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Re: about main must return "int"
- From: David Odin <David at dindinx dot org>
- To: Amy Lin <alin at itsc dot uah dot edu>
- Cc: gcc-help at gcc dot gnu dot org
- Date: Mon, 7 Jul 2003 22:12:11 +0200
- Subject: Re: about main must return "int"
- References: <3F09CFAD.firstname.lastname@example.org>
On Mon, Jul 07, 2003 at 02:53:17PM -0500, Amy Lin wrote:
> Hi, I am new with this list, and I need your help.
> After installing Redhat 8.0 which has gcc 3.2, I ran into a problem when
> recompiling a project. with c++. It errors out on "main" must return
> "int". All my old codes with "void" main. I used c++ from egcs-1.1-2
> (redhat 7.3) and it was no problem there. My question is: Is this a bug
> of gcc 3.2, or this is a permanent change and I will have to change my
In C and C++, the main() function _has_ to return an int, which will
be used by the shell which run the program. However, with C++, the
return statement isn't mandatory anymore, and a main() function with a
missing return statement will silently return 0.