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

namespace ASS_1_practise
{
    class Program
    {
        static void Main(string[] args)
        {  char [,] studentArray = new char {    {'A','B','A','C','C','D','E','E','A','D'},
                                                                          {'D','B','A','B','C','A','E','E','A','D'},
                                                                          {'E','D','D','A','C','B','E','E','A','D'},
                                                                          {'C','B','A','E','D','C','E','E','A','D'},
                                                                          {'A','B','D','C','C','D','E','E','A','D'},
                                                                          {'B','B','E','C','C','D','E','E','A','D'},
                                                                          {'B','B','A','C','C','D','E','E','A','D'},
                                                                          {'E','B','E','C','C','D','E','E','A','D'}};
        string [ ] namesArray = new string { "Jack ", "John ", "Jill ", "Mary ", "Peter", "Bob  ", "Nancy", "Pat  " };
        char [ ] keyArray = new char {'D','B','D','C','C','D','A','E','A','D'};
        int [ ] scoreArray = new int { 2, 2, 5, 3, 3, 4, 4, 4, 6, 7 };
        int [ ] totalScoreArray = new int[8];
        for(int i = 0; i < 8; i++){
            for (int j = 0; j < 10; j++) { if (studentArray[i, j] = keyArray[j]) totalScoreArray[i] += scoreArray[j]; }
        }
        int totalFullScore=0;
        for (int k = 0; k < 10; k++) totalFullScore += scoreArray[k];
        char grade; double [ ] percentArray = new double[8];
        for (int w = 0; w < 8; w++) percentArray[w] = totalScoreArray[w] / totalFullScore;
        char [ ] gradeArray = new char [8];
        for (int v = 0; v < 8; v++)
        {   if (percentArray[v] >= 0.9) gradeArray[v] = 'A';
            else if (percentAray[v] >= 0.8) gradeArray[v] = 'B';
            else if (percentAray[v] >= 0.7) gradeArray[v] = 'C';
            else if (percentAray[v] >= 0.6) gradeArray[v] = 'D';
            else if (percentAray[v] < 0.6) gradeArray[v] = 'F';
        }
        int sumtotalFullScore = 0;
            for(int z=0;z<8;z++)sumtotalFullScore+=totalScoreArray[z];
        double average = sumtotalFullScore/8;
        int squareSum=0;
            for(int i=0;i<8;i++)squareSum+=totalScoreArray[i]*totalScoreArray[i];
        double variance=squareSum/8-average*average;
        double StdVariance = Math.Round(variance, 2);
        Console.WriteLine("Student       " + "Score       " + "Grade         ");
        for (int i = 0; i < 8; i++)
        {
            Console.WriteLine(namesArray[i] + "      " + totalScoreArray[i] + "       " + gradeArray[i]);}

            Console.WriteLine("Average:                    " + average);
            Console.WriteLine("Std.Dev:                     " + StdVariance);

            int countA = 0; int countB = 0; int countC = 0; int countD = 0; int countF = 0;
            for (int i = 0; i < 8; i++)
            {
                if (grade[i] == 'A') countA++;
                else if (grade[i] == 'B') countB++;
                else if (grade[i] == 'C') countC++;
                else if (grade[i] == 'D') countD++;
                else countF++;
            }
            Console.Write('A' + "|"); for (int i = 0; i < countA; i++) Console.Write("*");
            Console.WriteLine();
            Console.Write('B' + "|"); for (int i = 0; i < countB; i++) Console.Write("*");
            Console.WriteLine();
            Console.Write('C' + "|"); for (int i = 0; i < countC; i++) Console.Write("*");
            Console.WriteLine();
            Console.Write('D' + "|"); for (int i = 0; i < countD; i++) Console.Write("*");
            Console.WriteLine();
            Console.Write('F' + "|"); for (int i = 0; i < countF; i++) Console.Write("*");

            Console.WriteLine("Student       " + "Score        " + "Grade");
            for (int i = 0; i < 8; i++) { if (gradeArray[i] == 'A')Console.WriteLine(namesArray[i] + "        " + totalScoreArray[i] + "         " + "A"); }
            for (int i = 0; i < 8; i++) { if (gradeArray[i] == 'B')Console.WriteLine(namesArray[i] + "        " + totalScoreArray[i] + "         " + "B"); }
            for (int i = 0; i < 8; i++) { if (gradeArray[i] == 'C')Console.WriteLine(namesArray[i] + "        " + totalScoreArray[i] + "         " + "C"); }
            for (int i = 0; i < 8; i++) { if (gradeArray[i] == 'D')Console.WriteLine(namesArray[i] + "        " + totalScoreArray[i] + "         " + "D"); }
            for (int i = 0; i < 8; i++) { if (gradeArray[i] == 'F')Console.WriteLine(namesArray[i] + "        " + totalScoreArray[i] + "         " + "F"); }




















        }
    }
}