Programming

If i "new" a object of class type A and A uses some data structure like array, set, map etc.

When i delete this object, need I delete/clear the array/set/map in the destrucator of A, or system will deallocate the memory automatically??

Thanks in advance! Em, do bear me if the question is obvious to you

I think that the delete call will take care of the entire operation of releasing any memory allocated using new.

delete does release all of the memory, except memory that you explicitly allocated with a separate malloc call, which is not very common in C++.

If you are seeing that the program's process seems to keep memory after a delete call, it's because of the os, not your code. The operation to get more memory is expensive, so the os usually holds onto memory until the process exits.

and that delete's counterpart when use malloc is free