Processing an FWEB file

gustav@blanc:../src 11:19:34 !721 $ ftangle example.web
This is FTANGLE [UNIX version 1.61 (September 23, 1998)]. 
(No example.aux file.)
Reading example.web... *1 *2
Writing the output file(s):  (example.f90)
Done.
[FTANGLE:  No errors were found.]
gustav@blanc:../src 11:19:40 !722 $ f90 -o example example.f90
gustav@blanc:../src 11:19:54 !723 $ ./example
 a = 1.23450005
 STOP 0
gustav@blanc:../src 11:19:34 !724 $ fweave example.web
This is FWEAVE [UNIX version 1.61 (September 23, 1998)]. 
(No example.aux file.)
Reading example.web... *1 *2
Writing example.tex... *1 *2
Writing INDEX.tex...MODULES.tex...
Done.
[FWEAVE:  No errors were found.]
gustav@blanc:../src 11:20:03 !725 $ latex example.tex
This is TeX, Version 3.14159 (C version 6.1)
(example.tex
LaTeX2e <1996/12/01> patch level 1

 ... voluminous LaTeX2e output ...

LaTeX Warning: Label(s) may have changed. Rerun to get cross-references right.

 )
Output written on example.dvi (4 pages, 2460 bytes).
Transcript written on example.log.
gustav@blanc:../src 11:20:10 !726 $ latex example.tex

 ... ditto ...

gustav@blanc:../src 11:20:16 !727 $

The results:

• You get a plain Fortran code on example.f90, not very pretty though, which can be compiled and run as usual.
• You get a L^ATEX input file on example.tex, which can be formatted and filtered to produce PostScript. The resulting document has:
  • a title page with a table of content
  • beautifully formatted code with annotations
  • automatically generated index of variables and functions
  • table of FWEB modules (not the same as Fortran modules)