Lab3-2

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Project_2
{
    class Program
    {
        static void Main(string[] args)
        {
            int[,] array = new int[3,5];
            int r = 0, s = 1, num;
            int[] sum = new int[3];
            float[] average = new float[4];
            Console.WriteLine("Enter Grades");
            for (int i = 0; i < 3; i++){
                for (int j = 0; j < 5; j++)
                {
                    if((i == r ) && (j == 0)){
                        array[i, j] = s;
                        r++;
                        s++;
                    }
                    else {
                        num = int.Parse(Console.ReadLine());
                        array[i, j] = num;
                        sum[i] += num;
                    }
                }
            }

            for (int i = 1; i < 5; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    average[i-1] += array[j, i];
                }
                average[i - 1] /= 4;
            }

            for (int i = 0; i < 3; i++)
            {
                Console.Write("\n");
                for (int j = 0; j < 5; j++)
                {
                    Console.Write("{0}\t", array[i, j]);
                }
                Console.Write("\n\n");
            }

            for(int i = 0; i < 3; i++)
            {
                Console.WriteLine("Sum of student {0} = {1}", i+1, sum[i]);
            }
            for(int i= 0; i < 4; i++)
            {
                Console.WriteLine("Average of course {0} = {1}", i+1, average[i]);
            }

            //Console.WriteLine("Sum = {0}\nAverage = {1}", sum, average);

            Console.ReadLine();
        }
    }
}