until
echoListDirectory..........1
echoChangeDirectory........2
echoEditFile...............3
echoRemoveFile.............4
echoExitMenu...............5

readchoice
test$choice=5
do
case$choicein
1)ls;;
2)echoEntertargetdirectory
readdir
cd$dir
;;
3)echoEnterfilename
readfile
vi$file
;;
4)echoEnterfilename
readfile
rm$file
;;
q|Q|5)echoGoodbye;;
*)echoillegalOption
esac
done

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