Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!fluke!ssc-vax!dmg
From: dmg@ssc-vax.UUCP (David Geary)
Newsgroups: comp.lang.c++
Subject: Help!
Keywords: constructors, C++ i/o, extern
Message-ID: <2774@ssc-vax.UUCP>
Date: 5 Jul 89 18:08:24 GMT
Organization: Boeing Aerospace Corp., Seattle WA
Lines: 74


  Here's something interesting:

First, the file works.cxx:

----------------------------------------------------------------------
#include "//ernie/user/geary/c++/include/stream.hxx"        // c++ i/o

class junk { public: junk() { puts("Constructing Junk"); } };

junk myjunk;

main() { }
----------------------------------------------------------------------

When I compile and run, I get:

$ works
Constructing Junk
$

(In other words, everything is ok).  However, watch this:

The file noworks.cxx:

----------------------------------------------------------------------
#include "//ernie/user/geary/c++/include/stream.hxx"        // c++ i/o

class junk { public: junk() { cout << "Constructing Link\n"; } };

junk myjunk;

main() { }
----------------------------------------------------------------------

When I compile and run, I get:

$ noworks
Segmentation Fault
$

(In other words, everything is NOT ok ;-).  The only difference
between the two is that I use puts() in works.cxx, and use
cout << in noworks.cxx.  How, watch this:

The file worksagain.cxx

----------------------------------------------------------------------
#include "//ernie/user/geary/c++/include/stream.hxx"        // c++ i/o

class junk { public: junk() { cout << "Constructing Link\n"; } };

main()
{
junk myjunk;
}
----------------------------------------------------------------------

When I compile and run, I get:

$ worksagain
Constructing Junk
$

So now, I can use cout << ... but I cannot have the object myjunk
external, it has to be in main().

  Can anybody provide an explanation as to why this is happening?

-- 
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~ David Geary, Boeing Aerospace, Seattle                 ~ 
~ "I wish I lived where it *only* rains 364 days a year" ~
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