谁能给我一个400行左右的程序，什么的都可以 30

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#热议# 上班途中天气原因受伤算工伤吗？

西班同学
2006-06-20 · TA获得超过165个赞

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<a name="34385691"><div class="f14">留言本，
<br>新闻
<br>
<br>400行都能实现，
<br>很多程序都行了， </div>

<div align="right" class="gray">回答者：<a href="http://passport.baidu.com/?detail&aid=7&default_tab=2&un=bobotli" target=_blank>bobotli</a> - <a href="http://www.baidu.com/search/zhidao_help.html#n5"  target=_blank>魔法师 五级</a>   6-20 09:19</div>

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#define BlockSize 16
#define BlockNum 1000
#define MaxBlockNumForFile 16
#define MaxFileLength ((BlockSize)*(MaxBlockNumForFile))
#define MaxUserNum 8
#define MaxFileNumForUser 16
#define MaxOpenFileNum 4
#include<stdio.h>
#include<string.h>
/*struct define*/
typedef struct
{
char UserName[16];
char UserPwd[16];
int UserGroup;
int FlagInUse;
}UserInfo;

typedef struct
{
char text[BlockSize];
}BlockStruct;

typedef struct
{
char FileName[16];
int FileAttrib;
int FileLength;
int FileBlock[MaxBlockNumForFile];
int FlagInUse;
}FileCtrlBlock;

typedef struct
{
FileCtrlBlock FCB[MaxFileNumForUser];
}UserFileDir;

typedef struct
{
char UserName[16];
int UFDAddr;
}MainFileDir;

typedef struct
{
char FileName[16];
int FileAttrib;
int FileLength;
int FileState; /*0:create,1:open*/
int ReadPointer;
int WritePointer;
int FlagInUse;
}UserOpenFile;
/*initialize*/
UserInfo USER[MaxUserNum];
MainFileDir MFD[MaxUserNum];
UserFileDir UFD[MaxUserNum];
BlockStruct BLOCK[BlockNum];
int BlockIsUse[BlockNum];
UserOpenFile UOF[MaxUserNum][MaxOpenFileNum];
char ActiveUser[16];
char Domain[16]={"localhost"};
char Directory[16];
int mfdindex,ufdindex,fileindex;
/*function define*/
void cls(void)
{
int i;
for (i=0;i<24 ;i++ )
{
printf("\n");
}
}
int AddUser(char uname[16],char upwd[16],int ugroup)
{
int i;
for (i=0;i<MaxUserNum;i++)
{
if (USER[i].FlagInUse&&!strcmp(USER[i].UserName,uname))
{
printf("User %s has already exist.",uname);
return -1;
}
}
for (i=0;i<MaxUserNum ;i++ )
{
if (USER[i].FlagInUse)
{
continue;
}
strcpy(USER[i].UserName,uname);
strcpy(USER[i].UserPwd,upwd);
USER[i].UserGroup=ugroup;
USER[i].FlagInUse=1;
strcpy(MFD[i].UserName,uname);
MFD[i].UFDAddr=i;
return 0;
}
printf("\nUsers\' number has reached the max value.");
return -1;
}
int DelUser(char uname[16])
{
int i,j;
if (!strcmp(uname,USER[0].UserName))
{
printf("\nuser \'%s\' must in the system.",USER[0].UserName);
return -1;
}
if (!strcmp(uname,ActiveUser))
{
printf("\nYou can not delete yourself.");
return -1;
}
for (i=0;i<MaxUserNum;i++)
{
if (USER[i].FlagInUse&&!(strcmp(USER[i].UserName,uname)))
{
for (j=0;j<MaxFileNumForUser;j++)
{
if (UFD[ufdindex].FCB[j].FlagInUse)
{
printf("User has file in the system.");
return -1;
}
}
USER[i].FlagInUse=0;
return 0;
}
}
printf("user \'%s\' not exist.",uname);
return -1;
}
void shell(void)
{
char sign='#';
if (strcmp(ActiveUser,"root"))
{
sign='$';
}
printf("\n[%s@%s %s]%c ",ActiveUser,Domain,ActiveUser,sign);
}
int Login(char uname[16],char upwd[16])
{
int i;
for (i=0;i<MaxUserNum;i++)
{
if (!USER[i].FlagInUse||strcmp(USER[i].UserName,uname))
{
continue;
}
else if (strcmp(USER[i].UserPwd,upwd))
{
printf("Password incorrect.");
return -1;
}
else
return 0;
}
printf("User %s not exist.",uname);
return -1;
}
int Login_fun(void)
{
char uname[16],upwd[16];
int i=0,key=0;
fflush(stdin);
printf("login:");
scanf("%s",uname);
printf("Password:");
while (key!=13&&i<15)
{
if (kbhit())
{
key=getch();
upwd[i++]=key;
}
}
upwd[i-1]='\0';
if (!Login(uname,upwd))
{
strcpy(ActiveUser,uname);
strcpy(Directory,uname);
for (i=0;i<MaxFileNumForUser;i++)
{
if (USER[i].FlagInUse&&!strcmp(MFD[i].UserName,ActiveUser))
{
mfdindex=i; break;
}
}
ufdindex=MFD[mfdindex].UFDAddr;
return 0;
}
else{
printf("Login incorrect.\n");
if (Login_fun())
return -1;
else
return 0;
}
}
int GeneralInitialize(void)
{

printf("\n%s ",Domain);
AddUser("root","root",1);
return 0;
}
int SeekFreeBlock(void)
{
static int i=0;
int j;
for (;i<BlockNum;i++)
{
if (!BlockIsUse[i])
{
BlockIsUse[i]=1;
return i;
}
}
for (j=0;j<BlockNum;j++)
{
if (!BlockIsUse[j])
{
BlockIsUse[j]=1;
return j;
}
}
return -1;
}
int Create(char fname[16],int flength,int fattrib)
{
int i,j=0,k,flag,uofindex,alocblock[MaxBlockNumForFile];
if (flength>=MaxFileLength)
{
printf("File Length too long.");
return -1;
}
if (fattrib!=0&&fattrib!=1)
{
printf("File Attribute Error.");
return -1;
}
for (i=0;i<MaxFileNumForUser;i++)
{
if (UFD[ufdindex].FCB[i].FlagInUse&&!strcmp(UFD[ufdindex].FCB[i].FileName,fname))
{
printf("Filename has already been used.");
return -1;
}
}
for (i=0;i<MaxOpenFileNum;i++)
{
if (!UOF[mfdindex][i].FlagInUse)
{
break;
}
}
if (i==MaxOpenFileNum)
{
printf("Can not open more files.");
return -1;
}
uofindex=i;
for (i=0;i<MaxFileNumForUser;i++)
{
if (!UFD[ufdindex].FCB[i].FlagInUse)
{
break;
}
}
if (i==MaxFileNumForUser)
{
printf("Can not create more files.");
return -1;
}
fileindex=i;
k=flength;
do
{
if (-1==(i=SeekFreeBlock()))
{
printf("Not enough free space.");
return -1;
}
alocblock[j++]=i;
k-=BlockSize;
} while(k>0);
for (i=0;i<MaxBlockNumForFile;i++)
{
if (i<j)
{
UFD[ufdindex].FCB[fileindex].FileBlock[i]=alocblock[i];
}
else
{
UFD[ufdindex].FCB[fileindex].FileBlock[i]=-1;
}
}
UOF[mfdindex][uofindex].ReadPointer=0;
UOF[mfdindex][uofindex].WritePointer=0;
strcpy(UFD[ufdindex].FCB[fileindex].FileName,fname);
UFD[ufdindex].FCB[fileindex].FileAttrib=fattrib;
UFD[ufdindex].FCB[fileindex].FileLength=flength;
UFD[ufdindex].FCB[fileindex].FlagInUse=1;
strcpy(UOF[mfdindex][uofindex].FileName,fname);
UOF[mfdindex][uofindex].FileAttrib=fattrib;
UOF[mfdindex][uofindex].FileLength=flength;
UOF[mfdindex][uofindex].FileState=0;
UOF[mfdindex][uofindex].FlagInUse=1;
return 0;
}
int Open(char fname[16],int opreate)
{
int i,flag=0;
for (i=0;i<MaxFileNumForUser;i++)
{
if (UFD[ufdindex].FCB[i].FlagInUse&&!strcmp(UFD[ufdindex].FCB[i].FileName,fname))
{
fileindex=i;
flag=1; break;
}
}
if (!flag)
{
printf("File %s not exist.",fname);
return -1;
}
flag=0;
for (i=0;i<MaxOpenFileNum;i++)
{
if (UOF[mfdindex][i].FlagInUse&&!strcmp(UOF[mfdindex][i].FileName,fname))
{
flag=1; break;
}
}
if (flag)
{
if (UOF[mfdindex][i].FileState==0)
{
printf("File under creating.");
}
else
{
printf("File has already been opened.");
}
return -1;
}
else
{
if (UFD[ufdindex].FCB[fileindex].FileAttrib<opreate)
{
printf("File is ReadOnly.");
return -1;
}
for (i=0;i<MaxOpenFileNum;i++)
{
if (UOF[mfdindex][i].FlagInUse==0)
{
break;
}
}
if (i==MaxOpenFileNum)
{
printf("Can not open more files.");
return -1;
}
strcpy(UOF[mfdindex][i].FileName,UFD[ufdindex].FCB[fileindex].FileName);
UOF[mfdindex][i].FileAttrib=opreate;
UOF[mfdindex][i].FileLength=UFD[ufdindex].FCB[fileindex].FileLength;
UOF[mfdindex][i].FileState=1;
UOF[mfdindex][i].FlagInUse=1;
UOF[mfdindex][i].ReadPointer=0;
UOF[mfdindex][i].WritePointer=0;
return 0;
}
}
int Write(char fname[16],int wrpoint)
{
int i,j,k,wrlong,b,e;
char str[MaxFileLength];
for (i=0;i<MaxOpenFileNum;i++)
{
if (UOF[mfdindex][i].FlagInUse&&!strcmp(UOF[mfdindex][i].FileName,fname))
{
break;
}
}
if (MaxOpenFileNum==i)
{
printf("File was not been created nor opened.");
return -1;
}
fileindex=i;
if (UOF[mfdindex][fileindex].FileState&&!UOF[mfdindex][fileindex].FileAttrib)
{
printf("The file is ReadOnly.");
return -1;
}
if (-1==wrpoint)
{
wrpoint=UOF[mfdindex][fileindex].WritePointer;
}
gets(str);
wrlong=strlen(str);
if (wrlong+wrpoint>=UOF[mfdindex][fileindex].FileLength)
{
printf("Write too long.");
return -1;
}
i=0;k=0;
for (i=wrpoint/BlockSize;i<(wrlong+wrpoint)/BlockSize+1;i++)
{
b=(wrpoint<i*BlockSize)?0:wrpoint%BlockSize;
e=((i+1)*BlockSize-1<wrlong+wrpoint)?(BlockSize-1):(wrlong+wrpoint)%BlockSize;
for (j=b;j<=e;j++)
{
BLOCK[UFD[ufdindex].FCB[fileindex].FileBlock[i]].text[j]=str[k++];
}
}
BLOCK[UFD[ufdindex].FCB[fileindex].FileBlock[i]].text[k]='\0';
UOF[mfdindex][fileindex].WritePointer=wrlong+wrpoint;
return 0;
}
int Read(char fname[16],int rlength)
{
int i,j,k,b,e,reachpoint;
char tmpBlock[BlockSize+1];
for (i=0;i<MaxOpenFileNum;i++)
{
if (UOF[mfdindex][i].FlagInUse&&!strcmp(UOF[mfdindex][i].FileName,fname))
{
break;
}
}
if (MaxOpenFileNum==i)
{
printf("File was not existed nor opened.");
return -1;
}
fileindex=i;
if (rlength)
{
reachpoint=UOF[mfdindex][fileindex].ReadPointer+rlength;
}
else
{
reachpoint=UOF[mfdindex][fileindex].FileLength-1;
}
if (reachpoint>=UOF[mfdindex][fileindex].FileLength)
{
printf("File length not more than %d.",reachpoint);
return -1;
}
i=0;
for (i=UOF[mfdindex][fileindex].ReadPointer/BlockSize;i<reachpoint/BlockSize+1;i++)
{
b=(UOF[mfdindex][fileindex].ReadPointer<i*BlockSize)?0:UOF[mfdindex][fileindex].ReadPointer%BlockSize;
e=((i+1)*BlockSize-1<reachpoint)?BlockSize-1:reachpoint%BlockSize;
k=0;
for (j=b;j<e;j++)
{
tmpBlock[k++]=BLOCK[UFD[ufdindex].FCB[fileindex].FileBlock[i]].text[j];
}
tmpBlock[k]='\0';
printf("%s",tmpBlock);
}
UOF[mfdindex][fileindex].ReadPointer=reachpoint;
return 0;
}
int Close(char fname[16])
{
int i;
for (i=0;i<MaxOpenFileNum;i++)
{
if (UOF[mfdindex][i].FlagInUse&&!strcmp(UOF[mfdindex][i].FileName,fname))
{
break;
}
}
if (MaxOpenFileNum==i)
{
printf("File has not been opened.");
return -1;
}
UOF[mfdindex][i].FlagInUse=0;
return 0;
}
int Delete(char fname[16])
{
int i;
for (i=0;i<MaxFileNumForUser;i++)
{
if (UFD[ufdindex].FCB[i].FlagInUse&&!strcmp(UFD[ufdindex].FCB[i].FileName,fname))
{
break;
}
}
if (MaxFileNumForUser==i)
{
printf("File not exist.");
return -1;
}
fileindex=i;
for (i=0;i<MaxOpenFileNum;i++)
{
if (UOF[mfdindex][i].FlagInUse&&!strcmp(UOF[mfdindex][i].FileName,fname))
{
printf("Please close file first when you wanna delete it.");
return -1;
}
}
for (i=0;i<MaxBlockNumForFile;i++)
{
BlockIsUse[UFD[ufdindex].FCB[fileindex].FileBlock[i]]=0;
UFD[ufdindex].FCB[fileindex].FileBlock[i]=-1;
}
UFD[ufdindex].FCB[fileindex].FlagInUse=0;
return 0;
}
long StrToInt(char *str)
{
long result=0; int i=0;
while (*(str+i)!='\0'&&*(str+i)>47&&*(str+i)<58)
{
result=result*10+*(str+i++)-48;
}
return result;
}
void ls(int mode)
{
int i;
for (i=0;i<MaxFileNumForUser;i++)
{
if (UFD[ufdindex].FCB[i].FlagInUse)
{
if (mode)
{
printf("%s\t\t%d\t%d\t%s\n",UFD[ufdindex].FCB[i].FileName,UFD[ufdindex].FCB[i].FileLength,UFD[ufdindex].FCB[i].FileAttrib,Directory);
}
else
{
printf("%s\t",UFD[ufdindex].FCB[i].FileName);
}
}
}
}
void lsUFD(void)
{
int i,j,k;
for (i=0;i<MaxUserNum;i++)
{
if (USER[i].FlagInUse)
{
printf("/%s:\n",USER[i].UserName);
for (j=0;j<MaxFileNumForUser;j++)
{
if (UFD[i].FCB[j].FlagInUse)
{
printf("%s\t%d\t%d\t%s\tBlock[",UFD[i].FCB[j].FileName,UFD[i].FCB[j].FileLength,UFD[i].FCB[j].FileAttrib,USER[i].UserName);
for (k=0;k<MaxBlockNumForFile;k++)
{
if (UFD[i].FCB[j].FileBlock[k]!=-1)
{
printf("%d ",UFD[i].FCB[j].FileBlock[k]);
}
}
printf("]\n");
}
}
printf("\n");
}
}
}
void lsUOF(void)
{
int i,j,k;
for (i=0;i<MaxUserNum;i++)
{
if (USER[i].FlagInUse)
{
printf("User: %s\n",USER[i].UserName);
for (j=0;j<MaxOpenFileNum;j++)
{
if (UOF[i][j].FlagInUse)
{
printf("%s\t%d\t%d\t%d\t%s\t%d\t%d\n",UOF[i][j].FileName,UOF[i][j].FileAttrib,UOF[i][j].FileLength,UOF[i][j].FileState,USER[i].UserName,UOF[i][j].ReadPointer,UOF[i][j].WritePointer);
}
}
printf("\n");
}
}
}
void help()
{
printf("\n\tWelcome to use 5428 File System.There are inner commands:");
printf("\n\t---------------------------------------------------------");
printf("\n\t\tadduser USERNAME PASSWORD GROUP");
printf("\n\t\tdeluser USERNAME");
printf("\n\t\tcreate FILENAME LENGTH ATTRIB");
printf("\n\t\topen FILENAME [OPERATE]");
printf("\n\t\tread FILENAME [LENGTH]");
printf("\n\t\twrite FILENAME [WRITEPOINT]");
printf("\n\t\tclose FILENAME");
printf("\n\t\tdelete|rm FILENAME");
printf("\n\t\tufd|UFD");
printf("\n\t\tuof|UOF");
printf("\n\t\tlogin");
printf("\n\t\tend");
printf("\n\t\thelp");
printf("\n\t\tls [-l]");
printf("\n");
}
int main()
{
int i,j,k,argc,key=0;
char cmd[64],argv[4][16],tmp[16];
GeneralInitialize();
// AddUser("ingu","ingu",2);
AddUser("5428","5428",2);
Login_fun();
Create("test",64,1);
while (1)
{
shell();
fflush(stdin);
gets(cmd);
if (!strcmp(cmd,"end"))
{
exit(0);
}
for (i=0;i<4;i++)
{
argv[i][0]='\0';
}
for (argc=0,i=0,j=0;i<64&&cmd[i]!='\0';)
{
if (cmd[i]==' ')
{
argv[argc++][j]='\0'; i++; j=0;
}
argv[argc][j++]=cmd[i++];
}
argv[argc][j]='\0';
if (!strcmp(argv[0],"login"))
{
Login_fun();
}
else if (!strcmp(argv[0],"ls"))
{
if (!strcmp(argv[1],"-l"))
{
ls(1);
}
else
ls(0);
}
else if (!strcmp(argv[0],"adduser"))
{
while (!strcmp(argv[1],""))
{
printf("User Name:");
gets(argv[1]);
}
while (!strcmp(argv[2],""))
{
printf("User Password:");
i=0;fflush(stdin);
while (key!=13&&i<15)
{
if (kbhit())
{
key=getch();
tmp[i++]=key;
}
}
tmp[i-1]='\0';
strcpy(argv[2],tmp);
}
if (!strcmp(argv[3],"1"))
{
k=1;
}
else
{
k=0;
}
AddUser(argv[1],argv[2],k);
}
else if (!strcmp(argv[0],"deluser"))
{
while (!strcmp(argv[1],""))
{
printf("Who do you want to kill?");
gets(argv[1]);
}
DelUser(argv[1]);
}
else if (!strcmp(argv[0],"create"))
{
while (!strcmp(argv[1],""))
{
printf("File Name:");
gets(argv[1]);
}
while (!strcmp(argv[2],""))
{
printf("File Length:");
gets(argv[2]);
}
if (!strcmp(argv[3],"1"))
{
k=1;
}
else
{
k=0;
}
Create(argv[1],(int)StrToInt(argv[2]),k);
}
else if(!strcmp(argv[0],"open"))
{
while (!strcmp(argv[1],""))
{
printf("File Name:");
gets(argv[1]);
}
k=0;
if (!strcmp(argv[2],"1"))
{
k=1;
}
Open(argv[1],k);
}
else if (!strcmp(argv[0],"read"))
{
while (!strcmp(argv[1],""))
{
printf("File Name:");
gets(argv[1]);
}
i=0;
if (strcmp(argv[2],""))
{
i=(int)StrToInt(argv[2]);
}
Read(argv[1],i);
}
else if (!strcmp(argv[0],"write"))
{
while (!strcmp(argv[1],""))
{
printf("File Name:");
gets(argv[1]);
}
i=-1;
if (strcmp(argv[2],""))
{
i=(int)StrToInt(argv[2]);
}
Write(argv[1],i);
}
else if (!strcmp(argv[0],"close"))
{
while (!strcmp(argv[1],""))
{
printf("File Name:");
gets(argv[1]);
}
Close(argv[1]);
}
else if (!strcmp(argv[0],"delete")||!strcmp(argv[0],"rm"))
{
while (!strcmp(argv[1],""))
{
printf("File Name:");
gets(argv[1]);
}
Delete(argv[1]);
}
else if (!strcmp(argv[0],"ufd")||!strcmp(argv[0],"UFD"))
{
lsUFD();
}
else if (!strcmp(argv[0],"uof")||!strcmp(argv[0],"UOF"))
{
lsUOF();
}
else if (!strcmp(argv[0],"help"))
{
help();
}
else printf("%s is not a command!",argv[0]);
}
return 0;
}

、缓冲管理（双缓冲/循环缓冲/缓冲池）
要求：
（1）模拟双缓冲、循环缓冲的读写同步过程（初态（各缓冲区的空、满等）自行给出）；
（2）模拟缓冲池中缓冲区在不同工作方式下，所导致的缓冲队列的变化情况。
其中，初态（空缓冲队列、输入队列、输出队列等）自行给出；选择一种缓冲区的工作方式，查看各缓冲队列的变化情况。
2、设计一个小型文件系统，提供创建、打开、读、写、关闭、删除文件的功能。
其中：（1）. 文件的内容象征性给出；
（2）. 基本文件目录、符号文件目录，活动文件表、活动名字表结构自行给出；
（3）. 提供存储管理功能（内存、外存）；
（4）. 提供文件保密措施。
要求：（1）. 有方便使用的用户界面；
（2）. 要求每执行一次命令（创建、打开、读、写、关闭、删除）后，检查：
基本文件目录、符号文件目录、活动文件表、活动名字表、存储管理情况。

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400行都能实现，
很多程序都行了，

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