Segmentation Fault, large arrays
You are overflowing the stack. 2 * 1024 * 1024 * sizeof(int) is a lot for most systems.
The simplest solution would be to make the arrays static.
static int a[N][N];static int b[N][N];Other methods:
- Make the arrays global (this is essentially the same as the above)
Use
mallocin a loop and of course remember tofreeint **a = malloc(N * sizeof *a);for (i = 0; i < N; i++) a[i] = malloc(N * sizeof *a[i]);