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list.cpp
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111 lines (95 loc) · 2.06 KB
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#include <stdio.h>
#include <stdlib.h>
#include "list.h"
ListNode* CreateListNode(int value)
{
ListNode* pNode = new ListNode();
pNode->m_nValue = value;
pNode->m_pNext = NULL;
return pNode;
}
void ConnectListNodes(ListNode* pCurrent, ListNode* pNext)
{
if(pCurrent == NULL)
{
printf("Error to connect two nodes.\n");
exit(1);
}
pCurrent->m_pNext = pNext;
}
void PrintListNode(ListNode* pNode)
{
if(pNode == NULL)
{
printf("The node is NULL\n");
}
else
{
printf("The key in node is %d.\n", pNode->m_nValue);
}
}
void PrintList(ListNode* pHead)
{
printf("PrintList starts.\n");
ListNode* pNode = pHead;
while(pNode != NULL)
{
printf("%d\t", pNode->m_nValue);
pNode = pNode->m_pNext;
}
printf("\nPrintList ends.\n");
}
void DestroyList(ListNode* pHead)
{
ListNode* pNode = pHead;
while(pNode != NULL)
{
pHead = pHead->m_pNext;
delete pNode;
pNode = pHead;
}
}
void AddToTail(ListNode** pHead, int value)
{
ListNode* pNew = new ListNode();
pNew->m_nValue = value;
pNew->m_pNext = NULL;
if(*pHead == NULL)
{
*pHead = pNew;
}
else
{
ListNode* pNode = *pHead;
while(pNode->m_pNext != NULL)
pNode = pNode->m_pNext;
pNode->m_pNext = pNew;
}
}
void RemoveNode(ListNode** pHead, int value)
{
if(pHead == NULL || *pHead == NULL)
return;
ListNode* pToBeDeleted = NULL;
if((*pHead)->m_nValue == value)
{
pToBeDeleted = *pHead;
*pHead = (*pHead)->m_pNext;
}
else
{
ListNode* pNode = *pHead;
while(pNode->m_pNext != NULL && pNode->m_pNext->m_nValue != value)
pNode = pNode->m_pNext;
if(pNode->m_pNext != NULL && pNode->m_pNext->m_nValue == value)
{
pToBeDeleted = pNode->m_pNext;
pNode->m_pNext = pNode->m_pNext->m_pNext;
}
}
if(pToBeDeleted != NULL)
{
delete pToBeDeleted;
pToBeDeleted = NULL;
}
}