1.c

一个简单模拟文件系统的C程序

#define         XCONST   22   
  #define         YCONST   11   
  #define         CONST   100   
  #include             <io.h>   
  #include           <dos.h>   
  #include       <conio.h>   
  #include       <stdio.h>   
  #include     <string.h>   
  #include   <process.h>   
    
  void   EXIT(void);   
  void   ERROR(void);   
  void   SEARCH(void);   
  void   DELETE(void);   
  void   RENAME(void);   
  void   CHECK_RW(char   *FILENAME);   
  void   CHECK_R(char   *FILENAME);   
  void   CHECK_W(char   *FILENAME);   
  void   CHECK_EXE(char   *FILENAME);   
  void   GETPRIVILEGE(void);   
    
  void   main(void)   
  {   
  char   CHOICE;   
  while   (1)   
  {   
  clrscr();   
  printf("-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*\n"   
      "                   THE   DEMO   DISPLAY   FOR   THE   FILE   SYSTEM                   \n"   
      "                                                                                                             \n"   
      "                         1   :   DETECT   A   FILE   EXIST   OR   NOT                         \n"   
      "                         2   :   GET   THE   OPRATING   PRIVILEGE   OF   THE   FILE\n"   
      "                         3   :   RENAME   A   FILE                                                   \n"   
      "                         4   :   REMOVE   A   FILE                                                   \n"   
      "                         5   :   QUIT   AT   ONCE                                                     \n"   
      "\n");   
  do   
  {   
  printf("\n PLEASE   ENTER   YOUR   CHOICE   :");   
  CHOICE=getch();   
  putch(CHOICE);   
  }while((CHOICE<'1')||(CHOICE>'5'));   
  printf("\n\n");   
  switch   (CHOICE)   
  {   
  case   '1'   : SEARCH();   
  break;   
  case   '2'   :           GETPRIVILEGE();   
  break;   
  case   '3'   : RENAME();   
  break;   
  case   '4'   : DELETE();   
  break;   
  case   '5'   : EXIT();   
  break;   
  default     : ERROR();   
  break;   
  }   
  }   
  }   
    
  void   EXIT(void)   
  {   
  exit(1);   
  }   
    
  void   RENAME(void)   
  {   
  char   SOURCE[CONST];   
  char   TARGET[CONST];   
  int   STATE;   
  printf("ENTER   THE   ORIGINAIL   FILE   NAME   :   ");   
  gets(SOURCE);   
  printf("ENTER   THE   NEW   FILE   NAME   :   ");   
  gets(TARGET);   
  STATE=rename(SOURCE,TARGET);   
  if   (STATE!=0)   
  {   
  printf("ERROR   :   CAN   NOT   RENAME   %s   TO   %s   !\n",SOURCE,TARGET);   
  }   
  else   
  printf("%s   HAS   BEEN   RENAMED   TO   BE   %s   .   \n",SOURCE,TARGET);   
  getch();   
  }   
    
  void   DELETE(void)   
  {   
  char   FILENAME[CONST];   
  int   STATE;   
  printf("ENTER   THE   FILE   TO   REMOVE   PLEASE   :   ");   
  gets(FILENAME);   
  STATE=remove(FILENAME);   
  if   (STATE==-1)   
  {   
  printf("ERROR   :   CAN   NOT   REMOVE   YOUR   INPUT   FILE   %s   !\n",FILENAME);   
  }   
  else   
  printf("%s   HAS   BEEN   REMOVED   SUCCESSFULLY   !\n",FILENAME);   
  getch();   
  }   
    
  void   GETPRIVILEGE(void)   
  {   
  char   CHOICE;   
  char   FILENAME[CONST];   
  do   
  {   
  clrscr();   
  printf("-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*\n"   
      "                           OPRATING   PRIVILEGE\n"   
      "\n"   
      "                         1   :   READ   AND   WRITE\n"   
      "                         2   :   READ\n"   
      "                         3   :   WRITE\n"   
      "                         4   :   EXECUTE\n"   
      "                         5   :   EXIT\n"   
      "\n"   );   
  do   
  {   
  printf("\n PLEASE   ENTER   YOUR   CHOICE   :");   
  CHOICE=getch();   
  putch(CHOICE);   
  }while((CHOICE<'1')||(CHOICE>'5'));   
  if(CHOICE!='5')   
  {   
  printf("\nPLEASE   INPUT   A   FILE   NAME   :   ");   
  gets(FILENAME);   
  if   (access(FILENAME,0)==-1)   
  {   
  printf("%s   DOES   NOT   EXIST   IN   THE   HARDDISK   !\n",FILENAME);   
  }   
  }   
  if((CHOICE=='5')||(access(FILENAME,0)==0))   
  {   
  printf("\n\n");   
  switch   (CHOICE)   
  {   
  case   '1'   : CHECK_RW(FILENAME);   
  break;   
  case   '2'   :           CHECK_R(FILENAME);   
  break;   
  case   '3'   : CHECK_W(FILENAME);   
  break;   
  case   '4'   : CHECK_EXE(FILENAME);   
  break;   
  case   '5'   : printf("\nPress   any   key   to"   
  "return   to   main   menu...   ...");   
  break;   
  default     : ERROR();   
  break;   
  }   
  }/*else*/   
  }while(CHOICE!='5');   
  }   
  void   CHECK_RW(char   *FILENAME)   
  {   
  if   (access(FILENAME,6)==0)   
  {   
  printf("%s   :   READ   AND   WRITE",FILENAME);   
  }   
  else   
  {   
  printf("%s   DOES   NOT   HAVE   THE   PRIVILEGE"   
  "FOR   WRITING   AND   READING!",FILENAME);   
  }   
  getch();   
  }   
  void   CHECK_R(char   *FILENAME)   
  {   
  if   (access(FILENAME,4)==0)   
  {   
  printf("%s   :   READ",FILENAME);   
  }   
  else   
  {   
  printf("%s   DOES   NOT   HAVE   THE   PRIVILEGE   FOR   READING!",FILENAME);   
  }   
  getch();   
  }   
  void   CHECK_W(char   *FILENAME)   
  {   
  if   (access(FILENAME,2)==0)   
  {   
  printf("%s   :   READ",FILENAME);   
  }   
  else   
  {   
  printf("%s   DOES   NOT   HAVE   THE   PRIVILEGE   FOR   WRITING!",FILENAME);   
  }   
  getch();   
  }   
  void   CHECK_EXE(char   *FILENAME)   
  {   
  if   (access(FILENAME,1)==0)   
  {   
  printf("%s   :   READ",FILENAME);   
  }   
  else   
  {   
  printf("%s   DOES   NOT   HAVE   THE   PRIVILEGE   FOR   EXECUTING!",FILENAME);   
  }   
  getch();   
  }   
  void   SEARCH(void)   
  {   
  char   FILENAME[CONST];   
  printf("\n   PLEASE   INPUT   A   FILE   NAME   :   ");   
  gets(FILENAME);   
  if   (access(FILENAME,0)==-1)   
  {   
  printf("%s   DOES   NOT   EXIST   IN   THE   HARDDISK   !\n",FILENAME);   
  }   
  else   
  printf("%s   EXISTS   .\n",FILENAME);   
  getch();   
  }   
    
  void   ERROR(void)   
  {   
  nosound();   
  sound(CONST*10);   
  delay(CONST*2);   
  sound(CONST*20);   
  delay(CONST*5);   
  nosound();   
  }