DPlot

If you use the g77 compiler, what version is it and where did you get it? This is semi-important because it is, well, free. I'm having a bit of trouble with it and the additional functions I've added to the example program. In particular atan2 seems to not work correctly and/or crashes. I tried replacing it with my own function that uses atan, but it doesn't work either!

I tried the successor gfortran, but am apparently using the wrong compiler options. It doesn't recognize -fcase-preserve, which leads to an unresolved external error with the DPLOTLIB functions, whose names mix case. Any suggestions?