1. enter file name  (you must specify the file name and press Enter)
2. do you want to specify another file name (Y/N) (you must enter N in most cases and press Enter)
3.enter name for output file (you must specify a name for the output file, eg ttt and press Enter)

##</code><code>##

run_prog (name of the program) myfile.txt N myfile.txt.out