Question

I was asked an interview question: How can we allocate two objects of a class in different functions using the new operator such that they use the same memory space?

Can anyone explain how this can be achieved? Thanks.

EDIT: So the main question was how to create a class Memory_Alloc which should be used by all other classes to allocate memory for their objects. I thought about using Handles. Then he asked me the above question.

Answer 1

The question is a little vague, but off the top of my head you could use:

• placement new — use the new operator to initialize the same memory address
• overloaded new operator — overload the new operator to return the same address
• delegation — using pointer to implementation idiom, make two objects point to the same implementation object