class ProfessorRating
    {
        private int _professorID;
        private double _helpfullness;
        private double _clarity;
        private double _Easiness;

        public double Helpfullness{get;set;}
        public double Clarity { get; set; }
        public double Easiness { get; set; }
        public int ProfessorID { get; private set; }

        public void helpRating(double hlpRating)
        {
            Helpfullness += hlpRating;
        }

        public void clarRating(double clrRating)
        {
            Clarity += clrRating;
        }

        public void easeRating(double ezRating)
        {
            Easiness += ezRating;
        }

        double rating = 0;
        private void totalRating()
        {
            rating += (easeRating() + clarRating + helpRating);
        }
    }