Question

I’m learning c++ and OOP and I have class called “Pion” and I have a class “Chessboard” and in the class “Chessboard” a need to declare a 2d array of pointers to the class “Pion” and initialize it to NULL pointers.

I know how to declare the 2d array but I don’t how to initialize it to NULL pointers.

declaring the 2d array should be something like this:
Pion *P[8][8];

but I don’t get the set to null pointers part.

Any help/tips are welcome.

[EDIT]

thanks for all the answers/tips but I’m still confused.
so i have a class called Chessboard and I need to create a 2d array of pointers that link to the “Pion” class, this array needs to be a class member and initialize it to NULL pointers.

so I have tried tried out things and I’ve come up with this

in the .h (header file) I’ve declared a private member class

Pion *P[8][8];

and within the concstructor I’ve put this

for (int x = 0; x < 8; ++x) {
    for (int y = 0; y < 8; ++y) {
        m_velden[x][y] = NULL;
    }
}

This seems to be working but i’m not sure if this is the best solution

Answer 1

It depends on whether P is a local variable or a class member.
In the 1st case, you can initialize all elements to NULL at the moment of declaration

Pion *P[8][8] = {};

In the 2nd case, use P() in the initialization list in Chessboard constructor.