kchance@ukulele> f90 tutorial.f90
kchance@ukulele> a.out 
     enter filespec of input file.
temp.inp
     enter filespec of output file.
temp.out
FORTRAN STOP



kchance@ukulele> f90 -o tutorial.x tutorial.f90
kchance@ukulele> tutorial.x
     enter filespec of input file.
temp.inp
     enter filespec of output file.
temp.out
FORTRAN STOP