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Path: utzoo!utgpu!water!watmath!watvlsi!peregier
From: peregier@watvlsi.UUCP
Newsgroups: comp.lang.fortran
Subject: Re: "Interesting" error interpretation by f77.
Message-ID: <3731@watvlsi.waterloo.edu>
Date: Thu, 17-Sep-87 14:02:09 EDT
Article-I.D.: watvlsi.3731
Posted: Thu Sep 17 14:02:09 1987
Date-Received: Sat, 19-Sep-87 05:33:11 EDT
References: <5117@jade.BERKELEY.EDU>
Reply-To: peregier@watvlsi.waterloo.edu (Phil Regier)
Organization: U. of Waterloo, Ontario
Lines: 22
Keywords: FORTRAN parsing, error interpretation.

In article <5117@jade.BERKELEY.EDU> lagache@violet.berkeley.edu (Edouard Lagache) writes:
>      PROGRAM PRACT
>      REAL NUM1,NUM2,SUM
>      WRITE(*,*) 'Enter two numbers to be added to each other:'
>      READ(*,*) NUM1, NUM2
>    SUM = NUM1 + NUM2
>      WRITE(*,*)
>      WRITE(*,*) 'The sum of the two numbers is : ',SUM
>      STOP
>      END
>Error on line 4 of practice.f: syntax error
>Warning on line 9 of practice.f: local variable num2 never used
>Warning on line 9 of practice.f: local variable read never used

   The compiler is doing exactly what it is told.  The fifth line
has an entry in column 6 and therefore is a continuation line.
The compiler treats the fourth and fifth lines as
      READ(*,*) NUM1, NUM2M = NUM1 + NUM2
which is a syntax error.  I'm not going to try to guess exactly
how the compiler parses this line, but when it does you get
your error messages.  Move line 5 to the right by two spaces
and it works.