What is the difference between Object b(); and Object b;?

Question

To be more explicit, I get a compile time error when I try accessing an instance variable when I create an object using (), but when I don\'t, the code compiles and runs as expe

Answer 1

What is the difference between Object b(); and Object b;?

The difference exists because C++ interprets that as a function being declared, instead of an object being created.

Object b;

This is the object b of class Object being created by means of the default constructor.

Object b();

This is the function b(), being declared (it will be defined elsewhere) to return an object of class Object, and no parameters.

Hope this helps.