 'operator ->'
d:\backupdelta3d\charactercontrol\test.h(40) : see declaration of 'test'
did you intend to use '.' instead?
.\character.cpp(124) : error C2232: '->test::char_flag1' : left operand has 'class' type, use '.'
Build log was saved at "file://d:\BackupDelta3D\AICharacterControl\Release\BuildLog.htm"
CharacterAnimation - 3 error(s), 0 warning(s)

Shall I use extern instead of friend? Which is good?

Re: Problem with friend keyword

CPallini31-Jul-08 0:17

CPallini

31-Jul-08 0:17

T.RATHA KRISHNAN wrote:
error C2440: 'initializing' : cannot convert from 'test *' to 'test'

Well, the compiler is (of course) right, change the wrong lines (I earlier overlooked the mistake)

test friend_test = new test();
friend_test->char_flag1 = false;

test friend_test;
friend_test.char_flag1 = false;

or to

test * pfriend_test = new test();
pfriend_test->char_flag1 = false;
delete pfriend_test;

Re: Problem with friend keyword

T.RATHA KRISHNAN31-Jul-08 0:21

T.RATHA KRISHNAN

31-Jul-08 0:21

OK.Thank u. What is ur opinion on using extern inplace of friend keyword?

Re: Problem with friend keyword

CPallini31-Jul-08 0:36

CPallini

31-Jul-08 0:36

T.RATHA KRISHNAN wrote:
OK.Thank u.

You're welcome.

T.RATHA KRISHNAN wrote:
What is ur opinion on using extern inplace of friend keyword?

They are unrelated.

BTW: I would use an accessor methods (get/set) for exposing the variable.

Smile | :)

Re: Problem with friend keyword

David Crow31-Jul-08 5:36

David Crow

31-Jul-08 5:36

T.RATHA KRISHNAN wrote:
It's advised by my organisation not to post original code.

Nothing wrong with that. Just make sure your code and comments match, regardless of what names you use.

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

USB Size [modified]

mirtu30-Jul-08 23:13

mirtu

30-Jul-08 23:13

Hi all

How to get USb Attached Device Size.

modified on Thursday, July 31, 2008 6:20 AM

Re: USB Size

CPallini30-Jul-08 23:46

CPallini

30-Jul-08 23:46

Use this.

Re: USB Size

Iain Clarke, Warrior Programmer30-Jul-08 23:53

Iain Clarke, Warrior Programmer

30-Jul-08 23:53

I *knew* I should have refreshed the page before answering. Great minds think alike, eh?

Iain.

Re: USB Size

CPallini31-Jul-08 0:00

CPallini

31-Jul-08 0:00

Iain Clarke wrote:
Great minds think alike, eh?

I suppose. Big Grin | :-D

[added]
BTW: maybe some physics exposure lead to such bents.
[/addes]

Re: USB Size

Iain Clarke, Warrior Programmer30-Jul-08 23:52

Iain Clarke, Warrior Programmer

30-Jul-08 23:52

Measuring tape?

Iain.

Re: USB Size

Perspx30-Jul-08 23:54

Perspx

30-Jul-08 23:54

I assume you mean disk space? If so use the IOCTL_DISK_GET_LENGTH_INFO control code with DeviceIoControl().

The documentation can be found here

Hope this helps,
--Perspx

"The Blue Screen of Death, also known as The Blue Screen of Doom, the "Blue Screen of Fun", "Phatul Exception: The WRECKening" and "Windows Vista", is a multi award-winning game first developed in 1995 by Microsoft" - Uncyclopedia

Re: USB Size

mirtu31-Jul-08 0:21

mirtu

31-Jul-08 0:21

Sorry i was wrong i just edit the question..

Re: USB Size

Iain Clarke, Warrior Programmer31-Jul-08 0:42

Iain Clarke, Warrior Programmer

31-Jul-08 0:42

Between my first answer and now, I've had a bit of a look for an answer for you.

First - click on my name to go to an article I wrote about detecting drives being added / removed. It may be helpful for you.

You've already been told about DEVICE_IO_CONTROL possible solution.

The only other function I've found is GetDiskFreeSpaceEx - which doesn't tell you the total size, just the free space.

But if free space is good enough information for you, it will be a lot easier to use.

Good luck,

Iain.

Re: USB Size

mirtu31-Jul-08 0:54

mirtu

31-Jul-08 0:54

it is nice but not use full for me..If it is possibel then can you give me example of USB attached device Size..

Thx's

Re: USB Size

mirtu1-Aug-08 18:10

mirtu

1-Aug-08 18:10

can any body help me

MS SQL Server/C++

Rob Caldecott30-Jul-08 21:24

Rob Caldecott

30-Jul-08 21:24

I have almost zero database experience, so please be gentle. Smile | :)

I want to access/update a MS SQL Server (or the free Express version) database from a C++ application (could be MFC if required), but don't know where to start. Any pointers would be very welcome!

Thanks.

Re: MS SQL Server/C++

Matthew Faithfull31-Jul-08 0:33

Matthew Faithfull

31-Jul-08 0:33

If I remember rightly there is on OLE/DB provider COM object available for MS SQL Server. It should be a matter of writing a COM client to talk to it. I guess OLE/DB is out of date these days but other than going LINQ I don't know what's replaced it.

"The secret of happiness is freedom, and the secret of freedom, courage."
Thucydides (B.C. 460-400)

Re: MS SQL Server/C++

Rob Caldecott31-Jul-08 0:45

Rob Caldecott

31-Jul-08 0:45

Digging some more it seems ADO is the way to go. Alternatively I buy a copy of this[^] which will give us support for lots of different databases and is cross-platform, which would be useful for this particular project...

Re: MS SQL Server/C++

CPallini31-Jul-08 1:00

CPallini

31-Jul-08 1:00

You may also use ODBC [^].
Smile | :)

Re: MS SQL Server/C++

Mike Dimmick31-Jul-08 2:34

Mike Dimmick

31-Jul-08 2:34

ADO wraps OLE DB to present a VB- and scripting-friendly interface. From C++ you may find that the OLE DB Consumer Templates are actually easier to use: you don't have to go through the Automation data types.

There's even a book[^].

Unfortunately not very many people seem to know about this, so you may find help difficult to come by.

DoEvents: Generating unexpected recursion since 1991

Re: MS SQL Server/C++

Mark Salsbery31-Jul-08 8:50

Mark Salsbery

31-Jul-08 8:50

Here's a place you can compare the non-.NET data access technologies
specific to Windows...

Windows Data Access Components SDK[^]

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: MS SQL Server/C++

vikas amin31-Jul-08 11:47

vikas amin

31-Jul-08 11:47

ADO
http://msdn.microsoft.com/en-us/library/aa905875.aspx[^]

http://msdn.microsoft.com/en-us/library/h43ks021(VS.71).aspx[^]

Vikas Amin

My First Article on CP" Virtual Serail Port "[^]

modified on Thursday, July 24, 2008 5:33 PM

Line feed and Carriage return in Editbox

sunny_vc30-Jul-08 21:18

sunny_vc

30-Jul-08 21:18

Hi ,
I have to display some data in an edit box.
The buffer contains 10,13 characters in between.
So I am displaying as it is.
Suppose I have in my buff "red\r\nblue\r\ngreen",
the display must be

red
blue
green. like this.

But my edit box displaying it in a single line like "red\r\nblue\r\ngreen",

How can I do it?
Please help me.

Regards,
Sunil Kumar

Re: Line feed and Carriage return in Editbox

Rajesh R Subramanian30-Jul-08 21:37

Rajesh R Subramanian

30-Jul-08 21:37

If the code is not confidential, can you show it to us, please?

Please leave us our small pleasures, they are small, but they are ours! - Mycroft Holmes ^

.·´¯`·->Rajesh<-·´¯`·.
Microsoft MVP - Visual C++[^]

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.