From: "Tony O'Bryan" <aho450s AT nic DOT smsu DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Trouble with C++ and interrupt
Date: Thu, 11 Dec 1997 20:56:41 -0600
Organization: Southwest Missouri State University
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Thomas Larsson wrote:

> void main(void)
> {
>         cout << "HI!";
> }

I just thought I'd get to one of these before John does -smile-.  void
is not a valid return type for main().  main() must always return an
integer: int main(void) for example.

> 
> I wrote "gcc test.cpp -o test.exe"
> What could be wrong?

Have you downloaded the files needed to compile C++ code?  Assuming you
have, gcc doesn't automatically link the C++ libraries.  The simplest
solution is to compile with gxx rather than gcc.  gxx automatically
links the correct C++ library.

> I have also tried to compile some examples for multiple keypresses. They
> all include a keyword called "interrupt" but DJGPP doesn't find it
> anywhere. Should I replace it or should I use another keyword?

I think (but am not certain) that interrupt is a non-standard extension
that some compiler makers include to facilitate writing interrupt
handlers.
 
> Thanks for your help, I have looked through the FAQ but I can't find any
> answers to the problems there...

Section 8.7 of the FAQ discusses the C++ question.