Student management program.
In data.txt, there are information of students that have student's grade, cgpa, ID, password, homworks and their deadlines. There is Login system, so can add new student or delete student. Also if don't remember the password, can replace other password. Homework system shows homwork list that are sorted by their deadlines. Can add or delete homworks. CGPA system shows student's cgpa and can add or delete grades.