文件名称:shiyan_4
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程序主要模拟了系统文件管理的功能，主要功能有：
MD:在目录文件中创建子目录,同时搜索当前目录最后一个目录项,并保存指针信息
CD:根据当前目录切换到指定目录
RD:搜索所要删除的目录是否为空目录，若是则删除
MK:在当前目录中创建文件名称(申请空间利用位示图修改FAT)
DEL:搜索所要删除的文件是否存在，若是则删除(恢复位示图修改FAT)
DIR:列出当前目录的所有目录项
DIR1:列出当前目录的位示图-The main program to simulate the functions of document management systems, the main function: MD: files in the directory to create a subdirectory, while the current directory search directory of the last items, and save pointer information CD: According to the current directory to switch to the specified directory RD: to search to delete the directory if the directory is empty, if the deletion of MK: in the current directory, create a file name (the application of space that plans to amend the use of digital FAT) DEL: search the document you want to delete the existence, if the delete (to restore FAT-bit show plans to amend ) DIR: current directory lists all the directory entry DIR1: the spaces are listed in the current directory showing map
MD:在目录文件中创建子目录,同时搜索当前目录最后一个目录项,并保存指针信息
CD:根据当前目录切换到指定目录
RD:搜索所要删除的目录是否为空目录，若是则删除
MK:在当前目录中创建文件名称(申请空间利用位示图修改FAT)
DEL:搜索所要删除的文件是否存在，若是则删除(恢复位示图修改FAT)
DIR:列出当前目录的所有目录项
DIR1:列出当前目录的位示图-The main program to simulate the functions of document management systems, the main function: MD: files in the directory to create a subdirectory, while the current directory search directory of the last items, and save pointer information CD: According to the current directory to switch to the specified directory RD: to search to delete the directory if the directory is empty, if the deletion of MK: in the current directory, create a file name (the application of space that plans to amend the use of digital FAT) DEL: search the document you want to delete the existence, if the delete (to restore FAT-bit show plans to amend ) DIR: current directory lists all the directory entry DIR1: the spaces are listed in the current directory showing map
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shiyan_4.cpp