共谋节点两个单列表

/*
求链表公共结点
*/
#include<stdio.h>
#include<stdlib.h>
typedef struct _NODE_
{
	int data;
	struct _NODE_ *next;
}Node,*pNode;
int get_length(pNode list)
{
	if(list == NULL)
	{
		return 0;
	}
	int len = 0;
	pNode pTemp = list;
	while(pTemp != NULL)
	{
		len++;
		pTemp = pTemp->next;
	}
	return len;
}
void create(pNode *list,int n)
{
	if(n <= 0)
	{
		return;
	}
	*list = (pNode)malloc(sizeof(Node));
	if(!list)
	{
		exit(-1);
	}
	int data;
	scanf("%d",&data);
	(*list)->data = data;
	(*list)->next = NULL;
	pNode pTemp = *list;
	for(int i = 0; i < n-1; i++)
	{
		scanf("%d",&data);
		pNode pNew = (pNode)malloc(sizeof(Node));
		if(!pNew)
		{
			exit(-1);
		}
		pNew->data = data;
		pNew->next = NULL;
		pTemp->next = pNew;
		pTemp = pNew;
	}
}
//求单链表公共结点
pNode FindCommonNode(pNode list1,pNode list2)
{
	if(list1 == NULL || list2 == NULL)
	{
		return NULL;
	}
	int len1 = get_length(list1);
	int len2 = get_length(list2);
	
	int dif = len1 - len2;
	pNode pLong = list1;
	pNode pShort = list2;
	if(dif < 0)
	{
		pLong = list2;
		pShort = list1;
		dif = len2-len1;
	}
	while(dif > 0)
	{
		pLong = pLong->next;
		dif--;
	}
	while(pLong != NULL && pShort != NULL && pLong != pShort)
	{
		pLong = pLong->next;
		pShort = pShort->next;
	}
	return pLong;
}
void Destroy(pNode *list)
{
	if(*list == NULL)
	{
		return;
	}
	pNode p = *list,q;
	while(p != NULL)
	{
		q = p->next;
		free(p);
		p = q;
	}
}