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

Need help: how to catch acess of undefined class properties
Hello. I am learning OO with PHP and have hit a problem.
Some code runs as perfectly valid code,

Cursor statement failed with errors
Following statement failed with the errors.

cursor proj_cursor1 is (select projectID from

Setting a default timezone?
I have read about how to change the timezone in PHPMYADMIN, but it changes back, it doesn't STAY the

ScriptResource.axd gives an error on fresh install of ASP.NET Ajax 1.0
Hello,I have a fresh install of Microsoft ASP.NET Ajax 1.0. When I create an Ajax enabled website in

Preventing blank or already entered values
Im trying to learn how to place a read file line by line and prevent duplicate entries and also BLAN

MII Trends - add data onto chart object
Hello,

Can anyone please provide some thoughts on my current requirement:
its pretty

Sending CC Info by email
I am a little bit less knowledgable in the security area as most developers and I know I have a lot

Curl & sessions PLS HELP
Hello,

I have a problem with curl and sessions and i will try to explain the best i could.

trim function issues
Hi guys, total noob here...

So I've been tinkering around with a html and am using php to em

Insert to MySQL inside foreach
Hey.
I am parsing some html, and putting inside an html db.
I need to create a randomized inte