Of course, every operating system that offers filesystem support also comes with some kind of utility that does just list all files within a directory in the filesystem. The simplest examples are the ls command on Linux, MacOS, and other UNIX-related operating systems. In DOS and Windows, there is the dir command. Both list all files in a directory and provide supplemental information such as file size, permissions, and so on.
Reimplementing such a tool is, however, also a nice standard task to get going with directory and file traversal. So, let's just do that!
Our own ls/dir utility will be able to list all items in a directory by name, indicate what kind of items there are, list their access permission flags, and display the number of bytes they occupy on the filesystem.
