C / C++ / MFC

14-Oct-10 0:58

Hi!
I've declared a struct named CameraType globally in a file called GameManager.h. I'm trying to access it like this: CameraType cType; in a file called GamePlayState.cpp. I got the following error:

IntelliSense: identifier "CameraType" is undefined d:\goldminer\source\game\gameplaystate.cpp 109

I've also included the GameManager.h file to the GamePlayState.cpp file. How to overcome this error?

Cedric Moonen14-Oct-10 1:11

Cedric Moonen

14-Oct-10 1:11

Hoe did you declare the structure ? Show some code please.

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

T.RATHA KRISHNAN14-Oct-10 1:12

14-Oct-10 1:12

struct CameraType
{
 core::vector3df FRONTCAM;
 core::vector3df BEHINDCAM;
 core::vector3df TOPCAM;
};

vinoth818715-Oct-10 1:30

vinoth8187

15-Oct-10 1:30

what camera model boss Laugh | :laugh:

.. Try Sony CameraType its 14 megaPixel really its gud Sleepy | :zzz:

no Error will come Poke tongue | ;-P

.. Thanks

..Please Try after using this.. Sniff | :^)

Maximilien14-Oct-10 1:27

Maximilien

14-Oct-10 1:27

did you include gamemanager.h ?

#include "GameManager.h"

Watched code never compiles.

T.RATHA KRISHNAN14-Oct-10 1:33

14-Oct-10 1:33

I've already included. The proble is solved by declaring the structure as const. Is it a good approach?

Sauro Viti14-Oct-10 2:14

Sauro Viti

14-Oct-10 2:14

Declaring something as const mean that you will not need to modify it later. It's very strange that changing your declaration to const fixed the problem, anyway I think that it's a bad approach.
Can you post a code snippet of your declaration?

T.RATHA KRISHNAN14-Oct-10 2:43

14-Oct-10 2:43

Sauro Viti wrote:
Can you post a code snippet of your declaration?

const struct CameraType
{
core::vector3df FRONTCAM;
core::vector3df BEHINDCAM;
core::vector3df TOPCAM;
};

Sauro Viti14-Oct-10 3:23

Sauro Viti

14-Oct-10 3:23

A misunderstanding: I meant the line of code on the .cpp file that gave you the error

Maximilien14-Oct-10 2:35

Maximilien

14-Oct-10 2:35

declaring as const should not generate the compilation error you had.

Watched code never compiles.

David Crow14-Oct-10 3:06

David Crow

14-Oct-10 3:06

T.RATHA KRISHNAN wrote:
How to overcome this error?

See if these help:

http://connect.microsoft.com/VisualStudio/feedback/details/534892/vs-2010-rc-intellisense-c-incorrectly-reports-undefined-identifier[^]

http://connect.microsoft.com/VisualStudio/feedback/details/551093/intellisense-is-unable-to-locate-header-files-in-different-directory[^]

http://stackoverflow.com/questions/1868603/c-error-c2065-cout-undeclared-identifier[^]

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PSVN Roy15-Oct-10 11:23

PSVN Roy

15-Oct-10 11:23

Please check all the spellings you have defined and used once ... This works some times for me.

Thread Pool in VC++.

Le@rner13-Oct-10 20:11

13-Oct-10 20:11

Hi all,

i have no idea about thread pool or multi threading,i need to implement in my application.

please help me for this.

provide me info or any example to implement it.

thanks in advance.

«_Superman_»13-Oct-10 20:14

13-Oct-10 20:14

What exactly are you trying to do?
Threads are created in Windows using the CreateThread[^] API.

«_Superman_»

I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Le@rner13-Oct-10 21:03

13-Oct-10 21:03

Hi ,

i have an list control and there is so much items.

list control have list of site links here i want to chk status of all links.

but all links have diffrent interval time to chk the link status so thats why not able to chk with single thread or function.

please tell me how can i do this for each and every link individually.

each link checked after given interval and return status after checking.

thanks in advance.

«_Superman_»13-Oct-10 21:09

13-Oct-10 21:09

For starters, I would recommend creating one thread each for every list control item.
The link could be passed as a parameter to the thread.

Later I would recommend creating a set of threads and engaging only those threads.

«_Superman_»

I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Le@rner13-Oct-10 21:11

13-Oct-10 21:11

is working even if the number of items in list is too large ?

its safe to use it.

«_Superman_»13-Oct-10 21:15

13-Oct-10 21:15

It will work for large number of items, but it will not be a good design and will have performance problems.
But since you're a beginner in multi-threading, I would recommend you do this first and then optimize it.

«_Superman_»

I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Le@rner13-Oct-10 21:19

13-Oct-10 21:19

ok i'll try this but if its not good for performance,so please tell me the any other optimize and efficient menthod,i also try and start with right way and option.

«_Superman_»13-Oct-10 21:23

13-Oct-10 21:23

You could start by looking at the CreateThreadpool API which is available from Vista onwards.

«_Superman_»

I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Le@rner13-Oct-10 23:25

13-Oct-10 23:25

can u please provide me any example or sample application for this.