单链表循环链表多项式及其相加双向链表稀疏矩阵(参考课件)

// obtain the address of the next node
Node<T> *NextNode(void) const; };
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// constructor. initialize data and // pointer members
template <class T>
Node<T>::Node(const T& item, Node<T>* ptrnext) : data(item), next(ptrnext)）
// return the pointer to the unlinked node return tempPtr;
}
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2．人工建立一个链表
void main(void) { Node<char>*a,*b,*c; a=new Node<char>('a');
b=new Node<char>('b'); c=new Node<char>('c'); Node<char>*head,*p; head=new Node<char>(' '); p=head; head->InsertAfter(a); head->InsertAfter(b); head->InsertAfter(c); while(p!=NULL) { cout << p->data<<" ";
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// delete the node following current and return its address
template <class T> Node<T>* Node<T>::DeleteAfter(void) { // save address of node to be deleted
Node<T>* tempPtr = next; // if there isn't a successor, return NULL
if (next == NULL) return NULL;
// current node points to successor of tempPtr. next = tempPtr->next;
几个结点，前一个结点的指针， 指向后一个结点，就连接成一个 线性链表。
线性链表的优点则是插入，删除 快捷，缺点是选取复杂。
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1. 结点类的定义
#include <stdlib.h〉 #include <iostream.h> template <class T> class Node { Node<T> *next; //next 是下一个结点的地址
template <class T> void Node<T>::InsertAfter(Node<T> *p) {
// p points to successor of the current // node, and current node points to p.
p->next = next; next = p; }
{ Node<T> *newNode;
// allocate memory while passing item and NextPtr to
// constructor. terminate program if allocation fails
newNode = new Node<T>(item, nextPtr);
if (newNode == NULL)
{ cerr << "Memory allocation failure!" << endl;
exit(1); }
return newNode;
}
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enum AppendNewline {noNewline, addNewline}; template <class T> // print a linked list void PrintList (Node<T> *head,
p=p->NextNode( ); } } 测试结果：打印 c b a
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3. 定义线性链表的一些操作
#include "node.h"
// allocate a node with data member item and pointer nextPtr
template <class T>
Node<T>*GetNode(constT&item,Node<T>*nextPtr = NULL)
if(addnl == addNewline) cout << currPtr->data << endl;
{}
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// return value of private member next
template <class T>
Node<T>* Node<T>::NextNode(void) const
{ return next;
}
7Leabharlann Baidu
// insert a node p after the current one
public: T data; // the data is public
Node(const T& item, Node<T>* ptrnext=NULL);
// list modification methods
void InsertAfter(Node<T> *p); Node<T> * DeleteAfter(void);
单链表 循环链表 多项式及其相加 双向链表 稀疏矩阵
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一、单链表
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线性表的链式表示
顺序表的优点是可以随机选取表中元素 缺点是插入删除操作复杂。 用指针将互不相连的内存结点串成的 线性表叫线性链表。 结点 node 由一个数据元素域，一个或几个 指针域组成。单链表的结点只有一个指针域。
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AppendNewline addnl = noNewline ) { // currPtr chains through the list, starting at head
Node<T> *currPtr = head; // print the current node's data until end of list while(currPtr != NULL) { // output newline if addl == addNewline