Thread: Matrix on stack to int**... How?

Originally Posted by matsp

Well, technicaly, you can pass a stack array around using this method:

Code:

func(int arr2d[][20], ...) ...

The problem with any multidimensional arrays is that you do need to know the size of all dimensions besides the left-most one, because all C arrays are essentially 1D arrays, with a suitable calculation to achieve the location of the dimensions. The same applies when you allocate on the heap or if you create a global variable -it is only chunk of linear memory in every case.

--
Mats

Yeah, that's what I meant by Pass the 2d array as a parameter. You can also do this to force the first parameter to be the same:

Code:

void func(int (&arr2d)[10][20]);

This also has the effect of making sizeof(array) be the actual size of the array.