:) For starters

You should replace all printf calls (each one of those is an error) with print

You should also replace each instance of print/reading from STDIN with a prompt function call, as in

my $value = prompt($message);
[download]

Whereas prompt resembles the prompt from here

Actually, you should switch from using STDIN to using @ARGV, its much more user friendly

Running the code through perltidy couldn't hurt either