need help

[kimatib]

hey can somebody explain what this declaration means:

int** mult_matrix(int A[2][2], int B[2][2])

its thr prototype for a function to multiply 2 matrices..but i dont understand what this declaration of pointers means..

[Banfa]

int ** is a point to a point to an integer. This is often the base type used when dynamically allocating a 2 dimensioned array of int.

int A[2][2];

would be a 2 dimensioned array of integers where each dimension has a size of 2. However you can not declare a array in a parameter list and [] in a parameter list is just another way of specifying a pointer so

int** mult_matrix(int A[2][2], int B[2][2])

is equivilent to

int** mult_matrix(int **A, int **B)

So this is a function that takes 2 parameters each of which is a pointer to a pointer to int and returns a value that is a pointer to a pointer to int.