Question

What are the advantages of declaring constructors and destructors under public accessibility?

Answer 1

When constructor and destructor are declared under public:

1. we can initialize the object while declaring it.
2. we can explicitly call the constructor.
3. we can overload constructors and therefore use multiple constructors to initialize objects automatically.
4. we can destroy the objects at the end of the class scope automatically (free unused memory).

However, some C++ compiler and Dev C++ do not allow to declare constructor and destructor under the private section. So it is better to declare constructor and destructor under the public section only.