Java code help with polynomail, having the user input polynomails of addition, subtraction, derivatives, scalar, etc. the polynomial needs to be inputed in a sequence of coefficents and exponents and for them into a linked polynomial using this code.

public class Term { private int coeff; private int exp; public Term(int c, int e) { coeff = c; exp = e; }

public void setCoeff(int c) { coeff = c; } public int getCoeff() { return coeff; }

public void setExpon(int e) { exp = e; } public int getExpon() { return exp; } }

public class AddPolys { private ObjectList sum;

public AddPolys() { sum = new ObjectList(); } private void attach(int coeff, int exp) { Term t = new Term(coeff, exp); sum.addLast(t); }

public ObjectList sumTwoPolys(ObjectList list1, ObjectList list2) { ObjectListNode p = list1.getFirstNode(); ObjectListNode q = list2.getFirstNode();

while (p != null && q != null) { Term t1 = (Term) p.getInfo(); Term t2 = (Term) q.getInfo(); if (t1.getExpon() == t2.getExpon()) { int coeff = t1.getCoeff() + t2.getCoeff(); if (coeff != 0) attach(coeff, t1.getExpon()); p = p.getNext(); q = q.getNext(); } else if (t1.getExpon() > t2.getExpon()) { attach(t1.getCoeff(), t1.getExpon()); p = p.getNext(); } else { attach(t2.getCoeff(), t2.getExpon()); q = q.getNext(); } } while (p != null) { Term t1 = (Term) p.getInfo(); attach(t1.getCoeff(), t1.getExpon()); p = p.getNext(); } while (q != null) { Term t2 = (Term) q.getInfo(); attach(t2.getCoeff(), t2.getExpon()); q = q.getNext(); } return sum; }

Here is the prompt below:

Write a method that will input a sequence of coefficients and exponents and form them into a linked polynomial as described earlier.

Write a method that will subtract two polynomials.

Write a method that will compute the first, second, and third derivative of a polynomial

Write a method that will multiply a polynomial by a scalar.

Write a method that, given a polynomial and an integer, evaluates th polynomial at that number

Write a method that will print a polynomial as a sequence of coefficients a exponents, arranged attractively. Be sure to include an appropriate driver for your code and send all program

Here is my code. But the user can't input it. how do i fix my code in eclipse using java to allow users to input polynomails?

please give code and screenshot of the problem. and outcome.

public class Polynomial {

private int[] coef;

private int deg;

public Polynomial(int a, int b) {

coef = new int[b+1];

coef[b] = a;

deg = degree();

}

// return c = a + b

public Polynomial plus(Polynomial b) {

Polynomial a = this;

Polynomial c = new Polynomial(0, Math.max(a.deg, b.deg));

for (int i = 0; i <= a.deg; i++) c.coef[i] += a.coef[i];

for (int i = 0; i <= b.deg; i++) c.coef[i] += b.coef[i];

c.deg = c.degree();

return c;

}

// return (a - b)

public Polynomial minus(Polynomial b) {

Polynomial a = this;

Polynomial c = new Polynomial(0, Math.max(a.deg, b.deg));

for (int i = 0; i <= a.deg; i++) c.coef[i] += a.coef[i];

for (int i = 0; i <= b.deg; i++) c.coef[i] -= b.coef[i];

c.deg = c.degree();

return c;

}

// return (a * b)

public Polynomial mul(Polynomial b) {

Polynomial a = this;

Polynomial c = new Polynomial(0, a.deg + b.deg);

for (int i = 0; i <= a.deg; i++)

for (int j = 0; j <= b.deg; j++)

c.coef[i+j] += (a.coef[i] * b.coef[j]);

c.deg = c.degree();

return c;

}

public boolean eq(Polynomial b) {

Polynomial a = this;

if (a.deg != b.deg) return false;

for (int i = a.deg; i >= 0; i--)

if (a.coef[i] != b.coef[i]) return false;

return true;

}

public int degree() {

int d = 0;

for (int i = 0; i < coef.length; i++)

if (coef[i] != 0) d = i;

return d;

}

// use Horner's method to compute and return the polynomial evaluated at x

public int evaluate(int x) {

int p = 0;

for (int i = deg; i >= 0; i--)

p = coef[i] + (x * p);

return p;

}

// differentiate this Polynomial and return it

public Polynomial differentiate() {

if (deg == 0) return new Polynomial(0, 0);

Polynomial deriv = new Polynomial(0, deg - 1);

deriv.deg = deg - 1;

for (int i = 0; i < deg; i++)

deriv.coef[i] = (i + 1) * coef[i + 1];

return deriv;

}

// convert to string representation

public String toString() {

if (deg == 0) return "" + coef[0];

if (deg == 1) return coef[1] + "x + " + coef[0];

String s = coef[deg] + "x^" + deg;

for (int i = deg-1; i >= 0; i--) {

if (coef[i] == 0) continue;

else if (coef[i] > 0) s = s + " + " + ( coef[i]);

else if (coef[i] < 0) s = s + " - " + (-coef[i]);

if (i == 1) s = s + "x";

else if (i > 1) s = s + "x^" + i;

}

return s;

}

// test client

public static void main(String[] args) {

Polynomial zero = new Polynomial(0, 0);

Polynomial p1 = new Polynomial(5, 3);

Polynomial p2 = new Polynomial(3, 2);

Polynomial p3 = new Polynomial(6, 4);

Polynomial p4 = new Polynomial(7, 1);

Polynomial p = p1.plus(p2).plus(p3).plus(p4);

Polynomial q1 = new Polynomial(7, 2);

Polynomial q2 = new Polynomial(2, 0);

Polynomial q = q1.plus(q2);

/* To Add Both Polynomial */

Polynomial r = p.plus(q);

/* Multiply Both Polynomial */

Polynomial s = p.mul(q);

System.out.println("p(x) = " + p);

System.out.println("q(x) = " + q);

System.out.println("p(x) + q(x) = " + r);

System.out.println("q(x) - p(x) = " + q.minus(p));

System.out.println("p(x) * q(x) = " + s);

System.out.println("p(3) = " + p.evaluate(3));

System.out.println("p'(x) = " + p.differentiate());

System.out.println("p''(x) = " + p.differentiate().differentiate());

System.out.println("p'''(x) = " + p.differentiate().differentiate().differentiate());

}

}