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 Like 44 Dislike
Previous forums Next forums
Other forums

How to give the privillege for triggers?
Hi,

How to give the privillage for triggers to particular user?

Please let me

how to configure ADS in ABAP instance
Hi All,

I am working on r/3 4.7 ABAP system.Can we configure ADS(adobe document services)

How to store checkbox array in a session, and then be able to add to it?
I'm trying to store an array of checkbox values into a session array, sort of like a shopping cart,

php multiple action on submit
I have a form which says:

<form enctype='multipart/form-data' method='post' action='pr

frames get header location..
i have two frames, one top, one bottom. how do i do a form on the bottom frame that gives me the ur

LOOPing Problem
Hello All!

The following code loops through the data and displays the data accordingly. My p

help with Get_
ok some how this is not working i am not sure what i am doing wrong here but what this does is when

Struct/union and scope problem!
HI all , I have
Code: in header.h typedef struct Node Link; /* ---------

array_map() probably obvious mistake
The code below is part of a class to escape strings, but should also accept an array, using array_ma

$_GET problem
Hi all,

Have a bit of a problem with a little piece of code, I am not sure if this should be

Sign up to write
Sign up now if you have flare of writing..
Login   |   Register
Follow Us
Indyaspeak @ Facebook Indyaspeak @ Twitter Indyaspeak @ Pinterest RSS



Play Free Quiz and Win Cash