c语言 feof 死循环 请教：为什么我用while(!feof(fp))时会出现无限循环？？？？

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#include

#include

#include

#define LEN sizeof(struct bookl)

struct bookl

{

long num;

char name[20];

float price;

char people[20];

char prass[20];

int yes;

struct bookl *next;

};

void main() /*图书查询*/

{

struct bookl *bookment;

bookment=(struct bookl *)malloc(LEN);

char name[20];

int i;

FILE *fp;

printf("请输入书名：\n");

scanf("%s",name);

printf("\n");

fp=fopen("E:\\课程设计\\met.txt","r");

if(fp==NULL)

{

printf("error\n");

return ;

}

else

{

while(!feof(fp))

{

printf("编号 书名 价格 出版社 借阅人 是否借出 \n ");

fread(&bookment->num,sizeof(int),1,fp);

fread(bookment->name,20,1,fp);

fread(bookment->prass,20,1,fp);

fread(bookment->people,20,1,fp);

fread(&bookment->price,sizeof(float),1,fp);

fread(&bookment->yes,sizeof(int),1,fp);

if(strcmp(bookment->name,name)==0)

{

printf("%-6ld%8s",bookment->num,bookment->name);

printf("%8f%8s",bookment->price,bookment->prass);

printf("%8s%6d",bookment->people,bookment->yes);

}

else

printf("查无此书，请重新选择!\n");

fclose(fp);

}

}