C++ 类实现线性表

下图是标准C语言实现的函数定义

下面可以用C++实现，第一个参数就是this的指针

list.h函数

#pragma once
typedef  int Elem;
class List
{
public:
	List(int size);
	~List();
	void ClearList();                                   // 将数组长度设为0
	bool ListEmpty();                                   // 判断数组是否为空
	int ListLength();                                   // 获取数组长度
	bool GetElem(int i, Elem *e);                       // 查找指定下标元素
	int LocateElem(Elem *e);                            // 查找指定元素
	bool PriorElem(Elem *currentElem, Elem *preElem);   // 查找元素的前驱元素
	bool NextElem(Elem *currentElem, Elem *nextElem);   // 查找元素的后继元素
	void ListTraverse();                                // 遍历线性表，输出元素
	bool ListInsert(int i, Elem *e);                    // 在指定位置插入一个元素
	bool ListDelete(int i, Elem *e);                    // 删除指定位置元素
private:
	int *m_pList;                                       // 指向一块内存
	int m_iSize;                                        // 内存的大小
	int m_iLength;                                      // 数组的长度
};

类的实现，list.cpp

#include
#include "List.h"
using namespace std;

List::List(int size)
{
	m_iSize = size;
	m_pList = new Elem[m_iSize];
	m_iLength = 0;
}


List::~List()
{
	delete[] m_pList; // 释放数组内存
	m_pList = NULL;
}

void List::ClearList()
{
	m_iLength = 0;
}

bool List::ListEmpty()
{
	return m_iLength == 0 ? true : false;
}

int List::ListLength()
{
	return m_iLength;
}

bool List::GetElem(int i, Elem *e)
{
	if (i < 0 || i >= m_iSize)
	{
		return false;
	}
	*e = m_pList[i];
	return true;
}

int List::LocateElem(Elem *e)
{
	for (int i = 0; i < m_iLength; i++)
	{
		if (m_pList[i] == *e)
		{
			return i;
		}
	}
	return -1;
}

bool List::PriorElem(Elem *currentElem, Elem *preElem)
{
	int temp = LocateElem(currentElem);  // 查找元素的序号
	if (temp == -1)
		return false;
	else if (temp == 0)
		return false;
	else
	{
		*preElem = m_pList[temp - 1];
		return true;
	}
	
}

bool List::NextElem(Elem *currentElem, Elem *nextElem)
{
	int temp = LocateElem(currentElem);  // 查找元素的序号
	if (temp == -1)
		return false;
	else if (temp == m_iLength - 1)
		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;
	}
}

bool List::ListInsert(int i, Elem *e)
{
	if (i<0 || i>m_iLength)
		return false;
	for (int k=m_iLength-1;k>=i;k--)
	{
		m_pList[k + 1] = m_pList[k];
	}
	m_pList[i] = *e;
	m_iLength++;
	return true;
}

bool List::ListDelete(int i, Elem *e)
{
	if (i<0 || i>m_iLength)
		return false;
	*e = m_pList[i];
	for (int k = i + 1; k < m_iLength; k++)
	{
		m_pList[k - 1] = m_pList[k];
	} 
	m_iLength--;
	return true;
}

测试主程序

#include
#include "List.h"
using namespace std;

int main()
{
	Elem temp;
	Elem arry[11] = { 3,5,7,2,9,1,8 };
	List *list1 = new List(10);
	cout << "length:" << list1->ListLength() << endl;
	for (int i = 0; i < 7; i++)
	{
		list1->ListInsert(i, &arry[i]);
	}
	cout << "length:" << list1->ListLength() << endl;
	// 删除第一个元素
	list1->ListDelete(0, &temp);
	cout << temp << endl;
	// 搜索前驱元素
	list1->PriorElem(&arry[4], &temp);
	cout << temp << endl;
	list1->NextElem(&arry[4], &temp);
	cout << temp << endl;
	list1->ListTraverse();
	delete list1;
    return 0;
}