为何无法从文件读取并显示信息

Question

#include<stdio.h>
#include <stdlib.h>
#include <string.h>
struct _PACKAGE
{
int no;//快递单号
char name[20];//收货人
char tel[20];//收货人号码
char add[40];//收货人地址
char cate[10];//运单种类
char com[10];//承运公司
char time[20];//到达时间
struct _PACKAGE *next;
};
FILE *fp;
struct _PACKAGE *p1;
void creat()
{
int a;
struct _PACKAGE *s,*head,*tail;
head=NULL;
tail=NULL;
system("cls");
if((fp=fopen("E:\程序\快递包裹管理系统作业\record.txt","w"))==NULL)
{
printf("打开文件失败");
}

do
{
s=(struct _PACKAGE  *)malloc(sizeof(struct _PACKAGE));//开辟新链表
printf("快递单号:");
scanf("%d",&s->no);
printf("\n收货人:");
scanf("%s",s->name);
printf("\n收货人号码：");
scanf("%s",s->tel);
printf("\n收货人地址：");
scanf("%s",s->add);
printf("\n运单种类：");
scanf("%s",s->cate);
printf("\n乘运公司：");
scanf("%s",s->com);
printf("\n到达时间：");
scanf("%s",s->time);
if(head==NULL) head=s;
else tail->next=s;
tail=s;
fwrite(s,sizeof(struct _PACKAGE ),1,fp);
//fprintf(fp,"%d\t%s\t%s\t\t%s\t\t%s\t%s\t%s\n",s->no,s->name,s->tel,s->add,s->cate,s->com,s->time);
printf("继续请输入任意非零数字||退出请输入0\n");
scanf("%d",&a);
system("cls");
}while(a!=0);
fclose(fp);

}
int Print()
{

system("cls");
if ((fp=fopen("E:\\程序\\快递包裹管理系统作业\\record.txt","rb"))==NULL)
{
    printf("不能打开文件，按任意键退出......\n");
    system("pause");
}

printf("单号 | 收货人 |收货人号码|收货人地址|运单种类|  承运公司   |    到达时间\n");
printf("------------------------------------------------------------------------\n");
p1=(struct _PACKAGE  *)malloc(sizeof(struct _PACKAGE));
do
{
    fread(p1,sizeof(struct  _PACKAGE),1,fp);
    if(fread(p1,sizeof(struct  _PACKAGE),1,fp)!=1)
    {
        if(feof(fp))
        {
         printf("输出结束！");
        system("pause");
         break;
        }
    }
    printf("%6s%6s%6s%10s%6s%10s%10s\n",p1->no,p1->name,p1->tel,p1->add,p1->cate,p1->com,p1->time);
}while(1);
fclose(fp);
return 0;

}
int main()
{
creat();
Print();
return 0;
}

Answer 1

#include<stdio.h>
#include <stdlib.h>
#include <string.h>
struct _PACKAGE
{
    int no;//快递单号
    char name[20];//收货人
    char tel[20];//收货人号码
    char add[40];//收货人地址
    char cate[10];//运单种类
    char com[10];//承运公司
    char time[20];//到达时间
    struct _PACKAGE* next;
};
FILE* fp;
struct _PACKAGE* p1;
void creat()
{
    int a;
    struct _PACKAGE* s, * head, * tail;
    head = NULL;
    tail = NULL;
    system("cls");
    if ((fp = fopen("record.txt", "w")) == NULL)
    {
        printf("打开文件失败");
    }

    do
    {
        s = (struct _PACKAGE*)malloc(sizeof(struct _PACKAGE));//开辟新链表
        printf("快递单号:");
        scanf("%d", &s->no);
        printf("\n收货人:");
        scanf("%s", s->name);
        printf("\n收货人号码：");
        scanf("%s", s->tel);
        printf("\n收货人地址：");
        scanf("%s", s->add);
        printf("\n运单种类：");
        scanf("%s", s->cate);
        printf("\n乘运公司：");
        scanf("%s", s->com);
        printf("\n到达时间：");
        scanf("%s", s->time);
        if (head == NULL) head = s;
        else tail->next = s;
        tail = s;
        fwrite(s, sizeof(struct _PACKAGE), 1, fp);
        //fprintf(fp,"%d\t%s\t%s\t\t%s\t\t%s\t%s\t%s\n",s->no,s->name,s->tel,s->add,s->cate,s->com,s->time);
        printf("继续请输入任意非零数字||退出请输入0\n");
        scanf("%d", &a);
        system("cls");
    } while (a != 0);
    fclose(fp);
}
int Print()
{
    system("cls");
    if ((fp = fopen("record.txt", "rb")) == NULL)
    {
        printf("不能打开文件，按任意键退出......\n");
        system("pause");
    }

    printf("单号 | 收货人 |收货人号码|收货人地址|运单种类|  承运公司   |    到达时间\n");
    printf("------------------------------------------------------------------------\n");
    p1 = (struct _PACKAGE*)malloc(sizeof(struct _PACKAGE));
    do
    {
        //fread(p1, sizeof(struct  _PACKAGE), 1, fp);
        if (fread(p1, sizeof(struct  _PACKAGE), 1, fp) != 1)
        {
            if (feof(fp))
            {
                printf("输出结束！");
                system("pause");
                break;
            }
        }
        printf("%6d%6s%6s%10s%6s%10s%10s\n", p1->no, p1->name, p1->tel, p1->add, p1->cate, p1->com, p1->time);
    } while (1);
    fclose(fp);
    return 0;
}
int main()
{
    creat();
    Print();
    return 0;
}