Fortran to C 3.2 by Torten Poulin - Converts
Fortran 77 source code in files with names
ending in `.f' or `.F' to C (or C++) source
files in the current directory, with `.c'
substituted for the final `.f' or `.F'.  If
no Fortran files are named, f2c reads
Fortran from standard input and writes C on
standard output.  Source Code.