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

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

timed header image rotation
I have a joomla site and I was trying to setup a rotating image based on timing NOT just refreshing

Rounding a number queried from a database
I know that to display a rounded number you just do echo "round($number)";. But how would

Finding digits in variable containing text, and IDing them
$romanstock = "http://www.remoteprice.com/data.asp?storeid=123&itemcode=456&typ

[PHP HELP] Php order form.
Hello to everyone @ phpfreaks. Im new to this site and hope to learn lots of things here.

Fir

Passing variables with pagination - iterating through unique id per link
Hi everyone,
I have seen a few topics like this one. Still cant find the specific thing, so I am

PHP FTP Can't upload Big FIles
Anyone had any success using FTP to upload a file say 90m?

im using ftp_put and it returns fa

Values disappear from my array :( HELP!
hey all, I have a lil mysql/php/apache script that queries a database
and pulls put 5 integers.

Script not running properly
Hello Everyone
This is a basic script for posting to a database. I'm not sure why it doesn't work

Simple Variable Question
Hi everyone.... again,

I am really getting into php still. Learning more every day. I love it