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

Email logic not working
I would like to send an email using the php email() function then if it does execute i.e sends i wou

help with calculations on a flat text file
hello,
I have this code below that is attached to a flat file like this:
Email:LastName:FirstN

compile php5 with DOM
Hi,

I can't manage to compile php 5.3.0 from source on Windows to include DOM,
in spite of

SAP Logon Failed
I tried to login to SAP through MMC.

When i click start and give password.

it

Referential Integrity problem when inserting into 2 tables at same time
Hello Everyone,

Im relativity new to PHP and MySQL and i have come up against a problem. i h

Where am I going wrong
Been trying to work this out for hours

I have two tables called 'Genres' and 'Films'. Genre

path to include folder
Hi everyone,

When I'm testing locally, I have to add the name of the site folder as part of t

SCO Unix
I know this might not be the place to ask, but, can anyone tell me if SCO Unix comes with PHP built

question about header() security
is is safe to just use the header() function to redirect someone if they are, say, not logged in? or

Coding Critique
I was hoping someone could take a second and look down my code and see if they see any problems with