gistfile1.cs

using System;

namespace SomeAssignment
{
    public class ProfessorRating
    {
        public int Id
        {
            get;
            private set;
        }

        public int Easiness { get; set; }
        public int Helpfulness { get; set; }
        public int Clarity { get; set; }

        public ProfessorRating(int id) : this(id, 0, 0, 0) { }

        public ProfessorRating(int id, int easiness, int helpfulness, int clarity)
        {
            Id = id;
            Easiness = easiness;
            Helpfulness = helpfulness;
            Clarity = clarity;
        }

        public double GetRatingAverage()
        {
            return Math.Round((Easiness + Helpfulness + Clarity) / 3f);
        }
    }

    public class Implementation
    {
        public Implementation()
        {
            var prof = new ProfessorRating(0);

            Console.WriteLine("Enter professor easiness");
            prof.Easiness = int.Parse(Console.ReadLine());
            
            Console.WriteLine("Enter professor helpfulness");
            prof.Helpfulness = int.Parse(Console.ReadLine());
            
            Console.WriteLine("Enter professor clarity");
            prof.Clarity = int.Parse(Console.ReadLine());

            Console.WriteLine();

            Console.WriteLine("Easiness: " + prof.Easiness);
            Console.WriteLine("Helpfulness: " + prof.Helpfulness);
            Console.WriteLine("Clarity: " + prof.Clarity);

            Console.WriteLine("Average rating: " + prof.GetRatingAverage());
        }
    }
}