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

why this query can delete duplicates ?
why this query can delete duplicates ? Anybody can give me the detailed explanation ?

Tha

Problem with Subscreen
Dear Experts ,
I am facing a problem with the subscreens. My senario is as follows :

recrawling
Can anyone suggest me how may i know a page is updated before it is being downloaded, so that i can

connect() succeeds but accept() does not?
Please help me with this problem. I'm working on a time-sensitive project where I'm using TCP socket

Replacing a string on click of a button
Hi! Is there a way to replace a string on a click of a text link?

This is what I've come up w

1,000 select boxes with 100 options?!
I have 1 drop down select box with 1,000 options.


In some case, there will be 100+ of the

disable all input buttons
Hello Friends,

suppose i do have a file ( file.php ) has a submit button

Code: [Sele

Help with php code
Hello, can anyone tell me why this php word trap fails to work,
and the trigger words get blow r

need help in creating captcha
hi i have a problem creating captcha system. i create some basic script for image displaying but it

losing variables between php brackets
Hi

have got this code:
Code: $id=mysql_result($result,0,"itemid");
$title=mys