#ifndef _DCLIST_
#define _DCLIST_
#include<iostream>
using namespace std;
#include<assert.h>
template <class Type>class DCList;
template<class Type>
class Node
{
friend class DCList<Type>;
public:
Node():data(0),prio(NULL),next(NULL){}
Node(Type d,Node<Type>*p=NULL,Node<Type>*n=NULL) :data(d), prio(p), next(n)
{}
~Node(){}
void SetData(Type d)
{
data = d;
}
Type GetData()const
{
return data;
}
private:
Node<Type>* prio;
Node<Type>* next;
Type data;
};
template <class Type>
class DCList
{
public:
DCList()
{
Node<Type>*s = _Buynode(0);
first = last=s;
first->prio = last;
last->next = first;
size = 0;
}
~DCList(){}
Node<Type>* _Buynode(const Type&x)
{
Node<Type>*s = new Node<Type>(x);
assert(s != NULL);
return s;
}
public:
bool push_back(const Type&x)
{
Node<Type>* s = _Buynode(x);
s->prio = last;
last->next = s;
last = s;
s->next = first;
first->prio = last;
size++;
return true;
}
bool push_front(const Type &x)
{
if (size == 0)
push_back(x);
Node<Type>* s = _Buynode(x);
s->next = first->next;
first->next->prio = s;
first->next = s;
s->prio = first;
size++;
return true;
}
void show_list()
{
if (size == 0)
return;
Node<Type>*p = first;
while (p->next != first)
{
p = p->next;
cout << p->data << "<==>";
}
cout << "ok!" << endl;
}
void pop_back()
{
if (size == 0)
return;
Node<Type>*p = last;
last = last->prio;
last->next = first;
first->prio = last;
delete p;
size--;
}
void pop_front()
{
if (size == 0)
return;
if (size == 1)
pop_back();
else
{
Node<Type>*p = first->next;
first->next = p->next;
p->next->prio = first;
delete p;
size--;
}
}
bool insert_val(const Type&x)
{
if (size == 0)
push_back(x);
else
{
Node<Type>*p = _Buynode(x);
Node<Type>*q = first->next;
while (q != first && q->data < p->data)
{
q = q->next;
}
if (q == first)
{
push_back(x);
}
else
{
p->prio = q->prio;
q->prio->next = p;
p->next = q;
q->prio = p;
size++;
}
}
return true;
}
Node<Type>* find(const Type&x)
{
if (size == 0)
{
cout << "链表为空" << endl;
return NULL;
}
Node<Type>*q = _Buynode(x);
Node<Type>*p = first->next;
while (p != first && q->data != p->data)
p = p->next;
if (p == first)
{
//cout << "未能在链表中找到" << x <<endl;
return NULL;
}
return p;
}
bool delete_val(const Type&x)
{
if (size == 0)
return false;
Node<Type>*p = find(x);
if (p == NULL)
{
cout << "链表中不存在" << x << "无法删除" << endl;
return false;
}
if (p == last)
{
pop_back();
}
else
{
p->prio->next = p->next;
p->next->prio = p->prio;
delete p;
size--;
}
return true;
}
void sort()
{
if (size == 0 || size == 1)
return;
Node<Type>*s = first->next;
Node<Type>*p = s->next;
last = s;
s->next = first;
first->prio = s;
while (p != first)
{
s = p;
p = p->next;
Node<Type>*q = first->next;
while (q != first && q->data < s->data)
{
q = q->next;
}
if (q == first)
push_back(s->data);
else
{
s->prio = q->prio;
q->prio->next = s;
s->next = q;
q->prio = s;
}
}
}
void resver()
{
if (size == 0 || size == 1)
return;
Node<Type>*s = first->next;
Node<Type>*p = s->next;
last = s;
s->next = first;
first->prio = s;
while (p != first)
{
s = p;
p = p->next;
push_front(s->data);
}
}
int length(){ return size; }
bool next(const Type&x)
{
if (size == 0)
return false;
Node<Type>*p;
p=find(x);
if (p == NULL)
{
cout << "链表中不存在" << x << endl;
return false;
}
if (p == last)
{
cout << x << "的后继是头结点"<< endl;
//return true;
}
else
{
cout << x << "的后继是" << p->next->data << endl;
}
return true;
}bool prio(const Type&x)
{
if (size == 0)
return false;
Node<Type>*p;
p = find(x);
if (p == NULL)
{
cout << "链表中不存在" << x << endl;
return false;
}
if (p == first->next)
{
cout << x << "的前驱是头结点" << endl;
//return true;
}
else
{
cout << x << "的前驱是" << p->prio->data << endl;
}
return true;
}
void clear()
{
if (size == 0)
return;
Node<Type>*p = first->next;
while (p != first)
{
//Node<Type>*q = p;
//p = p->next;
first->next = p->next;
p->next->prio = first;
delete p;
p = first->next;
size--;
}
last = first ;//first=last再次开辟空间会少开辟
size = 0;
}
private:
Node<Type>* first;
Node<Type>* last;
size_t size;
};
#endif
#include"DCList.h"
void main()
{
DCList<int> mylist;
int Item;
int select = 1;
Node<int>* p;
while (select)
{
cout << "************************************" << endl;
cout << "* [1] push_back [2] push_front *" << endl;
cout << "* [3] show_list [4] pop_back *" << endl;
cout << "* [5] pop_fornt [6] insert_val *" << endl;
cout << "* [7] length [8] find *" << endl;
cout << "* [9] merge [10] delete_val*" << endl;
cout << "* [11] sort [12] resver *" << endl;
cout << "* [13] next [14] prio *" << endl;
cout << "* [15] clear [0] quit_system*" << endl;
cout << "************************************" << endl;
cout << "请选择服务项目:>";
cin >> select;
switch (select)
{
case 1:
cout << "请输入要插入的数据(-1结束):>";
while (cin >> Item, Item != -1)
{
mylist.push_back(Item);
}
break;
case 2:
cout << "请输入要插入的数据(-1结束):>";
while (cin >> Item, Item != -1)
{
mylist.push_front(Item);
}
break;
case 3:
mylist.show_list();
break;
case 4:
mylist.pop_back();
break;
case 5:
mylist.pop_front();
break;
case 6:
cout << "请输入要插入的值:>";
cin >> Item;
mylist.insert_val(Item);
break;
case 7:
cout << "顺序表的长度为:>" << mylist.length() << endl;
break;
case 8:
cout << "请输入要查找的值:>";
cin >> Item;
p = mylist.find(Item);
if (p == NULL)
{
cout << "要查找的数据不存在." << endl;
}
break;
case 9:
break;
case 10:
cout << "请输入要删除的值:>";
cin >> Item;
mylist.delete_val(Item);
break;
case 11:
mylist.sort();
break;
case 12:
mylist.resver();
break;
case 13:
cout << "请输入要查后继的数";
cin >> Item;
mylist.next(Item);
break;
case 14:
cout << "请输入要查前驱的数";
cin >> Item;
mylist.prio(Item);
break;
case 15:
mylist.clear();
break;
default:
break;
}
}
system("pause");
}
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时间： 2024-10-15 21:43:30