Probably a dumb / simple question, but I have not been able to find an answer. I have no clue how adding libraries works with CodeBlocks c++. I downloaded the .zip file from http://eigen.tuxfamily.org/index.php?title=Main_Page and extracted the files into my directory. How can I use this library now in my project?
It's a template library. You can put it anywhere as long as it's in the path (accessible). Just include the proper headers and it should work. No need to link anything, everything is in the headers.