[數據結構]用C++實現雙鏈表的各種操作(包括頭刪,尾刪,插入,逆序,摧毀,清空等等)
//【數據結構】用C++實現雙鏈表的各種操作(包括頭刪,尾刪,插入,逆序,摧毀,清空等等)
//頭文件
#ifndef _LIST_H
#define _LIST_H
#include
using namespace std;
template
class DList;
template
class ListNode
{
friend class DList;
public:
ListNode() :data(Type()), next(NULL), prio(NULL)
{}
ListNode(Type d, ListNode *n = NULL,ListNode *m=NULL)
:data(d), next(n), prio(m)
{}
~ListNode()
{}
private:
Type data;
ListNode *next;
ListNode *prio;
};
template
class DList
{
public:
DList()
{
first = last = Buynode();
}
~DList()
{
destroy();
}
public:
void push_back(const Type &x) //尾插``
{
ListNode *s = Buynode(x);
last->next = s;
s->prio = last;
last = s;
first->data++;
}
void push_front(const Type &x) //頭插``
{
if (first->data == 0)
{
push_back(x);
return;
}
ListNode *s = Buynode(x);
s->next = first->next;
first->next->prio = s;
first->next = s;
s->prio = first;
last = s;
for (int i = 0; i < first->data; i++)
{
last = last->next;
}
first->data++;
}
void pop_back() //尾刪``
{
if (first->data == 0)
return;
ListNode *p = last;
last = last->prio;
last->next = NULL;
delete p;
first->data--;
}
void pop_front() //頭刪``
{
if (first->data == 0)
{
return;
}
else
{
ListNode *s = first->next;
if (first->data == 1)
{
delete s;
last = first;
last->next = NULL;
}
else
{
first->next = s->next;
s->next->prio = first;
delete s;
}
first->data--;
}
}
void insert_val(const Type &x) //按值插入``
{
ListNode *p = Buynode(x);
ListNode *s = first;
if (first->data == 0)
{
push_back(x);
return;
}
while (s->next->datanext->next != NULL)
{
s = s->next;
}
if (s->next->next == NULL)
{
if (s->next->data>x)
{
p->next = s->next;
s->next->prio = p;
s->next = p;
p->prio = s;
first->data++;
}
else
push_back(x);
}
else
{
p->next = s->next;
s->next->prio = p;
s->next = p;
p->prio = s;
first->data++;
}
}
void show_list() //顯示``
{
if (first->data == 0)
{
cout << "NULL" << endl;
return;
}
ListNode *q = first->next;
while (q != NULL)
{
cout << q->data << "->";
q = q->next;
}
cout << "NULL first->data=" << first->data <<" last->data="<data<< " last->next=" << last->next <<" "<< endl;
}
void sort() //排序``
{
if (first->data == 0)
{
return;
}
ListNode *p = first->next;
ListNode *q = p->next;
p->next = NULL;
last = p;
first->data = 1;
ListNode *r;
while (q != NULL)
{
insert_val(q->data);
r = q;
q = q->next;
delete r;
}
}
ListNode* find(const Type &x) //查找``
{
ListNode *s;
for (s = first->next; s != NULL; s = s->next)
{
if (s->data == x)
{
return s;
}
}
return NULL;
}
int length() //求長度``
{
return(first->data);
}
void delete_val(const Type &x) //按值刪除``
{
if (first->data == 0)
{
cout << "未找到該數:" << endl;
return;
}
else
{
ListNode *p = find(x);
if (p == NULL)
{
cout << "未找到該數:" << endl;
return;
}
ListNode *q = first;
while (q->next != p)
{
q = q->next;
}
if (q->next->next == NULL)
{
pop_back();
}
else
{
q->next = p->next;
p->next->prio = q;
delete p;
first->data--;
}
}
}
void clear() //清除``
{
if (first->data == 0)
return;
while (first->next != NULL)
{
pop_back();
}
}
void resver() //逆序``
{
if (first->data == 0)
{
return;
}
ListNode *p = first->next;
ListNode *q = p->next;
p->next = NULL;
last = p;
first->data = 1;
ListNode *r;
while (q != NULL)
{
push_front(q->data);
r = q;
q = q->next;
delete r;
}
}
void quit_system(int &a) //退出``
{
clear();
a = 0;
}
void destroy() //摧毀``
{
clear();
delete first;
}
protected:
ListNode* Buynode(Type x = Type())
{
ListNode *p = new ListNode(x);
return p;
}
private:
ListNode *first;
ListNode *last;
};
//主函數
#endif
#include"DList.h"
void main()
{
DList mylist;
int select = 1;
int Item;
//int pos;
while (select)
{
cout << "**************************************" << endl;
cout << "* [1] show_list [2] push_front *" << endl;
cout << "* [3] push_back [4] pop_front *" << endl;
cout << "* [5] pop_back [6] insert_val *" << endl;
cout << "* [7] find [8] delete_val *" << endl;
cout << "* [9]length [10] clear *" << endl;
cout << "* [11] quit_system [12] destroy *" << endl;
cout << "* [13] resver [14] sort *" << endl;
cout << "**************************************" << endl;
cout << "請選擇:>";
cin >> select;
switch (select)
{
case 1:
mylist.show_list();
break;
case 2:
cout << "請輸入要插入的值(-1結束):>";
while (cin >> Item, Item != -1)
{
mylist.push_front(Item);
}
break;
case 3:
cout << "請輸入要插入的值(-1結束):>";
while (cin >> Item, Item != -1)
{
mylist.push_back(Item);
}
break;
case 4:
mylist.pop_front();
;
break;
case 5:
mylist.pop_back();
break;
case 6:
cout << "請輸入要插入的值:>";
cin >> Item;
mylist.insert_val(Item);
break;
case 7:
cout << "請輸入要查找的數:";
cin >> Item;
cout << "該數的地址為:";
cout << mylist.find(Item) << endl;
break;
case 8:
cout << "請輸入要刪除的值:>";
cin >> Item;
mylist.delete_val(Item);
break;
case 9:
cout << "該順序表長度為:" << mylist.length() << endl;
break;
case 10:
mylist.clear();
break;
case 11:
mylist.quit_system(select);
break;
case 12:
mylist.destroy();
case 13:
mylist.resver();
break;
case 14:
mylist.sort();
break;
default:
break;
}
}
return;
}