a past student here
There are many areas to eat at the Main Campus. The MAC has an Einstein's Bagels. The SRC has the E.E. Gibson cafeteria with Sodexho as the main food provider. Sodexho generally does a great job with the cafeteria food. They also occasionally have outside food places, such as the Subway that's currently there. They have a fairly nice vegetarian selection, and a friendly staff. They also have a wide variety of drinks and chips, and a thermos you can purchase which lets you have free refills of any fountain beverage (including coffee, tea, and hot chocolate). Next to the coffee and soda fountains there is also a milkshake/smoothie machines, or you can get smoothies from Cyclone Salads.
All the way over in the K building, there's a Pal Joey's Cafe which has amicable and friendly staff, tax already in the price, and a changing special everyday that has a wider range than the E.E. Gibson cafeteria, though weekly specials have recently begun to be offered at The Grill and Cyclone Salads. Pal Joey's and E.E. Gibson are roughly around the same in price, though the new Wholly Habanero could definitely stand to make its menu a combo menu at its prices. Pal Joey's also has a salad bar in case you want to make your own salad instead of buying from a set menu or a pre-made one
in E.E. Gibson. They only accept cash however, so save your cards for E.E. Gibson and Einstein's.
The campus also has its own fine restaurant, staffed by the school's culinary students in order to give them more experience in the culinary field. It requires formal attire and I believe reservations, and is kind of pricey I've heard, but is supposed to have pretty good food. The Culinary and Hospitality building also has a small cafe which sells foods made by the culinary students. I haven't tried them, but they definitely look delicious.
Lastly, it has many vending machines across the campus, including those that sell ramen and mac'n'cheese cups and assorted sandwiches, such as the double pork chop sandwich and Italian beef sandwiches. Microwaves are also located around these machines.