Problem with large pointer array

Hello,
I am working on a program which creates a large pointer array of numbers and then performs several iterations of operations in them.

Code:

---

int * u = new int[N];
double * nu = new double[N];
int * nud = new int[N];
for (int i=0;i<M;i++){

    for (int i=0;i<N;i++){
    u[i]=0;
    nu[i]=0;
    nud[i]=0;
    }

    (perform some operations on nu and nud, increment a counter)


}

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If M is small enough then there are no problems in the program. However once M is large enough I get the "unhanded exception":

std::bad_alloc at memory location 0x0026f728..

Since I am just reusing the same arrays, and since I am able to make it through a few iterations, I didn't think it could be a memory issue. If it is, is there a way I can clear the data completely after each iteration?

Thanks!

You don't think bad_alloc is a memory issue? How big does N have to be to fail?

N is only around 4000. What bothers me is that I get bad_alloc after completing the first few iterations. If it was a memory problem I would expect it to fail during the first initialization. If M is set <7 it runs fine, but any greater and I get the unhandled exeption.

I don't see anything. Can you post complete code for a small program that reproduces the problem.

Quote:

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Originally Posted by goliath11

Since I am just reusing the same arrays, and since I am able to make it through a few iterations, I didn't think it could be a memory issue.

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Well, let's see the complete program. A naked psuedo function with a call to new[] doesn't tell us anything. What if that missing code is corrupting the heap in some way?

For example, why are you using the same "i" in the nested loop as a counter in both loops? That in itself is a bug.

Quote:

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If it is, is there a way I can clear the data completely after each iteration?

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Post a complete program. so that we know how to analyze the problem. So far, what you posted is incomplete, and it has a bug.

Regards,

Paul McKenzie