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

bit of help needed
Im about to sort out my registration page for my website by customising a "registration" s

Regarding accessing SQL query issued by any user in Oracle 10g
Hi all,
i want to know the queries issued by various users accessing a database...

Remore client postprocessing phase getting dump SAPSQL_ARRAY_INSERT_DUPREC
Hello Expects,I have started remore client copy. Data was copied successfully. but while running pos

Is there something wrong?
Hi all,

Just a quick question... can someone look at this code and see if something is wrong?

passing an array of objects after submit
How do I do this? This is what I have tried and it is not working.

<form method="

Coding question?
Hey guys, I have a quick question. If I want to make a way for people to pay for health in my game,

RTF fomatting to email content
Im trying to sen an email with content is picked up from a rtf-file (file_get_contents('*.rtf'). Mai

DirectoryIterator and Hacked Website
Hi Everyone.

My problem:
Some one has been sneaking in to my website hidden Iframes. I've

How to restrict the display of report variants
Hello All,

I want t know how to restrict the display of report variants.
I mean, whe

Variable Clash
In the past I've had variables clash. For example:

Code: <?php
$c = 5;
$ca