Post Citadel Graduation?

hi all, im a junior in high school and i want to go to the citadel. ever since i can remember i have wanted to be in the military. ive don't my research for the school and i have a 3.9 GPA and play football, baseball and wrestle. i would like to be a field officer in the marine corps. my question is, if i got to the citadel, will i have to graduate as a private, or would i graduate as a 2nd lieutenant? also, wold i have to go to OCS after graduation?