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.
Did you know?Explore Trending and Topic pages for more stories like this.

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 Like 44 Dislike
Previous forums Next forums
Other forums

Logic question
im wondering what's the best method to do the above list:

it is for alliance @ MMORPG game

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

Error In Syntax
I got this error:

Code: Parse error: syntax error, unexpected '>' in /home/bucket/publ

PHP hyperlinks generator
Hi

I need some help to get this done using php:


1 - I have few hyperlinks say 500

CE 7.1 and External GIS integration
Hi All,

We want to develop an application on CE 7.1 which uses GIS features from an exter

Setting condidtions for an input box
Hi all,

I would like to set a condition in a txt box that says the number a user enters has t

Taking an HTML form and a PHP program and making it into one working file.
Hello,

So I would like to display everything INSIDE a specific directory. In other words, I

Help on query replacing the date
Hi Pals,

i want to replace the current date in a column to some value say C or D or any n

MS are the best!!!
Visit http://www.microsoft.com/australia/windows/default.aspx?h=watch-a-demo and click the massive '

Simple PHP/Java Help..
Hi,
I'm trying to build a little program to do with calculating postage. Unfortunately i haven't

Sign up to write
Sign up now if you have flare of writing..
Login   |   Register
Follow Us
Indyaspeak @ Facebook Indyaspeak @ Twitter Indyaspeak @ Pinterest RSS



Play Free Quiz and Win Cash