LinkedList help

Posted on 16th Feb 2014 07:03 pm by admin

Ok so I just learned quickly about lists, so I have a not too hard project I think, but am having a few issues:

Here is the project. Create a lovely polynomial calculator, that takes the equation from the user, and a number for x.
Then solve it, but I have to use lists. As well as that I have to printout the equation with x at the end. And I will also have to have to add a method for finding the derivative of the equation.

I'll worry about the printout and the derivative at the end, except I have a problem right now... I'll show my code first



Here is the lovely main
Code: import java.util.*;public class PolyDriver { public static void main(String[] args) { boolean isrunning = true; String userinput="no"; String no="no"; String yes="yes"; double whatisx=0; Scanner scan = new Scanner(System.in); System.out.println("What is X?"); whatisx =scan.nextDouble(); while(userinput.equals(no)) { System.out.println("Enter the first integer"); double d = scan.nextDouble(); System.out.println("Enter the exponent"); int e = scan.nextInt(); Poly m = new Poly(d, e, whatisx); System.out.println("Done?"); String j = scan.next(); if(j.equals(yes)) { System.exit(0); } } // System.out.println("Enter the number for x"); // Scanner scan = new Scanner(System.in); }}



Then here is the Poly class


Code: import java.util.*;/* * To change this template, choose Tools | Templates * and open the template in the editor. *//** * * @author JigglyWiggly-laptop */public class Poly { double integer=0; int exponent=0; double variable=0; double vrz=0; double whatisx=0; LinkedList linkedlist = new LinkedList(); public Poly(double d, int e, double x) { integer=d; exponent=e; whatisx=x; calculations(); // calculations(); } public double calculations() { double v = Math.pow(whatisx, exponent); double j = v*integer; linkedlist.add(j); printout(); return j; } public double printout() { for(int i=0; iWhen I run it:
Code: run:What is X?2Enter the first integer2Enter the exponent2---18.0Done?noEnter the first integer2Enter the exponent2---18.0Done?noEnter the first integer2Enter the exponent2---18.0Done? Why does it not make the list bigger? And the numbers should be adding up. Any ideas?

(Also ignore the funky way of getting the user input, this is the way we were told to do so)

No comments posted yet

Your Answer:

Login to answer

318 44

Tweet

Other forums

Where is my php.ini???
Hi

First off - apologies - i'm not a coder so this may sound very amateur.

I'm having

if description does not contain the following words
Hello everyone,

I am parsing a MS Excel (.xls) file and adding it's content to a mySQL databa

Email Form Syantax Issue 2
How to make this look FROM:"OUR TEAM" instead of FROM:abc@mail.com

$headers = "

Confused with Loop
guys, i got confused with Looping...this is the case

I have 3 stocks, let say "Stock A&q

Lack of simpleXML Documentation
What is up with this.

Look at: http://www.php.net/manual/en/function.simplexml-load-file.php<

Posting to another Site?
I have software that people install.
When they install it, is there a way to make it post their d

Pls help with PHP
Pls can anyone direct me on how to create a user account for a customer. For example i want know if

What are the two different files you download to update kernel?
What are the two different files you download to update kernel?

Members Only
Hi all, for my website i have a members area only which on members can veiw, but at the moment anyon

BB_Code error
I'm having a problem with a custom built function and keep getting this error:


Warning: M