How are 3D arrays stored in C?

Question

I understand that arrays in C are allocated in row-major order. Therefore, for a 2 x 3 array:

0  1
2  3
4  5

Is stored in memory as

Answer 1

Yep, you're right - they are stored consecutively. Consider this example:

#include 

int array3d[2][3][2] = {
  {{0, 1}, {2, 3}, {3, 4}},
  {{5, 6}, {7, 8}, {9, 10}}
};

int main()
{
  int i;
  for(i = 0; i < 12; i++) {
    printf("%d ", *((int*)array3d + i));
  }
  printf("\n");
  return 0;
}

Output:

0 1 2 3 3 4 5 6 7 8 9 10