C++ destructor issue with std::vector of class objects

Question

I am confused about how to use destructors when I have a std::vector of my class.

So if I create a simple class as follows:

class Test
{
private:
 i         


        

Answer 1

Without a copy-constructor, the vector will create a flat copy of your object. This leads to two objects of type Test referencing the same array big. The first instance deletes the array when it gets destroyed, and then the second instance try to dereference a deleted pointer, which is undefined behavior.