Threads.cs

using System;
using System.IO;
using System.Threading;

class Program
{
    static Mutex mutex = new Mutex();
    static bool firstThreadDone = false;
    static bool secondThreadDone = false;
    static bool thirdThreadDone = false;

    static void Main()
    {
        Thread firstThread = new Thread(GenerateRandomNumbers);
        Thread secondThread = new Thread(ExtractPrimes);
        Thread thirdThread = new Thread(ExtractPrimesWithLastDigit7);
        Thread fourthThread = new Thread(GenerateReport);

        firstThread.Start();
        secondThread.Start();
        thirdThread.Start();
        fourthThread.Start();

        firstThread.Join();
        secondThread.Join();
        thirdThread.Join();
        fourthThread.Join();

        Console.WriteLine("Всі потоки завершили своє виконання.");
    }

    static void GenerateRandomNumbers()
    {
        mutex.WaitOne();
        try
        {
            using (StreamWriter writer = new StreamWriter("numbers.txt"))
            {
                Random rand = new Random();
                for (int i = 0; i < 100; i++)
                {
                    writer.WriteLine(rand.Next(1, 1000));
                }
            }
        }
        finally
        {
            firstThreadDone = true;
            mutex.ReleaseMutex();
        }
    }

    static void ExtractPrimes()
    {
        while (!firstThreadDone)
        {
            Thread.Sleep(100);
        }

        mutex.WaitOne();
        try
        {
            using (StreamReader reader = new StreamReader("numbers.txt"))
            using (StreamWriter writer = new StreamWriter("primes.txt"))
            {
                string line;
                while ((line = reader.ReadLine()) != null)
                {
                    int number = int.Parse(line);
                    if (IsPrime(number))
                    {
                        writer.WriteLine(number);
                    }
                }
            }
        }
        finally
        {
            secondThreadDone = true;
            mutex.ReleaseMutex();
        }
    }

    static void ExtractPrimesWithLastDigit7()
    {
        while (!secondThreadDone)
        {
            Thread.Sleep(100);
        }

        mutex.WaitOne();
        try
        {
            using (StreamReader reader = new StreamReader("primes.txt"))
            using (StreamWriter writer = new StreamWriter("primes_ending_with_7.txt"))
            {
                string line;
                while ((line = reader.ReadLine()) != null)
                {
                    int number = int.Parse(line);
                    if (number % 10 == 7)
                    {
                        writer.WriteLine(number);
                    }
                }
            }
        }
        finally
        {
            thirdThreadDone = true;
            mutex.ReleaseMutex();
        }
    }

    static void GenerateReport()
    {
        while (!thirdThreadDone)
        {
            Thread.Sleep(100);
        }

        mutex.WaitOne();
        try
        {
            using (StreamWriter writer = new StreamWriter("report.txt"))
            {
                WriteFileDetails(writer, "numbers.txt");
                WriteFileDetails(writer, "primes.txt");
                WriteFileDetails(writer, "primes_ending_with_7.txt");
            }
        }
        finally
        {
            mutex.ReleaseMutex();
        }
    }

    static void WriteFileDetails(StreamWriter writer, string fileName)
    {
        writer.WriteLine($"Деталі файлу: {fileName}");
        writer.WriteLine($"Кількість чисел: {File.ReadLines(fileName).Count()}");
        writer.WriteLine($"Розмір файлу: {new FileInfo(fileName).Length} байт");
        writer.WriteLine("Вміст файлу:");

        foreach (string line in File.ReadAllLines(fileName))
        {
            writer.WriteLine(line);
        }

        writer.WriteLine();
    }

    static bool IsPrime(int number)
    {
        if (number <= 1)
            return false;

        for (int i = 2; i <= Math.Sqrt(number); i++)
        {
            if (number % i == 0)
                return false;
        }
        return true;
    }
}