gistfile1.txt

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

namespace FranclinMath
{
    class Program
    {
        static void Main(string[] args)
        {
        }
    }

    public class SalesReport
    {
        private string[] months = new[] { "Jan", "feb" };
        private string[] makus = new[] { "opel", "fiat" };

        int[,] salesData = 
        {
            { 0, 102 }, { 0, 56 }, { 0, 55 }, { 0, 67 }, { 0, 19 }, { 0, 8 },
            { 1, 17 }, { 1, 8 }, { 1, 4 }, { 1, 0 }, { 1, 0 }, { 1, 0 }
        };

        private int numberOfCars = 2;
        private int numberOfMonths = 6;
        private int[] salesSumByMake;
        private int[] salesSumByMonth;
        private int totalSum = 0;

        public int CalculateBestSellingCar()
        {
            CalculateSales();

            var bestSellingCarMake = 0;
            var soldCars = 0;
            for (int currentCar = 0; currentCar < numberOfCars; currentCar++)
            {
                if (salesSumByMake[currentCar] > soldCars)
                {
                    bestSellingCarMake = currentCar;
                    soldCars = salesSumByMake[currentCar];
                }
            }

            return bestSellingCarMake;
        }
        public int CalculateBestSellingMonth()
        {
            CalculateSales();

            var bestSellingMonth = 0;
            var soldCars = 0;
            for (int currentMonth = 0; currentMonth < numberOfMonths; currentMonth++)
            {
                if (salesSumByMonth[currentMonth] > soldCars)
                {
                    bestSellingMonth = currentMonth;
                    soldCars = salesSumByMake[currentMonth];
                }
            }
            Console.WriteLine($"best month is:{months[bestSellingMonth]}");
            return bestSellingMonth;
        }


        private void CalculateSales()
        {
            salesSumByMake = new int[numberOfCars];
            salesSumByMonth = new int[numberOfMonths];

            for (int currentCar = 0; currentCar < numberOfCars; currentCar++)
            {
                for (int month = 0; month < numberOfMonths; month++)
                {
                    salesSumByMake[currentCar] += salesData[currentCar, month];
                    salesSumByMonth[month] += salesData[currentCar, month];
                    totalSum += salesData[currentCar, month];
                }
            }
        }
    }
}