This is a reposting of a popular topic here at the library, how to print without your Wildcat Express Card (you can’t, really, without difficulty).
To print in the library, you will need this card. Don’t leave anywhere without it. The printers don’t take cash. A second alternative is to hit up your friend who may have come with you who brought theirs (or desperately search one out at the library). Or hit up a total stranger. The odds drop, though. Best to always keep your card with you.