I'm developing a program in which there are two classes. The purpose of one of them is to create vectors that change dinamically (class A) and the other is a bunch of methods to operate on these vectors (class B).
The question is: I don't see any need to define a constructor in class B. In fact, I just define an object of class B, in main(), to access to the methods within it.
Is there any problem to not define a constructor, but using an object to just access to those methods?