为什么C语言在输入数据后多输出了一个数字才会输出结果
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
typedef int ElemType;
typedef struct LNode
{
ElemType data;
struct LNode * next;
}LNode,*pLinkList;
typedef LNode * PNode;
//创建带有头结点的空链表
pLinkList SetNullList_Link()
{
pLinkList head = (pLinkList)malloc(sizeof(LNode)); //申请头结点空间
if (head != NULL)
head->next = NULL;
else
printf("申请头节点空间失败！\n");
return head; //返回头指针
}
int IsNull_Link(pLinkList head) //判断链表是否为空,空返回1，非空返回0
{
return(head->next == NULL);
}
//1）初始化有序单链表L。
void CreatList(LNode*& L, int arry[], int length)
{
L = (LNode*)malloc(sizeof(LNode));
LNode* p, * pre, * s;
s = L;
for (int i = 0; i < 2; i++)
{
p = (LNode*)malloc(sizeof(LNode));
p->data = arry[i];
s->next = p;
s = p;
}
L->next->next = NULL;
for (int i = 1; i < length; i++)
{
p = (LNode*)malloc(sizeof(LNode));
p->data = arry[i];
pre = L;
while (pre->next != NULL && pre->next->data < p->data){
pre = pre->next;
}
p->next = pre->next;
pre->next = p;
}
}
void printList(pLinkList list)
{
PNode temp = list->next;
int i = 0;
while (temp)
{
printf("%d ", temp->data);
temp = temp->next;
}
printf("\n");
}
int main()
{
int Index;
pLinkList L= NULL;
L = SetNullList_Link();
int num,arr[50];
printf("输入初始化链表的元素个数：");
scanf("%d",&num);
printf("请输入数据（用空格分开）：");
for(int i=0;i<num;i++){
scanf("%d ",&arr[i]);
}
CreatList(L,arr,num);
printList(L);
return 0;
}
