I'm always confused by the member type in class of c++. There are three types: private, protected and public. In inheritance, there are also there specifiers, private, protected and public. After doing some research on Internet, found two good tutorials for this.
http://www.parashift.com/c++-faq-lite/access-rules.html
http://www.learncpp.com/cpp-tutorial/115-inheritance-and-access-specifiers/
Have fun!
