c++ initialize 2d array of pointers with null?

Question

class A {
   private:
      B* my2DArray[max1][max2];
};

How to initialize my2DArray with NULL here?

Answer 1

Define your own constructor that value initializes the array, setting all of its elements to null pointers. That's done by providing () initializer for the member, which also works for arrays.

class A
{
public:
  A():my2DArray() { }
private:
  B* my2DArray[max1][max2];
};

Answer 2

You could use memset:

memset(&my2DArray, 0, max1*max2*sizeof(B*));