using System;

public class Program

{

        public static double[] arrayAvg(double[, ] a)

    {

        double[] tempArray = new double[a.GetLength(0)];

        double sum = 0;

        for (int i = 0; i < a.GetLength(0); i++)

        {

            for (int j = 0; j < a.GetLength(1); j++)

            {

                sum = sum + a[i, j];

            }

​

            double avg = sum / (a.GetLength(1));

            tempArray[i] = avg;

            sum = 0;

        }

​

        return tempArray;

    }

    public static void Main()

        {

        Console.WriteLine("How many students are in your class?");

        int students = int.Parse(Console.ReadLine());

        string [] names = new string [students];

        Console.WriteLine("Please type all the students names, and press enter after each one.");

            for (int i = 0; i < names.Length; i++)

                {

                   names [i] = Console.ReadLine();

                }

                Console.Clear();

            Array.Sort(names);

        Console.WriteLine("How many grades will you be entering for each student?");

        int amount = int.Parse(Console.ReadLine());

        double[ ,] grades = new double [students, amount];

        for (int i = 0; i < grades.GetLength(0); i++)

        {

            Console.WriteLine("Please enter the grades for " + names[i]);

            for (int j = 0; j < grades.GetLength(1); j++)

                grades [i,j] = double.Parse(Console.ReadLine());

                Console.Clear();

        }

        double [] myAvg = arrayAvg(grades);

        Console.WriteLine();

        Console.WriteLine("Here are the grades for these students!");

        double [] classAvg = arrayAvg(grades);

        Console.WriteLine();

        for (int i = 0; i < students; i++)

        {

            Console.Write(names[i] + ":  | ");

            for (int j = 0; j < amount; j++)

            Console.Write(grades[i ,j] + "|  ");

            Console.WriteLine(" The Final Average: " + myAvg[i]);

            Console.WriteLine("\n_____________________________________________________");

            Console.WriteLine();

        }

            Console.WriteLine("The students here have made Honor Roll!");

            Console.WriteLine();

        for (int i = 0; i < myAvg.Length; i++)

        {

            if (myAvg[i] > 90)

                Console.WriteLine(names[i]);

        }

            Console.WriteLine();

            Console.WriteLine("The students here have Failed!");

            Console.WriteLine();

        for (int i = 0; i < myAvg.Length; i++)

        {

            if (myAvg[i] < 65)

                Console.WriteLine(names[i]);

        }

        Console.WriteLine();

        Console.WriteLine("These students have Passed!");

        Console.WriteLine();

        for (int i = 0; i < myAvg.Length; i++)

        {

            if (myAvg[i] > 70)

                Console.WriteLine(names[i]);

        }

    }

}