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

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result
what is wrong with this

Code: [Select]<?php
if ($_SERVER['HTTP_REFERER'])
{

getting rid of quotes in strings
sick of trying to deal with them in multiple ways (entering in and taking from database, echoing, ec

upgrade from 4.7 to ECC 6.0
Hi all,
we are going to do an upgrade from R/3 4.7 to ECC 6.0. I need to know if i can find som

Strip Slashes Help
I've got a script that i've downloaded of the net to edit multiple fields from my sql database, and

Find only certain URLs from page ... regex (semi-complete script)
Hi guys,

What I need to do is take a page & extract all the URLs from the page &a

passthru() help
Hi everyone,
I'm new to the forum and to PHP. I have some pretty good experience writing shell sc

Matchcode in ALV change header column
Hello everyone,

I am working in an SAP system that is currently in upgrade and conversion

Join Query Help
Hi all,

I am having problems with the below code, which we shall call 'my first join query'!

curl javascript problem
Hi Experts.
I'm new curl and wanna to get some info from this http://www.amadeus.net/

when

Breaking results into week blocks
I have a set of dates (and times), which are returned from a mySQL query.

These usually span