void Roster::remove(string studentID) {

    bool toRemove = false;

    for (int i = 0; i < 5; i++) {

        if (classRosterArray[i] != NULL && studentID == classRosterArray[i] -> getStudentID()) {

                classRosterArray[i] = nullptr;
                toRemove = true;
                break;

            }

        }



    if (!toRemove) {

        cout << "Student: " << studentID << " not found." << endl;

    }

}