You'll need to link in a bunch of the F2C routines, so I provided a set below. The first link below includes the original Fortran subroutine, the C translation, and some example files used to call the routine. The second link includes all of the F2C source necessary to compile the program (along with other source that isn't necessary). I've run the software extensively on PCs and it seems okay. It also seems alright on a Sun running SunOS 4.3.1_U1. I don't guarantee anything beyond this (frankly, I don't even guarantee that it'll work anywhere, even on my own machines!)
STEPIT and associated code.
designed by Alan Cooke.
©1998 Alan Cooke, all rights reserved.