Change image size in checkout?

Question

C++ / C#

where the size of the image changes in the checkout product, the layout is enlarged in poor quality

Answer 1

static should not be removed, the meaning of this B is to calculate how many instances of class A are created (static means that the same object in this variable is visible from all places in the program).
From this point of view, access to a statistical variable through a pointer to an instance of a class is not entirely correct ( a->storage.counter). I would have expected to see A::storage.counter.
delete [] in the destructor to AA, here you correctly noticed. It is this form of delete that must be used, because memory is allocated for an array (new int[10]). In other places, 1 object is allocated, so you need to delete without [].
But, in order for the destructor AA to be called when the pointer to A is deleted (auto a = new A; will deduce the type A *), when this pointer contains an object of class AA, you need to declare the destructor virtual ~ A (and not virtual ~ AA at all) . In this case, declaring AA as a virtual destructor will not be an error in itself.
someValue++ in the AA constructor is quite pointless, because this is a class A field that is simply initialized to zero. As a result, in all instances of AA there will be 1. It is not clear what they were trying to achieve.
You should use operator<< instead of printf in C++, but I don't think the jerk who wrote that test thought much about it.
Didn't notice anything else.