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From: tak@aerospace.aero.org (Michael L. Takayama)
Newsgroups: comp.sys.sgi
Subject: Re: Array boundary checking & Fortran <> C translators
Message-ID: <66244@aerospace.AERO.ORG>
Date: 5 Feb 90 17:38:04 GMT
References: <90Jan25.135818est.57895@ugw.utcs.utoronto.ca> <65973@aerospace.AERO.ORG> <49566@sgi.sgi.com>
Reply-To: tak@aero.UUCP (Michael L. Takayama)
Organization: The Aerospace Corporation, El Segundo, CA
Lines: 32

Thanks for the reminder... guess that it is time to re-read the ol'
K&R!

Verification, please - automatic conversion of float to double occurs
in the parameter declaration of a function in C.  When calling a
Fortran routine from C, this conversion does *not* occur, i.e. a float
passed from C to Fortran should be correctly interpreted as a REAL?

Example:

subtestc()
{
    float a;
   
    a = 1234.5678;
    subtestf_(&a);
}

      SUBROUTINE SUBTESTF(A)
      REAL A

      WRITE(*,*) A

      RETURN
      END


Thanks again (wish you guys were on the Hotline!) -

Michael L. Takayama
Computer-Aided Engineering Department
The Aerospace Corporation