TeacherTool

 using System;

using System.IO;

using System.Linq;

using System.Collections.Generic;

namespace TeacherTool

{

  public class Program

  {

 public static void Main()

 {

   int counter = 1;

   Console.WriteLine("Enter Number of students");

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

   Console.WriteLine("-------------------");

   string[] name = new string[numOfStu];

   int[] score = new int[numOfStu];

   int total = 0;

   int average, highest;

   string ave, high;

   for (int i = 0; i < numOfStu; i++)

   {

  Console.WriteLine("Enter Student{0} Name", counter);

  name[i] = Console.ReadLine();

  Console.WriteLine("Enter {0} score", name[i]);

  score[i] = int.Parse(Console.ReadLine());

  total += score[i];

  Console.WriteLine("-------------------");

  counter++;

   }

   average = total / numOfStu;

   Array.Sort(score);

   highest = score[score.Length - 1];

   Console.WriteLine("{0} {1}", average, highest);

   if (average >= 880)

  ave = "A+";

   else if (average >= 770 && average <= 879)

  ave = "A";

   else if (average >= 660 && average <= 769)

  ave = "B";

   else if (average >= 550 && average <= 649)

  ave = "C";

   else if (average >= 440 && average <= 549)

  ave = "D";

   else

  ave = "E";

   if (highest >= 880)

  high = "A+";

   else if (highest >= 770 && highest <= 879)

  high = "A";

   else if (highest >= 660 && highest <= 769)

  high = "B";

   else if (highest >= 550 && highest <= 649)

  high = "C";

   else if (highest >= 440 && highest <= 549)

  high = "D";

   else

  high = "E";

   Console.WriteLine("Average Grade {0} higest grade {1}", ave, high);

 }

  }

}