链表C++模板实现

#include <iostream.h>
#include <stdlib.h>

//结点模板类
template <typename t1, typename t2>
class node{
private:
t1 data1;    //数据成员data1
t2 data2;    //数据成员data2
node<t1,t2> *next;  //后继结点指针
public:
node(t1 da1, t2 da2):data1(da1),data2(da2),next(NULL){}  //构造函数
~node(){}                        //析构函数
t1 getData1();                   //获得成员变量data1
t2 getData2();                   //获得成员变量data2
node<t1,t2> * getNext();         //获得后继结点地址
void setData1(t1 da1);           //设置成员变量data1
void setData2(t2 da2);           //设置成员变量data2
void setNext(node<t1,t2> * x);   //设置成员变量next

};

//链表模板类
template <typename t1,typename t2>
class list{
private:
int num;            //链表结点个数,不包括头结点
node<t1,t2> * head; //链表头结点指针
public:
list();  //构造函数
~list(); //析构函数
void insertFront(node<t1,t2> &x);     //头插法
void insertAfter(node<t1,t2> &x);     //尾插法
void insert(int i ,node<t1,t2> &x);   //在第i个结点处，插入一个结点
void deleteNode(int i);               //删除第i个结点
void setNode(int i ,t1 da1 ,t2 da2);  //设置第i个结点的值
void printAll();   //打印整个表
};

/*
node的成员函数
*/
template <typename t1,typename t2>  //返回数据域data1的值
t1 node<t1,t2>::getData1(){
return data1;
}

template <typename t1,typename t2> //返回数据域data2的值
t2 node<t1,t2>::getData2(){
return data2;
}

template <typename t1,typename t2>  //返回后继结点指针
node<t1,t2> * node<t1,t2>::getNext(){
return next;
}

template <typename t1,typename t2>  //设置数据域data1的值
void node<t1,t2>::setData1(t1 da1){
data1 = da1;
}

template <typename t1,typename t2>  //设置数据域data2的值
void node<t1,t2>::setData2(t2 da2){
data2 = da2;
}

template <typename t1,typename t2>  //设置后继结点指针
void node<t1,t2>::setNext(node<t1,t2> * x){
next = x;
}

/*
list的成员函数
*/
template <typename t1,typename t2>  //链表构造函数，创建头结点(头结点数值域没有意义，置为0)
list<t1,t2>::list() {
num=0;
head = new node<t1,t2>(0,0);
}

template <typename t1,typename t2>  //链表析构函数，依次释放各个节点，包括头结点
list<t1,t2>::~list(){
node<t1,t2> *p = head;
node<t1,t2> *q = head->getNext();
while(p){
q = p->getNext();
if(p != NULL)
delete p;
p = q;
}
}

//头插入
template <typename t1,typename t2>  //从head指向的结点处插入结点
void list<t1,t2>::insertFront( node<t1,t2> &x){
node<t1,t2> *p = head->getNext();
head->setNext(&x);
x.setNext(p);
num++;
}

//尾插入
template <typename t1,typename t2>  //从链表末尾插入结点
void list<t1,t2>::insertAfter(node<t1,t2> &x){
node<t1,t2> *p = head;
node<t1,t2> *q = NULL;
while(p){
q=p->getNext();
if(q==NULL)
p->setNext(&x);
p = q;
}
num++;
}

template <typename t1,typename t2>  //在第i个结点处插入结点
void list<t1,t2>::insert(int i , node<t1,t2> &x){
if(i==1)
insertFront(x);
else if(i>1 && i<=num){
num++;
int j = 0;
node<t1,t2> * p = head;
node<t1,t2> * q = NULL;
while(p){
j++;
p=p->getNext();
q=p->getNext();
if(j==i-1){
p->setNext(&x);
x.setNext(q);
break;
}
}
}
else {
cout<<"插入位置出错"<<endl;
exit(1);
}
}

template <typename t1,typename t2>   //删除第i个结点
void list<t1,t2>::deleteNode(int i){
if(i>=1 && i<=num){
int j = 0;
node<t1,t2> * p = head;
node<t1,t2> * q = NULL;
while(p){
if(j==i-1){
q = p->getNext();
p->setNext(q->getNext());
delete q;
num--;
break;
}
j++;
p=p->getNext();
}
}
else {
cout<<"删除位置出错"<<endl;
exit(1);
}
}

template <typename t1,typename t2> //设置第i个结点的数值域data1和data2
void list<t1,t2>::setNode(int i ,t1 da1 ,t2 da2){
int j =0;
node<t1,t2> *p = head;
while(p){
j++;
p=p->getNext();
if(j==i) {
p->setData1(da1);
p->setData2(da2);
}
}
}

template <typename t1,typename t2>   //打印整个列表
void list<t1,t2>::printAll(){
node<t1,t2> *p = head->getNext();
if(p == NULL)
cout<<"表为空"<<endl;
else {
int i = 1;
while(p) {
cout<<"第"<<i<<"结点"<<"data1="<<p->getData1()<<"	"<<"data2="<<p->getData2()<<endl;
i++;
p=p->getNext();
}
}

}

void main(){
//创建六个结点
node<int,int> *a = new node<int,int>(1,2);
node<int,int> *b = new node<int,int>(2,3);
node<int,int> *c = new node<int,int>(3,4);
node<int,int> *d = new node<int,int>(4,5);
node<int,int> *e = new node<int,int>(5,6);
node<int,int> *f = new node<int,int>(6,7);
list<int,int> z; //创建链表对象
//表尾插入6个结点
z.insertAfter(*a);
z.insertAfter(*b);
z.insertAfter(*c);
z.insertAfter(*d);
z.insertAfter(*e);
z.insertAfter(*f);
z.setNode(3,0,0); //设置第三个结点的data1为0，data2为0
z.deleteNode(6); //删除第6个结点
z.printAll(); //打印链表
}