直接上代码了,说明看注释就可以:
利用静态成员构建链表
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#include <IOSTREAM.H> class Node { public : Node( int val, Node* next):val(val),next(next){} //~Node(){cout<<"del "<<val<<endl;} static void showAll(); //打印全部节点的值 static void insertHead( int ); //头插 static void insertTail( int ); //尾插 static void delHead(); //删头 static void delTail(); //删尾 static void clear(); //清空 protected : int val; Node *next; static Node *head; private : }; Node* Node::head = 0; void Node::showAll(){ //打印全部节点的值 Node *p = head; while (p) { cout<<p->val<< " " ; p = p->next; } cout<<endl; } void Node::insertHead( int val){ //头插 Node *p = new Node(val, head); head = p; } void Node::insertTail( int val){ //尾插 Node *p = new Node(val, 0); if (!head) { head = p; return ; } Node *q = head; while (q->next) { q = q->next; } q->next = p; } void Node::delHead(){ //删头 Node *p = head; if (head) { head = head->next; delete p; } } void Node::delTail(){ //删尾 if (!head) { return ; } if (!(head->next)) { delete (head); head = NULL; return ; } Node *p = head; while (p->next->next) { p = p->next; } delete (p->next); p->next = NULL; } void Node::clear(){ //清空 Node *p = head; Node *q = 0; head = 0; while (p) { q = p; p = p->next; delete q; } } void main(){ Node::delHead(); Node::delTail(); Node::insertTail(2); Node::delTail(); for ( int i = 0; i < 10; i++) { Node::insertTail(i + 1); } Node::delTail(); Node::showAll(); } |
利用类模板构建链表
这有点类似于list<>:
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#include <iostream> #include <string> using namespace std; template < class T> class Node //创建一个类模板,一个可以放入任何类型节点的链表 { public : Node(T val, Node* next):val(val),next(next){} static void showAll(); //打印全部节点的值 static void insertHead(T); //头插 static void insertTail(T); //尾插 static void delHead(); //删头 static void delTail(); //删尾 static void clear(); //清空 protected : T val; Node *next; static Node *head; private : }; template < class T> Node<T>* Node<T>::head = 0; template < class T> void Node<T>::showAll(){ //打印全部节点的值 Node *p = head; while (p) { cout<<p->val<< " " ; p = p->next; } cout<<endl; } template < class T> void Node<T>::insertHead(T val){ //头插 Node *p = new Node(val, head); head = p; } template < class T> void Node<T>::insertTail(T val){ //尾插 Node *p = new Node(val, 0); if (!head) { head = p; return ; } Node *q = head; while (q->next) { q = q->next; } q->next = p; } template < class T> void Node<T>::delHead(){ //删头 Node *p = head; if (head) { head = head->next; delete p; } } template < class T> void Node<T>::delTail(){ //删尾 if (!head) { return ; } if (!(head->next)) { delete (head); head = NULL; return ; } Node *p = head; while (p->next->next) { p = p->next; } delete (p->next); p->next = NULL; } template < class T> void Node<T>::clear(){ //清空 Node *p = head; Node *q = 0; head = 0; while (p) { q = p; p = p->next; delete q; } } class Student //创建一个自定义的学生类 { public : Student(string name, int age, char sex):name(name), age(age), sex(sex){} void showInfo(){ cout<< "姓名:" <<name<< " 年龄:" <<age<< " 性别:" <<sex<<endl; } protected : string name; int age; char sex; private : }; void Node<Student>::showAll(){ //学生类节点和其他基本数据类型不同,不能直接用<<输出,所以重载showAll() Node *p = head; while (p) { p->val.showInfo(); p = p->next; } } void main(){ for ( int i = 1; i < 10; i++) { Node< int >::insertTail(i); //这时Node<int>称为一个用类模板生成的模板类 Node< float >::insertTail(i / 10.0f); Node< double >::insertTail(i / 10.00); Node<Student>::insertTail(Student( "stu" , i, 'F' )); } Node< int >::showAll(); Node< float >::showAll(); Node< double >::showAll(); Node<Student>::showAll(); } |