Re: f77 bug: comparing logicals

Article View: net.lang.f77

Article #357

#357

From: Peter Montgomery
Date: Wed, 07 May 1986 01:58

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In article <464@cubsvax.UUCP> peters@cubsvax.UUCP (Peter S. Shenkin) writes:
>The following program, compiled with f77, prints "f" for all three
>comparisons;  under VMS, using dec fortran,  the three results are
>"T", "F" and "T", as one would expect.
>
>	write(6,*)'.true. .eq. .true. :', .true. .eq. .true.
>	write(6,*)'.true. .eq. .false. :', .true. .eq. .false.
>	write(6,*)'.false. .eq. .false. :', .false. .eq. .false.
>	end
>
FORTRAN 77 does not permit the .EQ. operator on logical operands.  It
behaves properly under f77 if the operators are changed from .EQ. to
.EQV..
-- 
			Peter Montgomery

	{aero,allegra,bmcg,burdvax,hplabs,
	 ihnp4,psivax,randvax,sdcsvax,trwrb}!sdcrdcf!pmontgom

Don't blame me for the crowded freeways - I don't drive.

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From: pmontgom@sdcrdcf.UUCP (Peter Montgomery)
Newsgroups: net.lang.f77
Subject: Re: f77 bug:  comparing logicals
Message-ID: <2788@sdcrdcf.UUCP>
Date: Tue, 6-May-86 21:58:21 EDT
Article-I.D.: sdcrdcf.2788
Posted: Tue May  6 21:58:21 1986
Date-Received: Sat, 10-May-86 14:00:36 EDT
References: <464@cubsvax.UUCP>
Reply-To: pmontgom@sdcrdcf.UUCP (Peter Montgomery)
Organization: System Development Corporation R&D, Santa Monica
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