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

how to transport the Query and insfoset
Hi

I have created the query using SQ01........
How to created T-code for query..

Help with looping
I have a comma separated list of colors taken from a database ($ICo) and a directory of images named

Save username into DB
OkaY so I got my blog to actually save the posts and whatever, all I need now is for it to keep the

Search in the PHP Files
have to search asterisk(*) in the php code of the php files .
In the html page one text box

I need help with formatting date from mysql! with php!
Hello guys

*Note: this is a php question not MySQL question, please do not move it to mysql s

Casting Decimals in Oracle
This code worked as a query in DB2, but I am not sure what the syntax is for casting decimals in Ora

problems with script
I made a small script wich exchanges points in my website:


<?php
session_start

How to get the previous months last date....
Here's my wittle problem. I suck at working with dates.

So today is 10/20/2009, i need to fig

explode() function problem maybe
Hi I'm having trouble searching my database. When I type two words in the search field it only searc

Can we convert non uni code system into unicode
Hi All,

Presently i am using non-unicode system and the sap version is 4.7.
Can i c