Design a virtual base class- class students, including student number, name and age to protect data members and member functions related student class derived class student leaders, including members of their duties and colleges to protect data and associated member function then by student class derived class of outstanding students and then by the student leaders and outstanding student class class class derived outstanding student leaders. Design a way to achieve the use of document processing school students (including student leaders, outstanding student and outstanding student leaders) to manage, with increased data, update data, query data, delete function data as well as restructuring of the file. (Delete data in the record do delete flag, restructuring document refers to physically remove the deleted record mark) additionally required number of statistics that were three groups of students and the total number of all students.

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