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

namespace ConsoleApplication2
{
    class Program
    {
        struct Gost
        {
            public string name;
            public double stoimost;
            public int mesta;
            public int zayavka;
            public int dneypredvopl;
            public Gost(string n, int s, int m, int z, int d)
            {
                name = n;
                stoimost = s;
                mesta = m;
                zayavka = z;
                dneypredvopl = d;
            }
        }
        static void Main(string[] args)
        {
            Gost[] gosts = new Gost[3];
            gosts[0] = new Gost("Гост", 2000, 8, 6, 10);
            gosts[1] = new Gost("Муром", 1500, 7, 4, 3);
            gosts[2] = new Gost("Рим", 3000, 15, 6, 23);

            string path = @"J:\8\gost.txt ";

            try
            {
                using (BinaryWriter writer = new BinaryWriter(File.Open(path, FileMode.OpenOrCreate)))
                {
                    foreach (Gost a in gosts)
                    {
                        writer.Write(a.name);
                        writer.Write(a.stoimost);
                        writer.Write(a.mesta);
                        writer.Write(a.zayavka);
                        writer.Write(a.dneypredvopl);
                    }
                }
                using (BinaryReader reader = new BinaryReader(File.Open(path, FileMode.Open)))
                {
                    while (reader.PeekChar() > -1)

                    {
                        string name = reader.ReadString();
                        int stoimost = reader.ReadInt32();
                        int mesta = reader.ReadInt32();
                        int zayavka = reader.ReadInt32();
                        int dneypredvopl = reader.ReadInt32();
                        Console.WriteLine("Гостиница: {0}, Стоимость: {1}, Количество мест: {2}, Количество заявок: {3}, Дни по предварительнойоплате: {4}", name, stoimost, mesta, zayavka, dneypredvopl);
                    }
                }
                string path1 = @"J:\8\gosts.txt ";
                using (BinaryWriter w = new BinaryWriter(File.Open(path1, FileMode.OpenOrCreate)))
                {
                    for (int i = 0; i < 3; i++)
                    {
                        if (gosts[i].dneypredvopl == 10)
                        {
                            gosts[i].stoimost = gosts[i].stoimost - gosts[i].stoimost * 0.05;
                        }
                    }
                    for (int i = 0; i < 3; i++)
                    {
                        if (gosts[i].dneypredvopl > 20)
                        {
                            gosts[i].stoimost = gosts[i].stoimost - gosts[i].stoimost * 0.1;
                        }
                        w.Write(gosts[i].name + " " + gosts[i].stoimost + " " + gosts[i].mesta + " " + gosts[i].zayavka + " " + gosts[i].dneypredvopl + " ");
                    }
                }
            }

            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            Console.ReadLine();
        }
    }
}