Cars ZH

namespace Cars
{
    internal class Program
    {
        static void Main(string[] args)
        {
            #region 1.
            string[] csv = File.ReadAllLines("orca_share_media1698960021779_7125954815189299273.csv");

            List<string> model = new List<string>();
            List<double> engine_size = new List<double>();
            List<double> horsepower = new List<double>();
            List<string> latest_launch = new List<string>();

            for (int i = 1; i < csv.Length; i++)
            {
                string[] line = csv[i].Split(';');

                model.Add(line[0]);
                engine_size.Add(Convert.ToDouble(line[1].Replace('.', ',')));
                horsepower.Add(Convert.ToDouble(line[2]));
                latest_launch.Add(line[3]);
            }
            #endregion 1.
            #region 2.
            Console.Write("Adj meg egy évszámot: ");
            string evszam = Console.ReadLine();
            string[] ev = new string[latest_launch.Count];
            for (int i = 0; i < latest_launch.Count; i++)
            {
                string[] line = latest_launch[i].Split("/");
                ev[i] = line[2];
            }

            int db = 0;
            for (int i = 0; i < latest_launch.Count; i++)
            {
                if (ev[i] == evszam)
                {
                    db++;
                }
            }
            Console.WriteLine(db);
            #endregion 2.
            #region 3.
            Console.Write("Adj meg egy lökettérfogatot: ");
            string loketterfogat = Console.ReadLine();
            double avg = 0;
            double avgdb = 0;

            for (int i = 0; i < engine_size.Count; i++)
            {
                if (engine_size[i] == Convert.ToDouble(loketterfogat))
                {
                    avg += horsepower[i];
                    avgdb++;
                }
            }
            Console.WriteLine($"Az átlag teljesítmény: {avg/avgdb}");
            #endregion 3.
            #region 4.
            List<double> temp = new List<double>();
            int minindex = 0;
            double min = horsepower[0] / engine_size[0];
            for (int i = 0; i < engine_size.Count; i++)
            {
                temp.Add(horsepower[i]/engine_size[i]);
                if (min > temp[i])
                {
                    min = temp[i];
                    minindex = i;
                }
                ;
            }
                Console.WriteLine($"Legkisebb teljesítmény/lökettérfogat arányú model: {model[minindex]}");
            #endregion 3.
        }
    }
}