Question

I know how to create a multidumentional array statndard way:

const int m = 12;
const int y = 3;
int sales[y][n];

And I know how to create a pointer that points to one dimentional array:

int * ms = new int[m];

But is it possible to create a pointer that points to multidumentional array?

int * sales = new int[y][m];   // doesn't work
int * mSales = new int[m];    // ok
int * ySales = new int[y];    // ok
mSales * ySales = new mSales[y];    // doesn't work, mSales is not a type

How to create such a pointer?

Answer 1

The expression new int[m][n] creates an array[m] of array[n] of int.
Since it’s an array new, the return type is converted to a pointer to
the first element: pointer to array[n] of int. Which is what you have
to use:

int (*sales)[n] = new int[m][n];

Of course, you really shouldn’t use array new at all. The
_best_solution here is to write a simple Matrix class, using
std::vector for the memory. Depending on your feelings on the matter,
you can either overload operator()( int i, int j ) and use (i, j)
for indexing, or you can overload operator[]( int i ) to return a
helper which defines operator[] to do the second indexation. (Hint:
operator[] is defined on int*; if you don’t want to bother with
bounds checking, etc., int* will do the job as the proxy.)

Alternatively, something like:

std::vector<std::vector<int> > sales( m, n );

will do the job, but in the long term, the Matrix class will be worth
it.