Arrays with very large Indices

I am working on a simulation program that requires a large amount of variables in an array, such as:

int Testp = 64;
int taustp = 4096;
float *sigma = new float[(Testp+1)*(taustp+1)*sizeof(float)];

and then when I assign sigma later, I get a Segmentation Fault. This only happens when my index reaches about 16,000. Do I need to declare my indices somehow as a Long?

No idea about the segmentation fault, beyond that int definitiely suffices for 16000, but you new[] calculates the element size on its own - you're currently allocating sizeof(float) (usually 4) times the space you intended.

Can you post the code that actually segfaults?

Perhaps you're using some crappy old 16-bit DOS compiler which limits the amount of any single allocation to 64K.

>float *sigma = new float[(Testp+1)*(taustp+1)*sizeof(float)];
You don't need sizeof(float) in there. Just:

Code:

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float *sigma = new float[(Testp+1)*(taustp+1)];

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