Re: Subroutine bug with 4.2 BSD F77.

Article View: net.lang.f77

Article #385

#385

From: Glenn A. Zazulia
Date: Mon, 16 Jun 1986 20:04

40 lines
1964 bytes

In article <3174@sjuvax.UUCP> version B 2.10.2 9/18/84; site emory.UUCP version B 2.10.2 9/5/84; site sjuvax.UUCP emory!akgua!akguc!mtune!mtuxo!houxm!mhuxt!mhuxr!ulysses!allegra!princeton!astrovax!sjuvax!bbanerje bbanerje@sjuvax.UUCP (B. Banerjee) writes:
>Description:
>	
>	User defined functions always return a value of 0 (including
>	logical functions).
>
>Repeat-By:
>
>	Compile and execute the following program.
>============================================================
>	integer i
>	i = 1
>	print *, bug(i)
>	stop
>	end
>
>
>	integer function bug(i)
>	integer i
>
>	bug = 2
>	return
>	end
>
>Fix:
>	Hopefully fixed in 4.3 BSD.

There is no bug here!  You forgot to declare your function 'bug' to be
of type integer in MAIN.  Without the declaration, the function 'bug'
will pass back an integer value, but be interpreted as real in MAIN
(implicitly typed as such).  Remember that the default type of a function,
like all variables, whose name begins with any letter other than 'i' - 'n'
is real, unless otherwise declared.

-- 
Glenn Zazulia

Emory University         |   {akgua,sb1,gatech,decvax}!emory!glenn    USENET
Dept of Math and CS      |   glenn@emory                              CSNET
Atlanta, Ga 30322        |   glenn.emory@csnet-relay                  ARPANET

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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: arc1-ca.pugleaf.net!utzoo!linus!philabs!cmcl2!seismo!lll-crg!lll-lcc!qantel!ihnp4!houxm!whuxl!whuxlm!akgua!emory!glenn
From: glenn@emory.UUCP (Glenn A. Zazulia)
Newsgroups: net.lang.f77,net.bugs.4bsd
Subject: Re: Subroutine bug with 4.2 BSD F77.
Message-ID: <1651@emory.UUCP>
Date: Mon, 16-Jun-86 16:04:33 EDT
Article-I.D.: emory.1651
Posted: Mon Jun 16 16:04:33 1986
Date-Received: Tue, 24-Jun-86 03:47:51 EDT
References: <3174@sjuvax.UUCP>
Reply-To: glenn@emory.UUCP (Glenn A. Zazulia)
Distribution: net
Organization: Math & Computer Science, Emory University, Atlanta
Lines: 40

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