C++ Destructors with Vectors, Pointers,

Question

As far as I know, I should destroy in destructors everything I created with new and close opened filestreams and other streams. However, I have some doubts abou

Answer 1

If I have something like std::vector what happens when the vector destructor is called?

It depends.

If you have a vector of values std::vector <MyClass>, then the destructor of the vector calls the destructor for every instance of MyClass in the vector.

If you have a vector of pointers std::vector <MyClass*>, then you're responsible for deleting the instances of MyClass.

What happens if I have a pointer to another class inside a class

ClassB instance would remain in memory. Possible ways to have ClassA destructor to make the job for you are to make B an instance member or a smart pointer.