C语言单链表输出数据

Question

问题遇到的现象和发生背景

C语言单链表输出数据把头指针也输出来了？

问题相关代码，请勿粘贴截图

#include<stdio.h>
#include<stdlib.h>
#include<malloc.h>
typedef int ElemType;
#include"SingleLinklist.h"
int Insert(int num,SingleLinklist *head,int length)
{
    int j=-1;
    SingleLinklist *p;
    p=head;
    while(p->next!=NULL&&j<length)
    {
        if(num>=p->data)
        {
            p=p->next;j++;
        }
        else
            {
                ListInsert(p,j,num);    
            }
    }
}
int main()
{
    SingleLinklist *head;
    int i=0,length=0;
    int num;
    ListInitialize(&head);
    do
    {
        scanf("%d",&num);
        ListInsert(head,i,num);
        length++;
        i++;
    }while(getchar()==' ');
    printf("当前表的数据有如下：\n");
    putlist(head);

以下为自定义的头文件：

#include<malloc.h>
#include<stdio.h>
#include<stdlib.h> 
typedef struct SingleNode{
    ElemType data;
    struct SingleNode *next;
}SingleLinklist,*Linklist;
void ListInitialize(SingleLinklist * *head)
{
    if((*head=(SingleLinklist *) malloc(sizeof(SingleLinklist)))==NULL)
    {
        printf("建表失败！");
        exit(1);
    }
    (*head)->next=NULL;
}
int ListLength(SingleLinklist *head)
{
    SingleLinklist *p=head;
    int size =0;
    while(p->next!=NULL)
    {
        p=p->next;
        size ++;
    }
    return size;
}
int ListGet(SingleLinklist *head,int i,ElemType *x)
{
    SingleLinklist *p;
    int j;
    p=head;
    j=-1;
    while(p->next!=NULL&&j<i)
    {
        p=p->next;
        j++;
    }
    if(j!=i)
    {
        printf("取元素位置出错");
        return 0;
    }
    *x=p->data;
    return 1;
}
int ListInsert(SingleLinklist *head,int i,ElemType x)
{
    SingleLinklist  *p,*q;
    int j;
    p=head;
    j=-1;
    while(p->next!=NULL&&j<i-1)
    {
        p=p->next;
        j++;
    }
    if(j!=i-1)
    {
        printf("插入位置出错！");
        return 0; 
    }
    if((q=(SingleLinklist *) malloc (sizeof(SingleLinklist)))==NULL)
    {
        exit(1);
    }
    q->data=x;
    q->next=p->next;
    p->next=q;
    return 1;
}
int ListDelete(SingleLinklist *head,int i,ElemType *x)
{
    SingleLinklist *p,*s;
    int j;
    p=head;
    j=-1;
    while(p->next!=NULL&&p->next!=NULL&&j<i-1)
    {
        p=p->next;
        j++;
    }
    if(j!=i-1)
    {
        printf("删除位置出错！");
        return 0;
    }
    s=p->next;
    *x=s->data;
    p->next=s->next;
    free(s);
    return 1;
}
void Destroy(SingleLinklist **head)
{
    SingleLinklist *p,*p1;
    p=*head;
    while(p!=NULL)
    {
        p1=p;
        p=p->next;
        free(p1);
        
    }
    *head=NULL;
}
void putlist(SingleLinklist *head)
{
    SingleLinklist *p;
    p=head;
    while(p!=NULL)
    {
        printf("%5d",p->data);
        p=p->next;
    }
}

运行结果及报错内容

Answer 1

p的指向错了