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

Progress bar tracking file downloads
Hey guys, was wondering if there was a way to track how far a file has been downloaded. I know there

Time script, set to my time zone?
I am using this line to get the date and time

Code: $time = date(F." ".d.", &q

[Need Help] php timing issues
I don't know what is going wrong. I need some help with being able to set an image at 9:00am Colorad

Word Trimming
Hi Guys & Gals!!

Hope you are all ok....

I need some help with the following

noob question
i traying to do a php form with auto replay for both(me and the user who send me a mail),

a u

for loop without same $i digits?
Hi,

Can some guru please advise how can I accomplish this with a simple for loop ?

I

Problem with creating FI documents
Hi, Experts!

when i create Fi doc. with standart transaction, i ve been had such problem

Help with looping
I have a comma separated list of colors taken from a database ($ICo) and a directory of images named

PHP mail() with images
I'm trying to get images to send along with my HTML e-mail sent through PHP mail(). I only tried vie

Inter Company -- Resources Related Billing (Services Industry)
Hello,

My company has a scenario where:
Company A bills Company C for INTER (cross