pointers in C

[hyper88]

how do i point to a 2 dimensional array in C?

int array[3][3] = { {1,2,3} ,
{3,2,1},
{1,2,3}};

int *ptArray;

ptArray = array;

if pointing to a 1 dimensional array i would use *(ptArray+2) to point to the 3rd element of a 1D array.

how can i point to a 2D array lets say array[3][1] from the above example?

Thanks

i am just starting to learn C

[spoilme]

You can't actually use a pointer to point to a 2-D array. You have to use a pointer to a pointer ( **) That means that you use one pointer(*) to point to the row of the 2-D array and use another pointer(**) to point to the column of the 2-D array.

[hyper88]

can you show me an example of 2 pointers pointing to a 2D array?
is this the so called "double pointers"?

[CornedBee]

It's better to use a single pointer to point to an array and use this simple formula to calculate the 1d offset:
(an array with n dimensions labeled a, b, c...)
offset = a + size(a)*b + size(b)*c + ...
where size(x) means: the offsets this dimension occupies, in case of an array
ar[5][6][7];
it is
size(a) = 5
size(b) = 30 (5*6)
size(c) = 210 (5*6*7)

Pointers to pointers soon get confusing!