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

help with Get_
ok some how this is not working i am not sure what i am doing wrong here but what this does is when

file_put_contents and createimagefromjpeg
All,
I do somethings and then I have the following code:
file_put_contents('./test/'.$filename

Display the user's weight lost in the past week
Hello everyone,

I am working on a weight loss app for my site, and I want to display the user

Change Age automatically
hi guys . im new to php , is it possible to change age value in mysql automatically when year change

php mysql script to find record
Hi,

Currently I have a simple table with 4 columns. A, B, C, D

If I want to find all

writing my own sobel filter convolution - something is wrong
I am trying to keep it very simple, I cant see anything wrong with my logic, could anybody help poin

Ajax Error since Upgrading to 3.5
Ever since upgrading my site to .NET 3.5 (I needed LINQ), I've been getting this annoying error on o

Is it possible to put an entire 500-page book in a database with PHP?
I am working on an intranet and I was wondering if its possible to code php with mysql to enter a fu

Logging and nologging bulk insert
Hi,

oracle version: 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production

Email to a friend script problems
I have this send-to-a-friend script with 2 issues:


1) When you open the form popup on a p