Confusion with copy constructor and private member

Question

Suppose I have the following class:

class Test
{
             int num;
     public:
             Test(int x):num(x){}
             Test(const Test &rhs):num(         


        

Answer 1

Access limitations are per-class, not per-object.

"private" means -- can only be accessed from within the same class.

"protected" means -- can be accessed from within the same class, and can also be accessed from within derived-classes (in derived classes, protected non-static members can only be accessed through variables with derived class type).

"public" means -- can be accessed by anything.

The point of access limitations is to limit the region of code that has to be inspected in order to understand where the values are used, rather than to stop code from using the values.