What is generalization in c++ 2011

[Vuhelper]

In OO models, some class may have common characteristics. Extract these common features into a new class and inherit original class from this new class. The concept of generalization in OOP means that an object encapsulates common state and behavior for a category of objects.
Example:
In class Student, Teacher, Doctor has the common states like Name, age, gender and common attributes like eat, walk etc. So extracting all the common characteristics in a new class e.g. Shape. And inherit Student, Teacher, and Doctor Classes from the Shape class. This is called generalization.