Interfacing FORTRAN with C

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I don't know about Ultrix, but as a general principle, never use
Fortran IO unless you begin with a Fortran Program. All systems
I have seen use the main entry point to initialise the runtime system,
including IO.
-- 
The maggot spawn of Ymir's flesh                                     -- s m ryan
whose lust of gold is trapping mesh,                            
have lost their hoard to gods and men,                          -- Andwari's Gem
now hid in river, mine, or fen.                                           -- 1/1