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 fnameMAXNAME； /*file name*/ OSFILE;typedef struct /*the structure of OSUFD*/ char ufdnameMAXNAME； /*ufd name*/ OSFILE ufdfileMAXCHILD； /*ufd own file*/ OSUFD;typedef struct /*the structure of OSUFDLOGIN*/ char ufdnameMAXNAME； /*ufd name*/ char ufdpword8； /*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 *ufdMAXCHILD； /*ufd and ufd own files*/OSUFD_LOGIN ufd_lp;int ucount=0； /*the count of mfds ufds*/int fcountMAXCHILD； /*the count of ufds files*/int loginsuc=0；/*whether login successfully*/char usernameMAXNAME； /*record login users name22*/char dirnameMAXNAME;/*record current directory*/int fpaddrnoMAX； /*record file physical address num*/OSUFD_OPENMODE ifopenMAXCHILDMAXCHILD；/*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 choice50； /*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:osfilemfd,rb)=NULL) fp_mfd=fopen(c:osfilemfd,wb); fclose(fp_mfd); for(i=0;i,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 Listn);printf(nCd Attrib Creat Modify Read Open Cls Delete Exit Closen);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 (nufdname,strupr(ufd_lp.ufdname); fp_ufd=fopen(str,rb); fcountj=0; for(i=0;fread(&ufdj-ufdfilei,sizeof(OSFILE),1,fp_ufd)!=0;i+,fcountj+) ifopenji.ifopen=0; ifopenji.openmode=4; fclose(fp_ufd); fclose(fp_mfd); ucount=j; SetPANo(0); printf(nnLogin successful！Welcome to this FileSystemnn); loginsuc=1; return; else printf(nn); 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(ufdname,strupr(ufd_lp.ufdname); fp_ufd=fopen(str,rb); for(i=0;fread(&ufdj-ufdfilei,sizeof(OSFILE),1,fp_ufd)!=0;i+,fcountj+) ifopenji.ifopen=0; ifopenji.openmode=4; fclose(fp_ufd); fclose(fp_mfd); ucount=j; SetPANo(0); printf(nnLogin Successful！Welcome to this Systemnn); loginsuc=1; return; else printf(nn); 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:osfilefilefile_p,rb)=NULL) fp_file_p=fopen(c:osfilefilefile_p,wb); fclose(fp_file_p); fp_file_p=fopen(c:osfilefilefile_p,rb); for(i=0;fread(&j,sizeof(int),1,fp_file_p)!=0;i+) fpaddrnoj=1; /*for(i=1;iMAX;i+) if (i%13)=0) fpaddrnoi=1;*/ else fp_file_p=fopen(c:osfilefilefile_p,wb); /*for(i=1;iMAX;i+) if(i%13)=0) fpaddrnoi=0;*/ for(i=0;iMAX;i+) if (fpaddrnoi=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;j0) j-;j-; putchar(b);putchar( );putchar(b); else j-; else passwordj=0; break; passwordj=0;void DirF() /*Dir FileSystem*/int i,j,count=0; char sfmode25,sfpaddr25,str25; int ExistD(char *dirname)； /*Whether DirName Exist,Exist-i,Not Exist-0*/ clrscr(); if (strcmp(strupr(ltrim(rtrim(dirname),)!=0) printf(nnC:%sdirn,dirname)； printf(n%14s%16s%14s%10s%18sn,FileName,FileAddress,FileLength,Type,FileMode); j=ExistD(dirname); for(i=0;iufdfilei.fpaddr,str,10); strcpy(sfpaddr,file); strcat(sfpaddr,str); if (ufdj-ufdfilei.fmode=0) strcpy(sfmode,Read Only); else if(ufdj-ufdfilei.fmode=1) strcpy(sfmode,Write Only); else if(ufdj-ufdfilei.fmode=2)strcpy(sfmode,Read And Write); else strcpy(sfmode,Protect);printf(%14s%16s%14d%10s%18sn,ufdj-ufdfilei.fname,sfpaddr,ufdj-ufdfilei.flength,sfmode); printf(n %3d file(s)n,fcountj); else printf(nnC:dirn); printf(n%14s%18s%8sn,DirName,OwnFileCount,Type); for(i=0;iufdname,fcounti,); count=count+fcounti; 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;iufdname),strupr(dirname)=0) exist=1; break; if (exist) return(i); else return(-1);void CdF() /*Exchange Dir*/char dnameMAXNAME; 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 fnameMAXNAME,str50,str150,strtext255,a25; char fmode25; 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(ufdi-ufdfilefcounti.fname,fname); ufdi-ufdfilefcounti.fpaddr=fpaddrno; ufdi-ufdfilefcounti.fmode=atoi(fmode); ifopenifcounti.ifopen=0; ifopenifcounti.openmode=4; strcpy(str,c:osfilefilefile); itoa(fpaddrno,str1,10); strcat(str,str1); fp_file=fopen(str,wb); fclose(fp_file); fcounti+; while(flag) printf(Input text now(Y/N):); gets(a); ltrim(rtrim(a); ufdi-ufdfilefcounti-1.flength=0; if(strcmp(strupr(a),Y)=0) fp_file=fopen(str,wb+); ufdi-ufdfilefcounti-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. FileModes Rang