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1.注意临时指针还是用来保存指针值，不要用来指结点

#include 
   
    #include 
    
     typedef struct LNode{	int data;	struct LNode* next;}LNode,*LinkList;LinkList CreateList(){	LinkList L;	L = (LinkList)malloc(sizeof(LNode));	L->next = NULL;	LNode *q = L;	LNode *p;	int x;	scanf("%d",&x);	while(x != 999)	{		p = (struct LNode *)malloc(sizeof(LNode));		p->data = x;		p->next = NULL;		q->next = p;		q = p;		scanf("%d",&x);	}	return L;}void main(){	LinkList a = (LinkList)malloc(sizeof(LNode));    LinkList b = (LinkList)malloc(sizeof(LNode));	a = CreateList();	b = CreateList();	LinkList c = (LinkList)malloc(sizeof(LNode));	c->next = NULL;	LNode *p = a->next;	LNode *q = b->next;	LNode *y;	while(p != NULL && q != NULL)	{		if(p->data <= q->data)		{			y = p->next;			p->next = c->next;			c->next = p;			p = y;		}		if(p->data > q->data)		{			y = q->next;			q->next = c->next;			c->next = q;			q = y;		}	}	//ex	if(q)		p = q;	while(p != NULL)	{		y = p->next;		p->next = c->next;		c->next = p;		p = y;	}	y = c->next;	while(y != NULL)	{		printf("%d ",y->data);		y = y->next;	}}
    
   

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