student records system

I need a C++ program to store a single students marks for 7 subjects. Each subject has its mark split into 2 parts (50% Exam & 50% Assignment). The program requires a base class for member functions to: -Enter marks for each subject. -Display a chosen unit marks & any marks still required in that unit to obtain a pass (40%). -Display all units with total marks to date & the average mark over all subjects. And an additional derived class to: -Save data into a file. -Read data from a file into the program. -Remove any particular mark and replace it with a new one. And all this to be kept as simple as possible throughout. Run in a simple dos box, nothing visual. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Complete ownership and distribution copyrights to all work purchased. ## Platform Windows, Dos box.