#ifndef LIST_H
#define LIST_H
class List
{
public:
List(int size);
~List();
void DestroyList();
void ClearList();
bool ListEmpty();
int ListLength();
bool GetElem(int i, int *e);
int LocateElem(int *e);
bool ListInsert(int i, int *e);
bool ListDelete(int i, int *e);
bool PriorElem(int *currentElem, int *preElem);
bool NextElem(int *currentElem, int *NextElem);
void ListTraverse();
private:
int *m_pList;
int m_iSize;
int m_iLength;
};
#endif

#include"LIst.h"
#include<iostream>
using namespace std;
List::List(int size)
{
m_iSize = size;
m_pList = new int[m_iSize]; //申請堆內存 
m_iLength = 0;
}
List::~List()
{
delete []m_pList;
m_pList = 0; //不為NULL就等于0；
}
void List::DestroyList()
{
m_iLength=0;
}
void List::ClearList()
{
m_iLength = 0;
}
bool List::ListEmpty()
{
if (m_iLength == 0)
{
return true;
}
else
return false;
}
int List::ListLength()
{
return m_iLength;
}
bool List::GetElem(int i, int *e)
{
if (i<0 || i>=m_iLength)
{
return false;
}
else
{
*e = m_pList[i];
}
}
int List::LocateElem(int *e)
{
for (int i = 0; i < m_iLength; i++)
{
if (*e == m_pList[i])
return i;
}
return -1;
}
bool List::ListInsert(int i, int *e)
{
if (i<0 || i>m_iLength)
{
return false;
}
else 
{
for (int k = m_iLength - 1; k >= i; k--)
{
m_pList[k + 1] = m_pList[k];
}
m_pList[i] = *e;
m_iLength++;
}
}
bool List::ListDelete(int i, int *e)
{
if (i<0 || i>m_iLength)
{
return false;
}
else
{
for (int k = i; k < m_iLength - 1; k++)
{
m_pList[k ]=m_pList[k + 1]; //直接覆蓋了前面的元素 
}
m_iLength--;
}
}
bool List::PriorElem(int *currentElem, int *preElem)
{
/*for (int i = 0; i < m_iLength; i++)
{
if (*currentElem == m_pList[i])
*preElem = m_pList[i - 1];
}
return true;*/   //錯誤
int temp = LocateElem(currentElem);
if (temp == -1)
{
return false;
}
else
{
if (temp == 0)
{
return false;
}
else
{
*preElem = m_pList[temp - 1];
return true;
}
}
}
bool List::NextElem(int *currentElem, int *NextElem)
{
int temp = LocateElem(currentElem);
if (temp == -1)
{
return false;
}
else
{
if (temp == m_iLength)
{
return false;
}
else
{
*NextElem= m_pList[temp + 1];
return true;
}
}
}
void List::ListTraverse()
{
for (int i = 0; i < m_iLength; i++)
{
cout << m_pList[i]<<endl;
}
}

#include<iostream>
#include"LIst.h"
/*
線性表--順序表 以這個為例
3 5 7 2 9 1 8
bool InitList();   //創建線性表
void DestroyList(); //銷毀線性表
void ClearList();  //清空線性表
bool ListEmpty(); //判斷線性表是否為空
int ListLength(); //獲取線性表的長度
bool GetElem(int i,Elem *e);//獲取指定的元素
int LocateElem(Elem *e);//尋找第一個滿足e的數據元素的位序
bool PriorElem(Elem *currentElem,Elem *preElem); //獲取指定元素的前驅
bool NextElem(Elem *currentElem,Elem *NextElem);//獲取指定元素的后繼
bool ListInsert(int i,Elem *e); //在第i個插入元素
bool ListDelete(int i,Elem *e); //刪掉第i個位置的元素
void ListTraverse();  //遍歷線性表
*/
using namespace std;
int main()
{//3 5 7 2 9 1 8
int temp = 0;
int e1 = 3;
int e2 = 5;
int e3 = 7;
int e4 = 2;
int e5 = 9;
int e6 = 1;
int e7 = 8;
List *list = new List(10);
//cout << list->ListLength() << endl;
list->ListInsert(0, &e1);
//cout << list->ListLength() << endl;
list->ListInsert(1, &e2);
//cout << list->ListLength() << endl;
list->ListInsert(2, &e3);
list->ListInsert(3, &e4);
list->ListInsert(4, &e5);
list->ListInsert(5, &e6);
list->ListInsert(6, &e7);
list->ListTraverse();
/*list->GetElem(2,&temp);
cout <<"temp="<< temp << endl;
temp = 5;
cout << list->LocateElem(&temp) << endl;*/
list->PriorElem(&e4,&temp);
cout << "temp=" << temp << endl;
list->NextElem(&e4, &temp);
cout << "temp=" << temp << endl;
/*list->ListDelete(0, &temp);
if (!list->ListEmpty())
{
cout << "not empty!"<< endl;
}
else
{
cout << "empty!" << endl;
}
list->ClearList();
if (!list->ListEmpty())
{
 cout << "not empty!" << endl;
}
 else
{
 cout << "empty!" << endl;
}
cout << "#" << temp << endl;*/
//list->ListTraverse();
//cout << m_iLength << endl; //錯誤
delete list;
system("pause");
return 0;
}