链表的存储与读取问题

#include<stdio.h>
#include<string.h>
#include<process.h>
#include<malloc.h>

struct bank
{
long account;
char name[20];
char password[10];
float saving;
struct bank *pNext;
};

struct bank *pHead,*pEnd;

struct bank *temp;


void create();
void read(struct bank *tempHead);
void list(struct bank *temp);

void write(struct bank *tempBank);

void main()
{
int choose;
if((pHead=(struct bank*)malloc(sizeof(struct bank)))==NULL)
{
printf("创建链表失败！");
exit(1);
}

if((temp=(struct bank*)malloc(sizeof(struct bank)))==NULL)
{
printf("创建临时链表失败！");
exit(1);
}

pHead=pEnd=NULL;

while(1)
{
printf("\n\n请输入选择：");
scanf("%d",&choose);
if(choose==1)
{
create();
temp=pHead;
write(temp);
continue;
}
if(choose==2)
{
read(temp);
list(pHead);
continue;
}
if(choose==3)
exit(0);
}
}

void write(struct bank *tempBank)
{
FILE *fp;
if((fp=fopen("bank.obj","ab+"))==NULL)
{
printf("数据文件创建失败！");
exit(1);
}

while(1)
{
if(tempBank->pNext==NULL)
{
fwrite(tempBank,sizeof(struct bank),1,fp);
if(ferror(fp))
{
printf("数据写入失败！");
exit(1);
}
fclose(fp);
return;
}
tempBank=tempBank->pNext;
}
}

void create()
{
float F_F_F_F=0.0; //无意义定义，只是为了提醒VC6.0需要处理浮点数
struct bank *pCurrentBank;


if((pCurrentBank=(struct bank*)malloc(sizeof(struct bank)))==NULL)
{
printf("创建链表失败！");
exit(1);
}
printf("\n\n*******************");
printf("\n 数据录入开始！");
printf("\n\n帐号：　");
scanf("%d",&pCurrentBank->account);
printf("\n姓名：　");
scanf("%s",&pCurrentBank->name);
printf("\n密码：　");
scanf("%s",&pCurrentBank->password);
printf("\n存款：　");
scanf("%f",&pCurrentBank->saving);

if(pHead==NULL)
pHead=pCurrentBank;
else
pEnd->pNext=pCurrentBank;

pEnd=pCurrentBank;
pEnd->pNext=NULL;
}

void list(struct bank *tempHead)
{
if(tempHead==NULL)
{
printf("暂无数据！\n\n");
return;
}
while(tempHead)
{
printf("帐号：%d\t\t姓名：%s\t\t存款：%0.2f\n\n",\
tempHead->account,tempHead->name,tempHead->saving);
tempHead=tempHead->pNext;
}
}

void read(struct bank * tempHead)
{
FILE *fp;
if((fp=fopen("bank.obj","rb"))==NULL)
{
printf("数据文件打开失败！");
exit(1);
}

while(!feof(fp))
{
fread(tempHead,sizeof(struct bank),1,fp);
if(pHead==NULL)
pHead=tempHead;
else
pEnd->pNext=tempHead;
pEnd=tempHead;
pEnd->pNext=NULL;

}
fclose(fp);
return;
}


在这个程序中，如果注释掉文件存储和读取的代码，链表的输入和显示功能都已正常。
但是，写入链表后，无法正常读取，读取的链表居然只有最后输入的一个节点数据。
而如果在read()函数中的fread()指令后面跟一条printf()指令来显示数据，则全部数据都会显示出来，只是最后一个数据会重复显示一次。
初学C，请各位大哥大姐帮忙！