Design In-Memory File System

Statement

Design an in-memory file system by implementing a struct, FileSystem, which should provide the following functionalities:

• Init(): Initializes the object of the system.

• Ls(String path): If path is a file path, return a list that only contains the file’s name. If it’s a directory path, return the list of files and directory names in this directory. Your function should return the output (file and directory names together) in lexicographical order. ...