Thread: Miximum matrix size? / reading big arrays of data

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.

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.