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+using RabbitMQ.Client; + +var фабрика = new ConnectionFactory { HostName = "localhost" }; +using var подключение = фабрика.CreateConnection(); +using var канал = подключение.CreateModel(); + +канал.ExchangeDeclare(exchange: "job", type: ExchangeType.Fanout); +Random rand = new Random(); +foreach (var элемент in Enumerable.Range(0, 1000)) +{ + var сообщение = rand.Next().ToString(); + + var тело = Encoding.UTF8.GetBytes(сообщение); + канал.BasicPublish(exchange: "job", + routingKey: string.Empty, + basicProperties: null, + body: тело); + + Console.WriteLine($" [x] Поступила заявка {сообщение}"); + await Task.Delay(500); +} + +Console.WriteLine(" Нажмите [Enter] для выхода."); +Console.ReadLine(); + +static string ПолучитьСообщение(string[] аргументы) +{ + return ((аргументы.Length > 0) ? string.Join(" ", аргументы) : "info: Принято!"); +} \ No newline at end of file diff --git a/tasks/nikiforova-ts/Lab_4/DApp/Consumer#2/Consumer#2.csproj b/tasks/nikiforova-ts/Lab_4/DApp/Consumer#2/Consumer#2.csproj new file mode 100644 index 0000000..79fb680 --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/DApp/Consumer#2/Consumer#2.csproj @@ -0,0 +1,15 @@ + + + + Exe + net8.0 + Consumer_2 + enable + enable + + + + + + + diff --git a/tasks/nikiforova-ts/Lab_4/DApp/Consumer#2/Program.cs b/tasks/nikiforova-ts/Lab_4/DApp/Consumer#2/Program.cs new file mode 100644 index 0000000..e21eba1 --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/DApp/Consumer#2/Program.cs @@ -0,0 +1,31 @@ +using System.Text; +using RabbitMQ.Client; +using RabbitMQ.Client.Events; + +var фабрика = new ConnectionFactory { HostName = "localhost" }; +using var подключение = фабрика.CreateConnection(); +using var канал = подключение.CreateModel(); + +канал.QueueDeclare(queue: "принятые"); +канал.QueueBind(queue: "принятые", + exchange: "job", + routingKey: string.Empty); + +Console.WriteLine(" [*] Ожидание сообщений."); + +var потребительПринятых = new EventingBasicConsumer(канал); +потребительПринятых.Received += async (model, ea) => +{ + byte[] тело = ea.Body.ToArray(); + var сообщение = Encoding.UTF8.GetString(тело); + + string вывод = $"Заявка принята {сообщение} на исполнение"; + Console.WriteLine($" [x] Готово. {вывод}"); + канал.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false); +}; +канал.BasicConsume(queue: "принятые", + autoAck: false, + consumer: потребительПринятых); + +Console.WriteLine(" Нажмите [Enter] для выхода."); +Console.ReadLine(); \ No newline at end of file diff --git a/tasks/nikiforova-ts/Lab_4/DApp/Publisher/Program.cs b/tasks/nikiforova-ts/Lab_4/DApp/Publisher/Program.cs new file mode 100644 index 0000000..f57f784 --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/DApp/Publisher/Program.cs @@ -0,0 +1,38 @@ +using System; +using RabbitMQ.Client; +using RabbitMQ.Client.Events; +using System.Text; + +var фабрика = new ConnectionFactory { HostName = "localhost" }; +using var подключение = фабрика.CreateConnection(); +using var канал = подключение.CreateModel(); + +Random rand = new Random(); +string имяОчередиОтклоненных = $"отклоненные{rand.Next()}"; + +канал.QueueDeclare(queue: имяОчередиОтклоненных); +канал.QueueBind(queue: имяОчередиОтклоненных, + exchange: "job", + routingKey: string.Empty); + +Console.WriteLine(" [*] Ожидание сообщений."); + +var потребитель = new EventingBasicConsumer(канал); +потребитель.Received += async (model, ea) => +{ + byte[] тело = ea.Body.ToArray(); + var сообщение = Encoding.UTF8.GetString(тело); + + int времяОжидания = rand.Next(20, 90); + Thread.Sleep(времяОжидания * 100); + + string вывод = $"Заявка отложена {сообщение} на {времяОжидания} минут"; + Console.WriteLine($" [x] Готово. {вывод}"); + канал.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false); +}; +канал.BasicConsume(queue: имяОчередиОтклоненных, + autoAck: false, + consumer: потребитель); + +Console.WriteLine(" Нажмите [Enter] для выхода."); +Console.ReadLine(); \ No newline at end of file diff --git a/tasks/nikiforova-ts/Lab_4/DApp/Publisher/Publisher.csproj b/tasks/nikiforova-ts/Lab_4/DApp/Publisher/Publisher.csproj new file mode 100644 index 0000000..f72406b --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/DApp/Publisher/Publisher.csproj @@ -0,0 +1,14 @@ + + + + Exe + net8.0 + enable + enable + + + + + + + diff --git a/tasks/nikiforova-ts/Lab_4/README.md b/tasks/nikiforova-ts/Lab_4/README.md new file mode 100644 index 0000000..a9ea9e6 --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/README.md @@ -0,0 +1,152 @@ +# Отчёт по лабораторной работе №4 + +Выполнила: студентка гр. ИСЭбд-41 Никифорова Татьяна Сергеевна. + +## Установка брокера сообщений RabbitMQ +Установлен RabbitMQ. Выполнен вход на http://localhost:15672/ в качестве гостя: + +![](picture/1.png) +![](picture/3.png) + +## Прохождение tutorial + +Tutorial№1 +![](picture/5.png) +![](picture/4.png) + +Tutorial№2 +![](picture/6.png) +![](picture/7.png) +![](picture/8.png) + +Tutorial№3 +![](picture/9.png) +![](picture/10.png) + +## Разработка демонстрационных приложений + +Предметная область - процесс подачи заявок на работу и отбор кандидатов. Заявитель является производителем, а команды HR и система обработки заявок - потребителями. + +1. Publisher: +``` +using System; +using RabbitMQ.Client; +using RabbitMQ.Client.Events; +using System.Text; + +var фабрика = new ConnectionFactory { HostName = "localhost" }; +using var подключение = фабрика.CreateConnection(); +using var канал = подключение.CreateModel(); + +Random rand = new Random(); +string имяОчередиОтклоненных = $"отклоненные{rand.Next()}"; + +канал.QueueDeclare(queue: имяОчередиОтклоненных); +канал.QueueBind(queue: имяОчередиОтклоненных, + exchange: "job", + routingKey: string.Empty); + +Console.WriteLine(" [*] Ожидание сообщений."); + +var потребитель = new EventingBasicConsumer(канал); +потребитель.Received += async (model, ea) => +{ + byte[] тело = ea.Body.ToArray(); + var сообщение = Encoding.UTF8.GetString(тело); + + int времяОжидания = rand.Next(20, 90); + Thread.Sleep(времяОжидания * 100); + + string вывод = $"Заявка отложена {сообщение} на {времяОжидания} минут"; + Console.WriteLine($" [x] Готово. {вывод}"); + канал.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false); +}; +канал.BasicConsume(queue: имяОчередиОтклоненных, + autoAck: false, + consumer: потребитель); + +Console.WriteLine(" Нажмите [Enter] для выхода."); +Console.ReadLine(); +``` +2. Consumer 1: +``` +using System.Text; +using RabbitMQ.Client; + +var фабрика = new ConnectionFactory { HostName = "localhost" }; +using var подключение = фабрика.CreateConnection(); +using var канал = подключение.CreateModel(); + +канал.ExchangeDeclare(exchange: "job", type: ExchangeType.Fanout); +Random rand = new Random(); +foreach (var элемент in Enumerable.Range(0, 1000)) +{ + var сообщение = rand.Next().ToString(); + + var тело = Encoding.UTF8.GetBytes(сообщение); + канал.BasicPublish(exchange: "job", + routingKey: string.Empty, + basicProperties: null, + body: тело); + + Console.WriteLine($" [x] Поступила заявка {сообщение}"); + await Task.Delay(500); +} + +Console.WriteLine(" Нажмите [Enter] для выхода."); +Console.ReadLine(); + +static string ПолучитьСообщение(string[] аргументы) +{ + return ((аргументы.Length > 0) ? string.Join(" ", аргументы) : "info: Принято!"); +} +``` + +3. Consumer 3: +``` +using System.Text; +using RabbitMQ.Client; +using RabbitMQ.Client.Events; + +var фабрика = new ConnectionFactory { HostName = "localhost" }; +using var подключение = фабрика.CreateConnection(); +using var канал = подключение.CreateModel(); + +канал.QueueDeclare(queue: "принятые"); +канал.QueueBind(queue: "принятые", + exchange: "job", + routingKey: string.Empty); + +Console.WriteLine(" [*] Ожидание сообщений."); + +var потребительПринятых = new EventingBasicConsumer(канал); +потребительПринятых.Received += async (model, ea) => +{ + byte[] тело = ea.Body.ToArray(); + var сообщение = Encoding.UTF8.GetString(тело); + + string вывод = $"Заявка принята {сообщение} на исполнение"; + Console.WriteLine($" [x] Готово. {вывод}"); + канал.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false); +}; +канал.BasicConsume(queue: "принятые", + autoAck: false, + consumer: потребительПринятых); + +Console.WriteLine(" Нажмите [Enter] для выхода."); +Console.ReadLine(); +``` + +## Результаты выполнения работ + +Запуск программы : + +![](picture/12.png) +![](picture/13.png) +![](picture/14.png) + +Результаты обработки: +![](picture/11.png) +![](picture/15.png) + +Вывод: Ситуация с выполнением задач в очереди первого потребителя (Consumer#1) не изменилась, однако экземпляры второго потребителя (Consumer#2) теперь требуют в два раза больше времени и ресурсов, а их очереди по-прежнему перегружены. \ No newline at end of file diff --git a/tasks/nikiforova-ts/Lab_4/Tutorial№1/Receive/Receive.cs b/tasks/nikiforova-ts/Lab_4/Tutorial№1/Receive/Receive.cs new file mode 100644 index 0000000..0e33652 --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/Tutorial№1/Receive/Receive.cs @@ -0,0 +1,30 @@ +using System.Text; +using RabbitMQ.Client; +using RabbitMQ.Client.Events; + +var factory = new ConnectionFactory { HostName = "localhost" }; +using var connection = factory.CreateConnection(); +using var channel = connection.CreateModel(); + +channel.QueueDeclare(queue: "hello", + durable: false, + exclusive: false, + autoDelete: false, + arguments: null); + +Console.WriteLine(" [*] Waiting for messages."); + +var consumer = new EventingBasicConsumer(channel); +consumer.Received += (model, ea) => +{ + + var body = ea.Body.ToArray(); + var message = Encoding.UTF8.GetString(body); + Console.WriteLine($" [x] Received {message}"); +}; +channel.BasicConsume(queue: "hello", + autoAck: true, + consumer: consumer); + +Console.WriteLine(" Press [enter] to exit."); +Console.ReadLine(); \ No newline at end of file diff --git a/tasks/nikiforova-ts/Lab_4/Tutorial№1/Receive/Receive.csproj b/tasks/nikiforova-ts/Lab_4/Tutorial№1/Receive/Receive.csproj new file mode 100644 index 0000000..f72406b --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/Tutorial№1/Receive/Receive.csproj @@ -0,0 +1,14 @@ + + + + Exe + net8.0 + enable + enable + + + + + + + diff --git a/tasks/nikiforova-ts/Lab_4/Tutorial№1/Send/Send.cs b/tasks/nikiforova-ts/Lab_4/Tutorial№1/Send/Send.cs new file mode 100644 index 0000000..51a40c7 --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/Tutorial№1/Send/Send.cs @@ -0,0 +1,24 @@ +using System.Text; +using RabbitMQ.Client; + +var factory = new ConnectionFactory { HostName = "localhost" }; +using var connection = factory.CreateConnection(); +using var channel = connection.CreateModel(); + +channel.QueueDeclare(queue: "hello", + durable: false, + exclusive: false, + autoDelete: false, + arguments: null); + +const string message = "Hello World! Tutorial№1!"; +var body = Encoding.UTF8.GetBytes(message); + +channel.BasicPublish(exchange: string.Empty, + routingKey: "hello", + basicProperties: null, + body: body); +Console.WriteLine($" [x] Sent {message}"); + +Console.WriteLine(" Press [enter] to exit."); +Console.ReadLine(); \ No newline at end of file diff --git a/tasks/nikiforova-ts/Lab_4/Tutorial№1/Send/Send.csproj b/tasks/nikiforova-ts/Lab_4/Tutorial№1/Send/Send.csproj new file mode 100644 index 0000000..f72406b --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/Tutorial№1/Send/Send.csproj @@ -0,0 +1,14 @@ + + + + Exe + net8.0 + enable + enable + + + + + + + diff --git a/tasks/nikiforova-ts/Lab_4/Tutorial№2/NewTask/NewTask.cs b/tasks/nikiforova-ts/Lab_4/Tutorial№2/NewTask/NewTask.cs new file mode 100644 index 0000000..fbc1657 --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/Tutorial№2/NewTask/NewTask.cs @@ -0,0 +1,32 @@ +using System.Text; +using RabbitMQ.Client; + +var factory = new ConnectionFactory { HostName = "localhost" }; +using var connection = factory.CreateConnection(); +using var channel = connection.CreateModel(); + +channel.QueueDeclare(queue: "task_queue", + durable: true, + exclusive: false, + autoDelete: false, + arguments: null); + +var message = GetMessage(args); +var body = Encoding.UTF8.GetBytes(message); + +var properties = channel.CreateBasicProperties(); +properties.Persistent = true; + +channel.BasicPublish(exchange: string.Empty, + routingKey: "task_queue", + basicProperties: properties, + body: body); +Console.WriteLine($" [x] Sent {message}"); + +Console.WriteLine(" Press [enter] to exit."); +Console.ReadLine(); + +static string GetMessage(string[] args) +{ + return ((args.Length > 0) ? string.Join(" ", args) : "Tutorial№2"); +} \ No newline at end of file diff --git a/tasks/nikiforova-ts/Lab_4/Tutorial№2/NewTask/NewTask.csproj b/tasks/nikiforova-ts/Lab_4/Tutorial№2/NewTask/NewTask.csproj new file mode 100644 index 0000000..f72406b --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/Tutorial№2/NewTask/NewTask.csproj @@ -0,0 +1,14 @@ + + + + Exe + net8.0 + enable + enable + + + + + + + diff --git a/tasks/nikiforova-ts/Lab_4/Tutorial№2/Worker/Worker.cs b/tasks/nikiforova-ts/Lab_4/Tutorial№2/Worker/Worker.cs new file mode 100644 index 0000000..d8b86be --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/Tutorial№2/Worker/Worker.cs @@ -0,0 +1,39 @@ +using System.Text; +using RabbitMQ.Client; +using RabbitMQ.Client.Events; + +var factory = new ConnectionFactory { HostName = "localhost" }; +using var connection = factory.CreateConnection(); +using var channel = connection.CreateModel(); + +channel.QueueDeclare(queue: "task_queue", + durable: true, + exclusive: false, + autoDelete: false, + arguments: null); + +channel.BasicQos(prefetchSize: 0, prefetchCount: 1, global: false); + +Console.WriteLine(" [*] Waiting for messages."); + +var consumer = new EventingBasicConsumer(channel); +consumer.Received += (model, ea) => +{ + byte[] body = ea.Body.ToArray(); + var message = Encoding.UTF8.GetString(body); + Console.WriteLine($" [x] Received {message}"); + + int dots = message.Split('.').Length - 1; + Thread.Sleep(dots * 1000); + + Console.WriteLine(" [x] Done"); + + // here channel could also be accessed as ((EventingBasicConsumer)sender).Model + channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false); +}; +channel.BasicConsume(queue: "task_queue", + autoAck: false, + consumer: consumer); + +Console.WriteLine(" Press [enter] to exit."); +Console.ReadLine(); \ No newline at end of file diff --git a/tasks/nikiforova-ts/Lab_4/Tutorial№2/Worker/Worker.csproj b/tasks/nikiforova-ts/Lab_4/Tutorial№2/Worker/Worker.csproj new file mode 100644 index 0000000..f72406b --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/Tutorial№2/Worker/Worker.csproj @@ -0,0 +1,14 @@ + + + + Exe + net8.0 + enable + enable + + + + + + + diff --git a/tasks/nikiforova-ts/Lab_4/Tutorial№3/EmitLog/EmitLog.csproj b/tasks/nikiforova-ts/Lab_4/Tutorial№3/EmitLog/EmitLog.csproj new file mode 100644 index 0000000..f72406b --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/Tutorial№3/EmitLog/EmitLog.csproj @@ -0,0 +1,14 @@ + + + + Exe + net8.0 + enable + enable + + + + + + + diff --git a/tasks/nikiforova-ts/Lab_4/Tutorial№3/EmitLog/Program.cs b/tasks/nikiforova-ts/Lab_4/Tutorial№3/EmitLog/Program.cs new file mode 100644 index 0000000..7e3c6a1 --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/Tutorial№3/EmitLog/Program.cs @@ -0,0 +1,24 @@ +using System.Text; +using RabbitMQ.Client; + +var factory = new ConnectionFactory { HostName = "localhost" }; +using var connection = factory.CreateConnection(); +using var channel = connection.CreateModel(); + +channel.ExchangeDeclare(exchange: "logs", type: ExchangeType.Fanout); + +var message = GetMessage(args); +var body = Encoding.UTF8.GetBytes(message); +channel.BasicPublish(exchange: "logs", + routingKey: string.Empty, + basicProperties: null, + body: body); +Console.WriteLine($" [x] Sent {message}"); + +Console.WriteLine(" Press [enter] to exit."); +Console.ReadLine(); + +static string GetMessage(string[] args) +{ + return ((args.Length > 0) ? string.Join(" ", args) : "Tutorial№3"); +} \ No newline at end of file diff --git a/tasks/nikiforova-ts/Lab_4/Tutorial№3/ReceiveLogs/Program.cs b/tasks/nikiforova-ts/Lab_4/Tutorial№3/ReceiveLogs/Program.cs new file mode 100644 index 0000000..32c84d2 --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/Tutorial№3/ReceiveLogs/Program.cs @@ -0,0 +1,31 @@ +using System.Text; +using RabbitMQ.Client; +using RabbitMQ.Client.Events; + +var factory = new ConnectionFactory { HostName = "localhost" }; +using var connection = factory.CreateConnection(); +using var channel = connection.CreateModel(); + +channel.ExchangeDeclare(exchange: "logs", type: ExchangeType.Fanout); + +// declare a server-named queue +var queueName = channel.QueueDeclare().QueueName; +channel.QueueBind(queue: queueName, + exchange: "logs", + routingKey: string.Empty); + +Console.WriteLine(" [*] Waiting for logs."); + +var consumer = new EventingBasicConsumer(channel); +consumer.Received += (model, ea) => +{ + byte[] body = ea.Body.ToArray(); + var message = Encoding.UTF8.GetString(body); + Console.WriteLine($" [x] {message}"); +}; +channel.BasicConsume(queue: queueName, + autoAck: true, + consumer: consumer); + +Console.WriteLine(" Press [enter] to exit."); +Console.ReadLine(); diff --git a/tasks/nikiforova-ts/Lab_4/Tutorial№3/ReceiveLogs/ReceiveLogs.csproj b/tasks/nikiforova-ts/Lab_4/Tutorial№3/ReceiveLogs/ReceiveLogs.csproj new file mode 100644 index 0000000..f72406b --- /dev/null +++ b/tasks/nikiforova-ts/Lab_4/Tutorial№3/ReceiveLogs/ReceiveLogs.csproj @@ -0,0 +1,14 @@ + + + + Exe + net8.0 + enable + enable + + + + + + + diff --git a/tasks/nikiforova-ts/Lab_4/picture/1.png b/tasks/nikiforova-ts/Lab_4/picture/1.png new file mode 100644 index 0000000..29657fc Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/1.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/10.png b/tasks/nikiforova-ts/Lab_4/picture/10.png new file mode 100644 index 0000000..5c1640b Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/10.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/11.png b/tasks/nikiforova-ts/Lab_4/picture/11.png new file mode 100644 index 0000000..ca61626 Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/11.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/12.png b/tasks/nikiforova-ts/Lab_4/picture/12.png new file mode 100644 index 0000000..f6087b9 Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/12.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/13.png b/tasks/nikiforova-ts/Lab_4/picture/13.png new file mode 100644 index 0000000..a3a8408 Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/13.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/14.png b/tasks/nikiforova-ts/Lab_4/picture/14.png new file mode 100644 index 0000000..40446ea Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/14.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/15.png b/tasks/nikiforova-ts/Lab_4/picture/15.png new file mode 100644 index 0000000..18f9560 Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/15.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/2.png b/tasks/nikiforova-ts/Lab_4/picture/2.png new file mode 100644 index 0000000..ee73769 Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/2.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/3.png b/tasks/nikiforova-ts/Lab_4/picture/3.png new file mode 100644 index 0000000..2d17df5 Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/3.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/4.png b/tasks/nikiforova-ts/Lab_4/picture/4.png new file mode 100644 index 0000000..ac79b88 Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/4.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/5.png b/tasks/nikiforova-ts/Lab_4/picture/5.png new file mode 100644 index 0000000..e14221e Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/5.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/6.png b/tasks/nikiforova-ts/Lab_4/picture/6.png new file mode 100644 index 0000000..21080b3 Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/6.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/7.png b/tasks/nikiforova-ts/Lab_4/picture/7.png new file mode 100644 index 0000000..8e4d44b Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/7.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/8.png b/tasks/nikiforova-ts/Lab_4/picture/8.png new file mode 100644 index 0000000..edee4e1 Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/8.png differ diff --git a/tasks/nikiforova-ts/Lab_4/picture/9.png b/tasks/nikiforova-ts/Lab_4/picture/9.png new file mode 100644 index 0000000..1f81ebf Binary files /dev/null and b/tasks/nikiforova-ts/Lab_4/picture/9.png differ