c语言空文件里面有什么,新人求助，关于读取空文件的问题。

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#include

#include

#include

#include

struct ques{

int num;

char qu[80];

char *op[4];

char an[10];

struct ques *next;

};

int main(void)

{

struct ques *h,*tail,*p;

FILE *fp;

int n,size=sizeof(struct ques);

char q[80],oa[80],ob[80],oc[80],od[80],a[10];

h=tail=NULL;

if((fp=fopen("F:\a.txt","r"))==NULL){

printf("file open errorn");

printf("press any key to exitn");

getch();

exit(1);

}

while(!feof(fp)){

fscanf(fp,"%d",&n);

fscanf(fp,"%s",q);

fscanf(fp,"%s",oa);

fscanf(fp,"%s",ob);

fscanf(fp,"%s",oc);

fscanf(fp,"%s",od);

fscanf(fp,"%s",a);

p=(struct ques*)malloc(size);

p->num=n;

strcpy(p->qu,q);

p->op[0]=oa;

p->op[1]=ob;

p->op[2]=oc;

p->op[3]=od;

strcpy(p->an,a);

p->next=NULL;

if(h==NULL)

h=p;

else

tail->next=p;

tail=p;

printf("%d",&p->num);

}

if(fclose(fp)){

printf("can not close the filen");

printf("press any key to exitn");

getch();

exit(0);

}

return 0;

}