How to check deallocation of memory

Question

How to check if memory to which pointer p points has been succesfully deallocated?

Answer 1

In few words: you can't.

Check out tools like Valgrind to help you debugging memory leaks issues.

Some other things you should consider:

• Use smart pointers so that you don't have do think about memory management,
• Set your pointers to 0 after you free them, so that a further delete has no effect,
• Use standard classes (vector, ...) instead of rolling your own,
• Finally, don't use pointers (actually you almost can)