Miximum matrix size? / reading big arrays of data

Zlatko · 07-08-2009, 07:07 AM

Elya, in C you can use
#define N_molPOL 356
or try declaring them as const int.
In C++ using a const int in an array decalration would work. I'm not sure about C.

The general convention for defines is that they are all capitals, like this:
#define N_MOLPOL 356
but that's just convention.

tabstop · 07-08-2009, 07:43 AM

Quote:

Originally Posted by Elya

Dear All,

Thanks a lot for your advises. I made matrix static.
insert

Code:

static double POLRx[N_molPOL][N_beadPOL][N_files];
......

but I have got an error message.

insert

Code:

mean_square_forum.c:10: error: variably modified ‘CRx’ at file scope
mean_square_forum.c:11: error: variably modified ‘CRy’ at file scope
.........................

Is this actually allowed by C? I've read that such matrix declaration is permitted only in C++. Is this true?

Thanks
Elya

No. You can't have such matrix declarations at all in C++. (They're probably referring to vectors instead.) If you do have a VLA, it must be inside a function. At a first glance, I don't see why you can't declare this in your main.

07-08-2009, 07:07 AM	#16
Zlatko pwning noobs Join Date: Jun 2009 Location: The Great White North Posts: 125	Elya, in C you can use #define N_molPOL 356 or try declaring them as const int. In C++ using a const int in an array decalration would work. I'm not sure about C. The general convention for defines is that they are all capitals, like this: #define N_MOLPOL 356 but that's just convention. __________________ Sun Certified Java Programmer / Developer IEEE CSDP
Zlatko is offline

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Abnormal Program Termination when executed from C:\Program Files\...	m37h0d	Windows Programming	48	09-26-2008 03:45 AM
Bitmasking Problem	mike_g	C++ Programming	13	11-08-2007 12:24 AM
Weird errors.	Desolation	C++ Programming	20	05-09-2007 01:10 PM
Trouble with DMA Segmentation Faults	firestorm717	C Programming	2	05-07-2006 09:20 PM