Xref: utzoo comp.lang.c:6836 comp.lang.fortran:370
Path: utzoo!utgpu!water!watmath!clyde!rutgers!ames!oliveb!sun!dgh!dgh
From: dgh%dgh@Sun.COM (David Hough)
Newsgroups: comp.lang.c,comp.lang.fortran
Subject: implicit declarations
Message-ID: <40376@sun.uucp>
Date: 28 Jan 88 22:26:19 GMT
Sender: news@sun.uucp
Lines: 26

If it's good enough for {C, Fortran} it's good enough for {Fortran, C}!

I always compile Fortran code I write with the -u option which on Suns
is equivalent to IMPLICIT UNDEFINED A-Z in each subprogram.   
That effectively eliminates implicit definitions.
-u probably works the same way on all f77 derivatives.

I sure wish C worked the -u way - no implicit definitions by default.  
How tired I get of bug reports that things like this don't work:

main()
{
double d ;

d = sqrt(1.0);
printf(" %e \n",d);
}

mostly coming from programmers who are proud of knowing nothing about
Fortran.


David Hough

ARPA: dhough@sun.com
UUCP: {ucbvax,decvax,allegra,decwrl,cbosgd,ihnp4,seismo}!sun!dhough