Prepare a linux shell (in other words, write a C/C++ program) that will recursively prompt for input from the user. The shell should prompt as
yourRollNumber-currentDirectoryName>
For instance if the current directory is /home/OS, the shell should prompt as: B-12345-OS>
For example purpose, consider the following file structure, the current working directory is named as OS and it contains a file hogwarts.txt and two sub-directories called teachers (which has two files called dumbeldore.txt and snape.pdf) and students (which has a subdirectory called gryffindor which has a file called harry.vlc)
