#include?“stdio.h“
#include?“string.h“
#include?“conio.h“
#include?“stdlib.h“
#include?

#define?MAXNAME?25??????????????????/*the?largest?length?of?mfdnameufdnamefilename*/
#define?MAXCHILD?50?????????????????/*the?largest?child每個用戶名下最多有50個文件*/
#define?MAX?（MAXCHILD*MAXCHILD）?????/*the?size?of?fpaddrno*/

typedef?struct?????????????????????/*the?structure?of?OSFILE定義主文件*/
{
	int??fpaddr;???????????????????/*file?physical?address*/
????int??flength;??????????????????/*file?length*/
????int??fmode;					???/*file?mode:0-Read?Only;1-Write?Only;2-Read?and?Write;?3-Protect;*/
????char?fname[MAXNAME];???????????/*file?name*/
}?MainFile;

typedef?struct?????????????????????/*the?structure?of?UserDir定義用戶文件目錄*/
{
	char?ufdname[MAXNAME];?????????/*用戶文件目錄?name*/
	MainFile?ufdfile[MAXCHILD];????/*用戶文件目錄?own?file*/
}UserDir;

typedef?struct????????????????????/*the?structure?of?OSUFD‘LOGIN定義用戶結構體*/
{
	char?ufdname[MAXNAME];????????/*ufd?name*/
????char?ufdpword[8];?????????????/*ufd?password*/
}?User;

typedef?struct?????/*file?open?mode定義操作方式*/
{
	int?ifopen;?????/*ifopen:0-close1-open*/
????int?openmode;???/*0-read?only1-write?only2-read?and?write3-protect*/
}OPENMODE;

void?LoginSystem（）;	???????????????/*LOGIN?FileSystem*/
void?DirFile（）;	???????????????????/*Dir?FileSystem*/
void?Create（）;?????????????????????/*Create?File*/
void?Delete（）;?????????????????????/*Delete?File*/
void?ModifyFileMode（）;?????????????/*Modify?FileMode*/
void?OpenFile（）;	???????????????/*Open?File*/
void?CloseFile（）;??????????????????/*Close?File*/
void?ReadFile（）;	???????????????/*Read?File*/
void?WriteFile（）;??????????????????/*Write?File*/
void?QuitSystem（）;	???????????????/*Quit?FileSystem*/
void?ChangeUser（）;		???????????/*Change?Dir*/
void?SaveFile（）;???????????????????/*save?user?file*/
void?DeleteUser（）;?????????????????/*save?user*/
void?FirstUse（）;???????????????????/*The?fist?time?use?system*/
void?Clean（）;??????????????????????/*clean?the?screen*/
void?Loading（）;????????????????????/*loading?user?and?file*/
int??CreateUser（char*）;????????????/*create?new?user*/
void?Help（）;

char?*RemoveTailBlank（char?*str）;??/*remove?the?trailing?blanks.*/
char?*RemoveHeadBlank（char?*str）;??/*remove?the?heading?blanks.*/
void?InputPW（char?*password）;??????/*input?passworduse?‘*‘?replace*/
int?ExistUser（char?*dirname）;??????/*Whether?DirName?ExistExist-iNot?Exist-0*/
int?WriteFile1（）;??????????????????/*write?file*/
int?ExistFile（char?*filename）;?????/*Whether?FileName?ExistExist-iNot?Exist-0*/
void?SetPANo（int?RorW）;????????????/*Set?physical?address?num*/
int?FindPANo（）;????????????????????/*find?out?physical?address?num*/

int?UserNum=0;?????????????????????/*the?count?of?mfd‘s?ufds用戶數*/
int?FileNum[MAXCHILD];?????????????/*the?count?of?ufd‘s?files子文件數*/
int?loginsuc=0;????????????????????/*whether?login?successfully登陸成功*/
char?username[MAXNAME];????????????/*record?login?user‘s?name?原始登錄用戶名*/