Of course, that part is clear. The question is, if the two rows are guaranteed to be contiguous in memory. If using heap allocated memory, one could easily cons

Of course, that part is clear. The question is, if the two rows are guaranteed to be contiguous in memory. If using heap allocated memory, one could easily construct a counterexample (i'm not sure how the stack allocated array behaves, i guess it works because it's the sane choice, but not strictly guaranteed): int *x; int numRows = 2; int numCols = 3; x = (int *)malloc(numRows * sizeof(int )); for (int i = 0; i < numRows; i++) { x[i] = (int )malloc(numCols * sizeof(int)); } // This could segfault x[0][4] = 42;