J'ai écrit un programme qui crée des nœuds qui dans cette classe sont des parties de polynômes, puis les deux polynômes sont additionnés pour devenir un polynôme (liste de nœuds) . Tout mon code se compile donc le seul problème que j'ai est que les noeuds n'insèrent pas dans le polynôme via la méthode d'insertion que j'ai dans polynomial.java et quand ils exécutent le programme, ils créent des noeuds et les affichent au format 2x^2 quand il s'agit d'ajouter les polynômes ensemble, il affiche o comme les polynômes, donc si quelqu'un peut comprendre ce qui ne va pas et ce que je peux faire pour le réparer, il serait très apprécié.Ajout de polynômes (listes chaînées) ...... Aide sur les bogues
Voici le code:
import java.util.Scanner;
class Polynomial{
public termNode head;
public Polynomial()
{
head = null;
}
public boolean isEmpty()
{
return (head == null);
}
public void display()
{
if (head == null)
System.out.print("0");
else
for(termNode cur = head; cur != null; cur = cur.getNext())
{
System.out.println(cur);
}
}
public void insert(termNode newNode)
{
termNode prev = null;
termNode cur = head;
while (cur!=null && (newNode.compareTo(cur)<0))
{
prev = null;
cur = cur.getNext();
}
if (prev == null)
{
newNode.setNext(head);
head = newNode;
}
else
{
newNode.setNext(cur);
prev.setNext(newNode);
}
}
public void readPolynomial(Scanner kb)
{
boolean done = false;
double coefficient;
int exponent;
termNode term;
head = null; //UNLINK ANY PREVIOUS POLYNOMIAL
System.out.println("Enter 0 and 0 to end.");
System.out.print("coefficient: ");
coefficient = kb.nextDouble();
System.out.println(coefficient);
System.out.print("exponent: ");
exponent = kb.nextInt();
System.out.println(exponent);
done = (coefficient == 0 && exponent == 0);
while(!done)
{
Polynomial poly = new Polynomial();
term = new termNode(coefficient,exponent);
System.out.println(term);
poly.insert(term);
System.out.println("Enter 0 and 0 to end.");
System.out.print("coefficient: ");
coefficient = kb.nextDouble();
System.out.println(coefficient);
System.out.print("exponent: ");
exponent = kb.nextInt();
System.out.println(exponent);
done = (coefficient==0 && exponent==0);
}
}
public static Polynomial add(Polynomial p, Polynomial q)
{
Polynomial r = new Polynomial();
double coefficient;
int exponent;
termNode first = p.head;
termNode second = q.head;
termNode sum = r.head;
termNode term;
while (first != null && second != null)
{
if (first.getExp() == second.getExp())
{
if (first.getCoeff() != 0 && second.getCoeff() != 0);
{
double addCoeff = first.getCoeff() + second.getCoeff();
term = new termNode(addCoeff,first.getExp());
sum.setNext(term);
first.getNext();
second.getNext();
}
}
else if (first.getExp() < second.getExp())
{
sum.setNext(second);
term = new termNode(second.getCoeff(),second.getExp());
sum.setNext(term);
second.getNext();
}
else
{
sum.setNext(first);
term = new termNode(first.getNext());
sum.setNext(term);
first.getNext();
}
}
while (first != null)
{
sum.setNext(first);
}
while (second != null)
{
sum.setNext(second);
}
return r;
}
}
Voici ma classe Node:
class termNode implements Comparable
{
private int exp;
private double coeff;
private termNode next;
public termNode(double coefficient, int exponent)
{
coeff = coefficient;
exp = exponent;
next = null;
}
public termNode(termNode inTermNode)
{
coeff = inTermNode.coeff;
exp = inTermNode.exp;
}
public void setData(double coefficient, int exponent)
{
coefficient = coeff;
exponent = exp;
}
public double getCoeff()
{
return coeff;
}
public int getExp()
{
return exp;
}
public void setNext(termNode link)
{
next = link;
}
public termNode getNext()
{
return next;
}
public String toString()
{
if (exp == 0)
{
return(coeff + " ");
}
else if (exp == 1)
{
return(coeff + "x");
}
else
{
return(coeff + "x^" + exp);
}
}
public int compareTo(Object other)
{
if(exp ==((termNode) other).exp)
return 0;
else if(exp < ((termNode) other).exp)
return -1;
else
return 1;
}
}
Et voici ma classe de test pour exécuter le programme.
import java.util.Scanner;
class PolyTest{
public static void main(String [] args)
{
Scanner kb = new Scanner(System.in);
Polynomial r;
Polynomial p = new Polynomial();
System.out.println("Enter first polynomial.");
p.readPolynomial(kb);
Polynomial q = new Polynomial();
System.out.println();
System.out.println("Enter second polynomial.");
q.readPolynomial(kb);
r = Polynomial.add(p,q);
System.out.println();
System.out.print("The sum of ");
p.display();
System.out.print(" and ");
q.display();
System.out.print(" is ");
r.display();
}
}
Ok merci, je l'ai changé mais il retourne toujours 0 –