using System;
using System.Collections.Generic;
using System.Text;

/*********************************
 * this class takes in any number of test 
 * scores and writes them to an array.
 * Class methods return the average and
 * the gradepoint
 * steve conger 11/6/2008
 * *******************************/

namespace LoopsandArrays
{
    class TestAverage
    {
     
        //constructor takes in studentID and the number
        //of test scores the user wants to enter
        public TestAverage(string stid, int numOfScores)
        {
            //the studentid is assigned to the private field
            //the property only has a get, so
            //that makes this a read only value
            studentid = stid;
            //set the number of scores
            NumberofScores = numOfScores;
            
            //initialize the array to the length the user
            //passed in
            Scores = new double[NumberofScores];
        }

        //this declares an array of doubles
        //to store the scores
        double[] scores;

        //a property encaspulating the score array
        public double[] Scores
        {
            get { return scores; }
            set { scores = value; }
        }

        string studentid;

        //read only property
        public string Studentid
        {
            get { return studentid; }
            
        }
        int numberofScores;

        public int NumberofScores
        {
            get { return numberofScores; }
            set {numberofScores = value; }
        }

        //public methods
        public double CalculateAverage()
        {
            double average = 0;
            double sum = 0;
            
            //a foreach loop to loop through
            //all the double elements in the array
            foreach (double s in Scores)
            {
                sum += s; //add them all to sum
            }
            //divide by the length of the array to
            //get the average
            average = sum / Scores.Length;
            return average;
        }

        public double GradePoint()
        {
            double gp = 0;
            //call the average method to make sure 
            //it has run before assessing the grade point
            double avg = CalculateAverage();

            if (avg >= 90)
            {
                gp = 4.0;
            }
            else if (avg >= 80)
            {
                gp = 3.0;
            }
            else if (avg >= 70)
            {
                gp = 2.0;
            }
            else if (avg >= 60)
            {
                gp = 1.0;
            }
            else
            {
                gp = 0;
            }
            return gp;
        }


    }

}