Inside the Talley Student Center (where some events, concerts, and rehearsals will take place) there are various quick service restaurants and there is also a convenience store.
For "real" food, you will need to make your way to Hillsborough Street. From the Talley Student Center walk north, go under the railroad tracks, and keep walking North until you hit Hillsborough Street. See this Map. Click on the Central and North Campus portions.
There you can find many restaurants of various types, ethnicities, and prices. They change surprisingly often. Here are a few highlights.
More expensive, but worth it:
McDaid's -- Irish Pub. Can be loud at night.
Kebab and Curry -- Indian and Nepalese food.
Player's Retreat - sports bar with steaks, ribs, chops and less-expensive items such as burgers and sandwiches.