matlab文件操作及读txt文件，文件的打开与关闭，二进制文件的读写操作等等，对应的函数-the matlab file operations and read txt file, the opening and closing of files, binary file read and write operations, and so on, the corresponding function

用来读取二进制文件和写入二进制文件的函数(it can be wrrited binary file by matlab)