Write a pthread program to calculate the approximation of a. The method of calculating of the approximation was introduced in the class in the MPI part. You need to implement this method using pthreads. The number of threads and the number of terms required to calculate the approximation should be specified in the command line.

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for some reason I keep getting an error  Exception in thread "main" java.lang.Error: Unresolved compilation problem: The method append(char) is undefined for the type StringBuilder   at StringBuilder.main(StringBuilder.java:19)

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace LibraryManagment { class Program {// private static int userInput;// need varaible to capture user input = int public static string Title { get; private set; } public static bool IsChecked { get; private set; } //Implement a menu system that allows users to add books, check out books, //and check in books using the console. Use Console.ReadLine() ///to capture user input and Console.WriteLine() for output. static void Main(string[] args) {// provides a cosole interaction for a user while (IsChecked) { Console.WriteLine("\nMenu\n" + "1)Add book\n" + "2)Check Out Book\n" + "3)Check In Book\n" + "4)Exit\n"); Console.Write("Choose your…

In Java: -Using a BST Interface (Binary Search Tree)  -Create a class Disk. Disk contains four fields: model (String), size (int), measure (String, for GB or TB), and performance index (int). -Disk needs a constructor to initialize all fields, a toString method, and an equals. Make the class Comparable and write a compareTo method that compares Disks based on the size of the disk. Make sure your comparison accounts for the fact that some numbers are in GB and some are in TB. Write a method that will return true if the disk is the same size as the parms; parms are the size and measure("GB" or "TB"). Also write a method to create a Comparator which compares Disks based on the performance rating. -The client code should do the following: Write a function called build, which will open the disks.txt file, read in each disk and add it to the BST. For each disk the model is on the first line, and the second line contains the size, measure, and performance index. The BST is passed to build as…

Steps to be followed: Create a class called MyThread that extends the Thread class. Declare an instance variable int limitToStop in the MyThread class. Create a parameterized constructor in the MyThread class that takes an int as a parameter to initialize a limitToStop instance variable. Override the run() method in the MyThread class. In the run() method, put a for-loop that goes from 0 to limitToStop. The block associated with the for-loop should print out only the odd numbers. Call Thread.sleep(1000) after every number you print out in the for-loop you created in the previous step. The Thread.sleep(1000) method throws an InterruptedException , which is a checked exception. Therefore, we need to enclose the Thread.sleep(1000) call in a try block. Also, add a catch block associated with the try that catches the InterruptedException and prints out the exception information using the printStackTrace() method. Create a MyThread variable using the new keyword in the main()…

Java. Please use the template in the picture, thank you!