Compatibility Testing Program

Ok, I am doing a charity project at my school involving a compatibility test. Everyone fills out a sheet, then if they want the print out they pay money to get it. Stupid, probably but I still have a few questions.

I am thinking of using a 2 dimensional array answers(firstperson, secondperson) where the result would be their compatibility percent. I would have the program fiqure out the compatibilities then later print out results. Would it be better to have it fiqure out one persons results then just print them, and so on?
i.e.
Jim Sally Bob Jane
Jim N/A 75 10 100
Sally 75 N/A 100 95
Bob 10 100 N/A 25
Jane 100 95 25 N/A

or
Jim array
Jim N/A
Sally 75
Bob 10
Jane 100

There will probably be about 500-1000 respondents so that would make a very large array either way.

Hi
Why not create a datatable with the respective columns and populate it, it will be much more easier to maintain since you have lots of respondents

I will just be using it at one time with no storage of the compatibility array. I am really just going for ease of use in code.