Question

Write any four rules for the constructor function.

Answer 1

1. The constructor name is always the same as the class name.
2. They do not have return types, not even void and therefore, they cannot return values.
3. They cannot be static or virtual.
4. They should be declared in the public section.
5. They cannot be inherited, though a derived class can call a base class constructor.
6. Like other C++ functions, they can have default arguments.
7. We cannot refer to their address.
8. An object with a constructor cannot be used as a member of union.
9. They make implicit calls to the operators 'new' and 'delete' when memory allocation is required.
10. When a constructor is declared for a class, initialization of class objects becomes mandatory since the constructor is invoked automatically when the objects are created.