Matrix multiplication error: Segmentation fault (core dumped)

Question

I have the following code, and I want to calculate the running time of several matrix multiplications, with different sizes. I started with matrix size of 100, and moved til

Answer 1

This is a classic stack overflow - you have 3 local arrays each of approx 4 MB in size (assuming 32 bit ints) on your stack for a total of around 12 MB. On most modern operating systems the stack is typically 8 MB or less. Either make the variables static, e.g.

static int A[SIZE][SIZE], B[SIZE][SIZE], C[SIZE][SIZE] = {0};

so that they no longer reside on the stack, or allocate them dynamically.