public class Test {
public static void main(String[] args) {
try{
LinkList list1 = new LinkList();
LinkList list2 = new LinkList();
LinkList list3 = null;
list1.addAt(0, new Item(1, 5));
list1.addAt(1, new Item(-1.5, 3));
list1.addAt(2, new Item(1, 1));
list2.addAt(0, new Item(0.5, 5));
list2.addAt(1, new Item(0.5, 4));
list2.addAt(2, new Item(1.5, 3));
list2.addAt(3, new Item(3, 0));
list3 = mergeLinkList(list1, list2);
System.out.println("一元多项式的相加过程:");
list1.listAll();
System.out.println(" + ");
list2.listAll();
System.out.println(" = ");
list3.listAll();
}
catch(Exception e){
e.printStackTrace();
}
}
/**
* 一元多项式的一般项类
*/
class Item{
private double coef; //一元多项式的一般项的系数
private int exp; //一元多项式的一般项的指数
public Item(){
this.coef = 0.0;
this.exp = 0;
}
public Item(double coef, int exp){
this.coef = coef;
this.exp = exp;
}
public double getCoef(){
return this.coef;
}
public void setCoef(double coef){
this.coef = coef;
}
public int getExp(){
return this.exp;
}
public void setExp(int exp){
this.exp = exp;
}
}
/**
* 链表结点类
*/
class Node{
private Item data;
private Node next; //链表结点的指针域,指向直接后继结点
public Node(){
data = null;
next = null;
}
public Node(Item data, Node next){
this.data = data;
this.next = next;
}
public Item getData(){
return this.data;
}
public void setData(Item data){
this.data = data;
}
public Node getNext(){
return this.next;
}
public void setNext(Node next){
this.next = next;
}
}
/**
* 链表类
*/
class LinkList{
private Node head = null; //头结点指针
private int size = 0;
public LinkList(){
head = new Node();
size = 0;
}
//在i位置插入元素elem
public boolean addAt(int i, Item elem) {
if(i < 0 || i > size){
return false;
}
Node pre,curr;
int pos;
for(pre=head; i>0 && pre.getNext()!=null; i--,pre=pre.getNext());
curr = new Node(elem, pre.getNext());
pre.setNext(curr);
size++;
return true;
}
//删除i位置的元素
public boolean removeAt(int i) {
if(i < 0 || i >= size){
return false;
}
Node pre,curr;
for(pre=head; i>0 && pre.getNext()!=null; i--,pre=pre.getNext());
curr = pre.getNext();
pre.setNext(curr.getNext());
size--;
return true;
}