wenjian

通过课程设计，要求学生主要掌握如下内容：

　　1．文件的物理结构可以选用顺序分配、链表分配或索引分配。

　　2．建立文件：从命令中得到文件名，得到该文件的文件长度，建立文件。修改目录表。

　　3．删除文件：回收文件占用的空间，修改目录表

　　4．读文件：read [文件名] [显示开始字节] [显示的字节数] ，直接显示所需要的字节数。

　　5．写文件：write [文件名] [插入的位置] [插入的内容]

　　6．查询属性：显示文件属性 文件名，类型，长度，时间等-wenjian through curriculum design, requires students to master the following main elements: 1. The physical structure of the file can use sequential allocation, distribution list or index distribution. 2. Build file: get the filename from the command to get the file length, create the file. Modify the table of contents. 3. Delete files: recovery files take up space, modify the table of 4. Read the file: read [filename] [start byte display] [display number of bytes] directly shows the number of bytes required. 5. Write to the file: write [file name] [insert location] [insert the contents of the] 6. Query Properties: displays the file properties file name, type, length, time, etc.