[Greg Marra]

It seems then that what you need to do is look up how to import data from a text file in C. Perhaps some Googling is in order?

Once you have those variables loaded, the actual algebraic formula they are asking for should be very easy to perform. Then it's a matter of looking up how to write the data back out into a file.

And of course, do you want to do this one by one for each player, or do you want to load it all at once, calculate it all at once, and write it all back out at once?