#define?S?10
#define?L?20
#define?N?30
#include“stdio.h“
#include“string.h“
#include“stdlib.h“
#include“iostream.h“
struct?UFD{
???????char?fname[20];
???????char?shuxing[20];
???????int??length;
???????int??addr;
????};
struct?UOF{
???????char?fname[20];
???????char?shuxing[10];
???????int??length;
???????char?state[10];
???????int??*w*r;
???????};
struct?MFD{
???????char?uname[25];
???????struct?UFD?ufd[L];
???????struct?UOF?uof[S];
???????};
struct?MFD?mfd[N];

create（int?x）;
open（int?x）;
close（int?x）;
Read（int?x）;
write（int?x）;
ddelete（int?x）;
/*-----------zhu?han?shu----------------------------*/

main（）
{
?char?namestr[20]order[20];
?int?ij;
?/*chu?shi?hua?MFD*/
?/************************************************************/
?strcpy（mfd[0].uname“lanxueqin“）;
?strcpy（mfd[0].ufd[0].fname“wenjian1“）;
?strcpy（mfd[0].ufd[0].shuxing“read“）;
?mfd[0].ufd[0].length=25;
?mfd[0].ufd[0].addr=6120;
/*?printf（“uname:%sfname:%sshuxing:%slength:%daddress:%d\n“mfd[0].unamemfd[0].ufd[0].fnamemfd[0].ufd[0].shuxingmfd[0].ufd[0].lengthmfd[0].ufd[0].addr）;*/
?strcpy（mfd[0].ufd[1].fname“wenjian2“）;
?strcpy（mfd[0].ufd[1].shuxing“rw“）;
?mfd[0].ufd[1].length=20;
?mfd[0].ufd[1].addr=0;

?strcpy（mfd[0].ufd[2].fname“wenjian3“）;
?strcpy（mfd[0].ufd[2].shuxing“rw“）;
?mfd[0].ufd[2].length=20;
?mfd[0].ufd[2].addr=1000;

?strcpy（mfd[1].uname“hey“）;
?strcpy（mfd[1].ufd[0].fname“wenjian5“）;
?strcpy（mfd[1].ufd[0].shuxing“read“）;
?mfd[1].ufd[0].length=30;
?mfd[1].ufd[0].addr=4020;
?strcpy（mfd[1].ufd[1].fname“wenjian8“）;
?strcpy（mfd[1].ufd[1].shuxing“rw“）;
?mfd[1].ufd[1].length=21;
?mfd[1].ufd[1].addr=1;
?/*****************************************************/


?/*chu?shi?hua?UOF*/
?/********************************************************/
?strcpy（mfd[0].uof[0].fname“wenjian1“）;
?strcpy（mfd[0].uof[0].shuxingmfd[0].ufd[0].shuxing）;
?mfd[0].uof[0].length=mfd[0].ufd[0].length;
?strcpy（mfd[0].uof[0].state“open“）;
?mfd[0].uof[0].w=mfd[0].ufd[0].addr;
?mfd[0].uof[0].r=mfd[0].ufd[0].addr;

?strcpy（mfd[0].uof[1].fname“wenjian3“）;
?strcpy（mfd[0].uof[1].shuxingmfd[0].ufd[2].shuxing）;
?mfd[0].uof[1].length=mfd[0].ufd[2].length;
?strcpy（mfd[0].uof[1].state“open“）;
?mfd[0].uof[1].w=mfd[0].ufd[2].addr;
?mfd[0].uof[1].r=mfd[0].ufd[2].addr;
??/*?printf（“w=%d“mfd[0].uof[0].w）;?*/
?/*******************************************************/
shuru:
printf（“Initial?has?finished.Please?input?your?name?to?login:\n“）;
scanf（“%s“namestr）;
for（i=0;i?{if（!strcmp（namestrmfd[i].uname））?/*xiang?deng*/
		break;
?}/*for*/
??if（i>=N）
??{
??????printf（“The?name?you?have?inputed?is?wrong!\n“）;
??????goto?shuru;
??}
instructions:
printf（“Welcome!Input?your?instruction:\n“）;
printf（“create---------create?a?file\n“）;
printf（“open??---------open???a?file\n“）;
printf（“close?---------close??a?file\n“）;
printf（“read??---------read???a?file\n“）;
printf（“write?---------write??a?fi