C++ Program Needed URGENTLY

I need a program very urgent! I need it before sunday. The program has to be written in c++ and it's a console program. It should include a menu (using switch cases) in the beginning where you are able to choose between three different things, "Student", "Teacher" and "Exit". If someone chooses teacher they should be able to give grades to the student. It should say something like "New grade input" or [login to view URL] grading system should be A, B, C, D, E, F. A is highest and E is lowest, F is failed. Once the input is done from the "teacher" then it will return to the menu and if the person chooses student this time he/she should be able to see the grade the teacher put in then return to menu. If teacher is chosen again they should be able to enter a new grade replacing the previous one and it just continues until someone exits. Create this using switch cases in the menu and if you are able to create a class in the program and use it. Like I said I need this very very urgently, shouldn't be hard for someone with experience. Thanks!