checking memory/pointer if it's valid before deleting

I'm trying to find out a proper practice of checking if the pointer/array is valid before calling the delete operator. I know I can check if the pointer is a NULL pointer before deciding whether I should call the delete operator, but that doesn't take care of the case of a dangling pointer. In other words, how do I check whether I have proper access to the memory that the pointer is pointing to before calling the delete operator?

Thanks in advance for suggestions.

You can't check if the pointer is dangling. The best practice is to do:

Code:

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delete my_pointer;
my_pointer = NULL;

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It is OK to delete a NULL pointer, so you don't need to check if it's NULL before calling delete.

What happens if I would allocate my_pointer again right after delete? Would it get assigned to an address that has enough memory in the heap?

Yes.