操作系统专业课程设计范文样本.doc

课程设计

学生学院 计算机学院
专业班级 12(1)班
学 号 311351
学生姓名 吴炜文
指引教师 李敏

1 月 10 日

目录
1 简朴文献系统…………………………………………………………

文献系统
一、实验目:
模仿文献管理功能，理解各种文献操作。
二、实验内容：
1、设计一种10个顾客文献系统，每次顾客可保存10个文献，一次运营顾客可以打开5个文献
2、程序采用二级文献目录（即设立主目录[MFD]）和顾客文献目录（UED）。此外，为打开文献设立了运营文献目录（AFD）。
3、为了便于实现，对文献读写作了简化，在执行读写命令时，只需改读写指针，并不进行实际读写操作。
4、算法与框图：
a、因系统小，文献目录检索使用了简朴线性搜索。
b、文献保护简朴使用了三位保护码：容许读写执行、相应位为 1，相应位为0，则表达不容许读写、执行。
c、程序中使用重要设计构造如下：
i  主文献目录和顾客文献目录（ MFD、UFD）
ii 打开文献目录（ AFD）（即运营文献目录）
规定：用高档语言编写和调试一种简朴文献系统，模仿文献管理工作过程。从而对各种文献操作命令实质内容和执行过程有比较进一步理解。
规定设计一种 n个顾客文献系统，每次顾客可保存m个文献，顾客在一次运营中只能打开一种文献，对文献必要设立保护办法，且至少有Create、delete、open、close、read、write等命令。
  文献系统算法流程图如下：

三、源代码及运营成果：
#include "stdio.h"
#include "string.h"
#include "conio.h"
#include "stdlib.h"
#define MAXNAME 25 /*the largest length of mfdname,ufdname,filename*/
#define MAXCHILD 50 /*the largest child*/
#define MAX (MAXCHILD*MAXCHILD) /*the size of fpaddrno*/
typedef struct /*the structure of OSFILE*/
{int fpaddr； /*file physical address*/
int flength； /*file length*/
int fmode； /*file mode:0-Read Only;1-Write Only;2-Read and Write(default);*/
char fname[MAXNAME]； /*file name*/
} OSFILE;
typedef struct /*the structure of OSUFD*/
{char ufdname[MAXNAME]； /*ufd name*/
OSFILE ufdfile[MAXCHILD]； /*ufd own file*/
}OSUFD;
typedef struct /*the structure of OSUFD'LOGIN*/
{char ufdname[MAXNAME]； /*ufd name*/
char ufdpword[8]； /*ufd password*/
} OSUFD_LOGIN;
typedef struct /*file open mode*/
{int ifopen； /*ifopen:0-close,1-open*/
int openmode； /*0-read only,1-write only,2-read and write,3-initial*/
}OSUFD_OPENMODE;
OSUFD *ufd[MAXCHILD]； /*ufd and ufd own files*/
OSUFD_LOGIN ufd_lp;
int ucount=0； /*the count of mfd's ufds*/
int fcount[MAXCHILD]； /*the count of ufd's files*/
int loginsuc=0；/*whether login successfully*/
char username[MAXNAME]； /*record login user's name22*/
char dirname[MAXNAME];/*record current directory*/
int fpaddrno[MAX]； /*record file physical address num*/
OSUFD_OPENMODE ifopen[MAXCHILD][MAXCHILD]；/*record file open/close*/
int wgetchar；/*whether getchar()*/
FILE *fp_mfd,*fp_ufd,*fp_file_p,*fp_file;
void main()
{int i,j,choice1;
char choice[50]； /*choice operation:dir,create,delete,open,delete,modify,read,write*/
int choiceend=1； /*whether choice end*/
char *rtrim(char *str)； /*remove the trailing blanks.*/
char *ltrim(char *str)； /*remove the heading blanks.*/
void LoginF()； /*LOGIN FileSystem*/
void DirF()； /*Dir FileSystem*/
void CdF()； /*Change Dir*/
void CreateF()； /*Create File*/
void DeleteF()；/*Delete File*/
void ModifyFM()；/*Modify FileMode*/
void OpenF()； /*Open File*/
void CloseF()； /*Close File*/
void ReadF()；/*Read File*/
void WriteF()；/*Write File*/
void QuitF()；/*Quit FileSystem*/
void help();
if((fp_mfd=fopen("c:\\osfile\\mfd","rb"))==NULL)
{fp_mfd=fopen("c:\\osfile\\mfd","wb");
fclose(fp_mfd);
}
for(i=0;i<MAX;i++) fpaddrno[i]=0;
textattr(BLACK*16|WHITE);
clrscr()； /*clear screen*/
LoginF()； /*user login*/
clrscr();
if(loginsuc==1) /*Login Successfully*/
{while (1)
{wgetchar=0;
if (choiceend==1)
{printf("\n\nC:\\%s>",strupr(dirname));}
else printf("Bad command or file name.\nC:\\%s>",strupr(username));
gets(choice);
strcpy(choice,ltrim(rtrim(strlwr(choice))));
if (strcmp(choice,"dir")==0) choice1=1;
else if(strcmp(choice,"creat")==0) choice1=2;
else if(strcmp(choice,"delete")==0) choice1=3;
else if(strcmp(choice,"attrib")==0) choice1=4;
else if(strcmp(choice,"open")==0) choice1=5;
else if(strcmp(choice,"close")==0) choice1=6;
else if(strcmp(choice,"read")==0) choice1=7;
else if(strcmp(choice,"modify")==0) choice1=8;
else if(strcmp(choice,"exit")==0) choice1=9;
else if(strcmp(choice,"cls")==0) choice1=10;
else if(strcmp(choice,"cd")==0) choice1=11;
else if(strcmp(choice,"help")==0) choice1=20;
else choice1=12;
switch(choice1)
{case 1:DirF();choiceend=1;break;
case 2:CreateF();choiceend=1;if(!wgetchar) getchar();break;
case 3:DeleteF();choiceend=1;if(!wgetchar)getchar();break;
case 4:ModifyFM();choiceend=1;if(!wgetchar) getchar();break;
case 5:choiceend=1;OpenF();if (!wgetchar) getchar();break;
case 6:choiceend=1;CloseF();if (!wgetchar) getchar();break;
case 7:choiceend=1;ReadF();if (!wgetchar) getchar();break;
case 8:choiceend=1;WriteF();if (!wgetchar) getchar();break;
case 9:printf("\nYou have exited this system.");
QuitF();exit(0);break;
case 10:choiceend=1;clrscr();break;
case 11:CdF();choiceend=1;break;
case 20:help();choiceend=1;break;
default:choiceend=0;
}
}
}
else printf("\nAccess denied.");
}
void help(void)
{
printf("\nThe Command List\n");
printf("\nCd Attrib Creat Modify Read Open Cls Delete Exit Close\n");
}
char *rtrim(char *str) /*remove the trailing blanks.*/
{int n=strlen(str)-1;
while(n>=0)
{if(*(str+n)!=' ')
{*(str+n+1)='\0';
break;
}
else n--;
}
if (n<0) str[0]='\0';
return str;
}
char *ltrim(char *str) /*remove the heading blanks.*/
{char *rtrim(char *str);
strrev(str);
rtrim(str);
strrev(str);
return str;
}
void LoginF() /*LOGIN FileSystem*/
{char loginame[MAXNAME],loginpw[9],logincpw[9],str[50];
int i,j,flag=1;
char a[25];
int findout；/*login user not exist*/
char *rtrim(char *str)； /*remove the trailing blanks.*/
char *ltrim(char *str)； /*remove the heading blanks.*/
void InputPW(char *password)； /*input password,use '*' replace*/
void SetPANo(int RorW)； /*Set physical address num*/
while(1)
{findout=0;
printf("\n\nLogin Name:");
gets(loginame);
ltrim(rtrim(loginame));
fp_mfd=fopen("c:\\osfile\\","rb");
for(i=0;fread(&ufd_lp,sizeof(OSUFD_LOGIN),1,fp_mfd)!=0;i++)
if (strcmp(strupr(ufd_lp.ufdname),strupr(loginame))==0)
{findout=1;
strcpy(logincpw,ufd_lp.ufdpword);
}
fclose(fp_mfd);
if (findout==1) /*user exist*/
{printf("Login Password:");
InputPW(loginpw)；/*input password,use '*' replace*/
if (strcmp(loginpw,logincpw)==0)
{strcpy(username,strupr(loginame));
strcpy(dirname,username);
fp_mfd=fopen("c:\\osfile\\","rb");
for(j=0;fread(&ufd_lp,sizeof(OSUFD_LOGIN),1,fp_mfd)!=0;j++)
{strcpy(str,"c:\\osfile\\");
strcat(str,ufd_lp.ufdname);
ufd[j]=(OSUFD*)malloc(sizeof(OSUFD));
strcpy(ufd[j]->ufdname,strupr(ufd_lp.ufdname));
fp_ufd=fopen(str,"rb");
fcount[j]=0;
for(i=0;fread(&ufd[j]->ufdfile[i],sizeof(OSFILE),1,fp_ufd)!=0;i++,fcount[j]++)
{ifopen[j][i].ifopen=0;
ifopen[j][i].openmode=4;}
fclose(fp_ufd);}
fclose(fp_mfd);
ucount=j;
SetPANo(0);
printf("\n\nLogin successful！Welcome to this FileSystem\n\n");
loginsuc=1;
return;}
else
{printf("\n\n");
flag=1;
while(flag)
{printf("Login Failed！ Password Error. Try Again(Y/N):");
gets(a);
ltrim(rtrim(a));
if (strcmp(strupr(a),"Y")==0) {loginsuc=0;flag=0;}
else if(strcmp(strupr(a),"N")==0){loginsuc=0;flag=0;return;}
}
} }
else
{printf("New Password(<=8):");
InputPW(loginpw)；/*input new password,use '*' replace*/
printf("\nConfirm Password(<=8):")；/*input new password,use '*' replace*/
InputPW(logincpw);
if (strcmp(loginpw,logincpw)==0)
{strcpy(ufd_lp.ufdname,strupr(loginame));
strcpy(ufd_lp.ufdpword,loginpw);
fp_mfd=fopen("c:\\osfile\\","ab");
fwrite(&ufd_lp,sizeof(OSUFD_LOGIN),1,fp_mfd);
fclose(fp_mfd);
strcpy(username,strupr(loginame));
strcpy(dirname,loginame);
strcpy(str,"c:\\osfile\\");
strcat(str,username);
if((fp_ufd=fopen(str,"rb"))==NULL)
{fp_ufd=fopen(str,"wb");
fclose(fp_ufd);
}
fp_mfd=fopen("c:\\osfile\\","rb");
for(j=0;fread(&ufd_lp,sizeof(OSUFD_LOGIN),1,fp_mfd)!=0;j++)
{strcpy(str,"c:\\osfile\\");
strcat(str,ufd_lp.ufdname);
ufd[j]=(OSUFD*)malloc(sizeof(OSUFD));
strcpy(ufd[j]->ufdname,strupr(ufd_lp.ufdname));
fp_ufd=fopen(str,"rb");
for(i=0;fread(&ufd[j]->ufdfile[i],sizeof(OSFILE),1,fp_ufd)!=0;i++,fcount[j]++)
{ifopen[j][i].ifopen=0;
ifopen[j][i].openmode=4;}
fclose(fp_ufd);}
fclose(fp_mfd);
ucount=j;
SetPANo(0);
printf("\n\nLogin Successful！Welcome to this System\n\n");
loginsuc=1;
return;
}
else
{printf("\n\n");
flag=1;
while(flag)
{printf("Login Failed！Password Error. Try Again(Y/N):");
gets(a);
ltrim(rtrim(a));
if (strcmp(strupr(a),"Y")==0) {loginsuc=0;flag=0;}
else if(strcmp(strupr(a),"N")==0){loginsuc=0;flag=0;return;}
} } } } }
void SetPANo(int RorW) /*Set physical address num,0-read,1-write*/
{int i,j;
if (RorW==0)
{if((fp_file_p=fopen("c:\\osfile\\file\\file_p","rb"))==NULL)
{fp_file_p=fopen("c:\\osfile\\file\\file_p","wb");
fclose(fp_file_p);
}
fp_file_p=fopen("c:\\osfile\\file\\file_p","rb");
for(i=0;fread(&j,sizeof(int),1,fp_file_p)!=0;i++)
fpaddrno[j]=1;
/*for(i=1;i<MAX;i++)
if ((i%13)==0) fpaddrno[i]=1;*/
}
else
{fp_file_p=fopen("c:\\osfile\\file\\file_p","wb");
/*for(i=1;i<MAX;i++)
if((i%13)==0) fpaddrno[i]=0;*/
for(i=0;i<MAX;i++)
if (fpaddrno[i]==1)
fwrite(&i,sizeof(int),1,fp_file_p);
}
fclose(fp_file_p);
}
void InputPW(char *password) /*input password,use '*' replace*/
{int j;
for(j=0;j<=7;j++)
{password[j]=getch();
if ((int)(password[j])!=13)
{if((int)(password[j])!=8)
putchar('*');
else
{if (j>0)
{j--;j--;
putchar('\b');putchar(' ');putchar('\b');
}
else j--;
}
}
else
{password[j]='\0';
break;
}
}
password[j]='\0';
}
void DirF() /*Dir FileSystem*/
{int i,j,count=0;
char sfmode[25],sfpaddr[25],str[25];
int ExistD(char *dirname)； /*Whether DirName Exist,Exist-i,Not Exist-0*/
clrscr();
if (strcmp(strupr(ltrim(rtrim(dirname))),"")!=0)
{printf("\n\nC:\\%s>dir\n",dirname)； printf("\n%14s%16s%14s%10s%18s\n","FileName","FileAddress","FileLength","Type","FileMode");
j=ExistD(dirname);
for(i=0;i<fcount[j];i++)
{if ((i%16==0)&&(i!=0))
{printf("\nPress any key to continue..");
getch();
clrscr()； printf("\n%14s%16s%14s%10s%18s\n","FileName","FileAddress","FileLength","Type","FileMode");
}
itoa(ufd[j]->ufdfile[i].fpaddr,str,10);
strcpy(sfpaddr,"file");
strcat(sfpaddr,str);
if (ufd[j]->ufdfile[i].fmode==0) strcpy(sfmode,"Read Only");
else if(ufd[j]->ufdfile[i].fmode==1) strcpy(sfmode,"Write Only");
else if(ufd[j]->ufdfile[i].fmode==2)strcpy(sfmode,"Read And Write");
else strcpy(sfmode,"Protect");
printf("%14s%16s%14d%10s%18s\n",ufd[j]->ufdfile[i].fname,sfpaddr,ufd[j]->ufdfile[i].flength,"<FILE>",sfmode);
}
printf("\n %3d file(s)\n",fcount[j]);}
else
{printf("\n\nC:\\>dir\n");
printf("\n%14s%18s%8s\n","DirName","OwnFileCount","Type");
for(i=0;i<ucount;i++)
{if ((i%16==0)&&(i!=0))
{printf("\nPress any key to continue...");
getch();
clrscr();
printf("\n%14s%18s%8s\n","DirName","OwnFileCount","Type");
}
printf("%14s%18d%8s\n",ufd[i]->ufdname,fcount[i],"<UFD>");
count=count+fcount[i];
}
printf("\n %3d dir(s),%5d file(s)\n",ucount,count);
}
}
int ExistD(char *dirname) /*Whether DirName Exist,Exist-i,Not Exist-0*/
{int i;
int exist=0;
for(i=0;i<ucount;i++)
if (strcmp(strupr(ufd[i]->ufdname),strupr(dirname))==0)
{exist=1;
break;
}
if (exist) return(i);
else return(-1);
}
void CdF() /*Exchange Dir*/
{char dname[MAXNAME];
char *rtrim(char *str)； /*remove the trailing blanks.*/
char *ltrim(char *str)； /*remove the heading blanks.*/
int ExistD(char *filename)； /*Whether FileName Exist,Exist-i,Not Exist-0*/
printf("\nPlease input DirName (cd..-Previous dir；DirNAME-cd [DirNAME]):");
gets(dname);
ltrim(rtrim(dname));
if (ExistD(dname)>=0) strcpy(dirname,strupr(dname));
else if(strcmp(strupr(dname),"CD..")==0) strcpy(ltrim(rtrim(dirname)),"");
else printf("\nError.\'%s\' does not exist.\n",dname);
}
void CreateF() /*Create File*/
{int fpaddrno,flag=1,i;
char fname[MAXNAME],str[50],str1[50],strtext[255],a[25];
char fmode[25];
char *rtrim(char *str)； /*remove the trailing blanks.*/
char *ltrim(char *str)； /*remove the heading blanks.*/
int FindPANo()； /*find out physical address num*/
int WriteF1()；/*write file*/
int ExistF(char *filename)； /*Whether FileName Exist,Exist-i,Not Exist-0*/
int ExistD(char *dirname);
if (strcmp(strupr(dirname),strupr(username))!=0)
{printf("\nError. You must create file in your own dir.\n");wgetchar=1;}
else
{ printf("\nPlease input FileName:");
gets(fname);
ltrim(rtrim(fname));
if (ExistF(fname)>=0)
{printf("\nError. Name \'%s\' has already existed.\n",fname);
wgetchar=1;
}
else
{printf("Please input FileMode(0-Read Only，1-Write Only，2-Read and Write，3-Protect):");
gets(fmode);
ltrim(rtrim(fmode))； if((strcmp(fmode,"0")==0)||(strcmp(fmode,"1")==0)||(strcmp(fmode,"2")==0)||(strcmp(fmode,"3")==0))
{fpaddrno=FindPANo();
if (fpaddrno>=0)
{i=ExistD(username);
strcpy(ufd[i]->ufdfile[fcount[i]].fname,fname);
ufd[i]->ufdfile[fcount[i]].fpaddr=fpaddrno;
ufd[i]->ufdfile[fcount[i]].fmode=atoi(fmode);
ifopen[i][fcount[i]].ifopen=0;
ifopen[i][fcount[i]].openmode=4;
strcpy(str,"c:\\osfile\\file\\file");
itoa(fpaddrno,str1,10);
strcat(str,str1);
fp_file=fopen(str,"wb");
fclose(fp_file);
fcount[i]++;
while(flag)
{printf("Input text now(Y/N):");
gets(a);
ltrim(rtrim(a));
ufd[i]->ufdfile[fcount[i]-1].flength=0;
if(strcmp(strupr(a),"Y")==0)
{fp_file=fopen(str,"wb+");
ufd[i]->ufdfile[fcount[i]-1].flength=WriteF1();
flag=0;
}
else if(strcmp(strupr(a),"N")==0){flag=0;wgetchar=1;}
}
printf("\n\'%s\' has been created successfully!\n",fname);
}
else
{printf("\nFail!No Disk Space. Please format your disk.\n");wgetchar=1;}
}
else {printf("\nError. FileMode\'s Rang