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DouLinkList.cpp
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DouLinkList.cpp
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#include "DouLinkList.h"
//默认构造函数
template<class T>
DouLinkList<T>::DouLinkList()
{
Head = new Node<T>;
Head->Next = nullptr;
Head->Prior = nullptr;
}
//带参构造函数
template<class T>
DouLinkList<T>::DouLinkList(T* data,int Len)
{
Head = new Node<T>;
Head->Next = nullptr;
Head->Prior = nullptr;
Node<T>* sign = Head;
for(int i=0;i<Len;i++)
{
Node<T>* p = new Node<T>;
p->Data = data[i];
p->Prior = sign;
p->Next = sign->Next;
sign->Next->Prior = p;
sign->Next = p;
sign = p;
}
}
//析构函数
template<class T>
DouLinkList<T>::~DouLinkList()
{
if(Head)
{
while(Head->Next)
ele_delete(1);
delete Head;
Head = nullptr;
}
}
//获取头节点
template<class T>
Node<T>* DouLinkList<T>::get_head()
{
return Head;
}
//向指定位置插入元素
template<class T>
void DouLinkList<T>::ele_insert(T data, int posi)
{
Node<T>* sign = Head;
for(int i=1;i<posi;i++)
{
sign = sign->Next;
if(sign == nullptr)
throw"out of size";
}
Node<T>* p = new Node<T>;
p->Data = data;
p->Next = sign->Next;
p->Prior = sign;
sign->Next->Prior = p;
sign->Next = p;
}
//删除指定位置元素
template<class T>
void DouLinkList<T>::ele_delete(int posi)
{
Node<T>* sign = Head;
for(int i=0;i<posi;i++)
{
sign = sign->Next;
if(sign == nullptr)
throw"out of size";
}
sign->Prior->Next = sign->Next;
sign->Next->Prior = sign->Prior;
delete sign;
sign = nullptr;
}
//查询指定元素是否在链表中,若存在,返回第一个的位置,若不存在,返回-1
template<class T>
int DouLinkList<T>::ele_locate(T data)
{
Node<T>* sign = Head->Next;
int posi = 1;
while(sign)
{
if(sign->Data==data)
return posi;
sign = sign->Next;
posi++;
}
return -1;
}
//将指定位置元素修改为指定值
template<class T>
void DouLinkList<T>::ele_modify(int posi, T data)
{
Node<T>* sign = Head;
for(int i=0;i<posi;i++)
{
sign = sign->Next;
if(sign == nullptr)
throw"out of size";
}
sign->Data = data;
}
//获取链表尾部元素
template<class T>
Node<T>* DouLinkList<T>::get_back()
{
Node<T>* sign = Head;
while(sign->Next)
sign = sign->Next;
return sign;
}
//移动到链表指定位置
template<class T>
Node<T>* DouLinkList<T>::move_to(int posi)
{
Node<T>* sign = Head;
for(int i=0;i<posi;i++)
{
sign = sign->Next;
if(sign == nullptr)
throw"out of size";
}
return sign;
}