文件系统模拟设计c++

#include "stdio.h"

#include "iostream.h"

#include "string.h"

#include "iomanip.h"

#define FILENAME_LENGTH 10 //文件名称长度

#define COMMAND_LENGTH 10 //命令行长度

#define PARA_LENGTH 30 //参数长度

//账号结构

typedef struct users

{

char name[8];

char pwd[10];

}users;

//文件结构

struct fnode

{

char filename[FILENAME_LENGTH];

int isdir;

int isopen;

char content[255]; //我是目录/我是文件

fnode *parent;

fnode *child;

fnode *prev;

fnode *next;

};

//账号

users usrarray[8] =

{

"usr1","usr1",

"usr2","usr2",

"usr3","usr3",

"usr4","usr4",

"usr5","usr5",

"usr6","usr6",

"usr7","usr7",

"usr8","usr8",

};

fnode *initfile(char filename[],int isdir); void createroot();

int run();

int findpara(char *topara);

bool chklogin(char *users, char *pwd);

void help();

int mkdir();

int create();

int read();

int write();

int del();

int cd();

int dir();

fnode *root,*recent,*temp,*ttemp;

char

para[PARA_LENGTH],command[COMMAND_LENGTH],temppara[PARA_LENGTH],recentpara[PARA _LENGTH];

//创建文件与目录结点

fnode* initfile(char filename[],int isdir)

{

fnode *node=new fnode;

strcpy(node->filename,filename);

node->isdir=isdir;

node->isopen=0;

node->parent=NULL;

node->child=NULL;

node->prev=NULL;

node->next=NULL;

return node;

}

//创建文件存储结点

void createroot ()

{

recent=root=initfile("/",1);

root->parent=NULL;

root->child=NULL;

root->prev=root->next=NULL;

strcpy(para,"/");

}

int mkdir()

{

temp=initfile(" ",1);

cin>>temp->filename;

if(recent->child==NULL)

{

temp->parent=recent;

temp->child=NULL;

recent->child=temp;

temp->prev=temp->next=NULL;

}

else

{

ttemp=recent->child;

while(ttemp->next)

{

ttemp=ttemp->next;

if(strcmp(ttemp->filename,temp->filename)==0&&ttemp->isdir==1) {

printf("对不起,目录已存在!");

return 1;

}

}

ttemp->next=temp;

temp->parent=NULL;

temp->child=NULL;

temp->prev=ttemp;

temp->next=NULL;

}

return 1;

}

int create()

{

temp=initfile(" ",0);

cin>>temp->filename;

cin>>temp->content;

if(recent->child==NULL)

{

temp->parent=recent;

temp->child=NULL;

recent->child=temp;

temp->prev=temp->next=NULL;

cout<<"文件建立成功!"<

}

else

{

ttemp=recent->child;