When would it be more useful to regard each circle in a drawing as an individual object?

A good answer might be:

In a drawing program, or computer aided design program. A drawing program usually allows users to click on an object in the drawing (such as a circle) and drag it to another location. For an application like that, it is useful to have a software object that corresponds to the object in the drawing.

class Circle
{
  // variables



  // constructors


  // methods


}

So our Circle will be a drawing tool. The circles drawn in the picture will merely be the traces left behind each time the tool is used. A start on the class is at the left.

Let us think about the variables that a Circle needs.

QUESTION 3:

At a minimum, what variables are needed?