用C语言模拟小型类UNIX文件系统， 文件系统被分成三个部分，依次为：位视图，I节点区和数据区。数据区被分成1024块，每块有1024个字节。用一个文件模拟外存，在程序中用数组分别模拟内存中的I节点，位图，文件系统。在每一次的操作中如果相应元素有变动，则对应在文件中更新输出相应数据。-Small classes in C language simulation UNIX file system, file system is divided into three parts, as follows: bit view, I node area and data area. Data area is divided into 1024 blocks, each block is 1024 bytes. Simulate external memory with a file, were simulated in the program memory array using the I node, bitmap, the file system. In every operation the corresponding element if there are any changes, then the corresponding output in the file, update the corresponding data.