Re: return types with conditional

Andre Poenitz <poenitz@[EMAIL PROTECTED]
> writes:
> Allan Adler <ara@[EMAIL PROTECTED]
> wrote:
>> Suppose the program is:
>> main() { fn1(); if (debug == 0) fn2();}
>> where fn2() returns int and fn1() returns int*. Since main is
implicitly
>> being declared as returning int, is there a possible problem here?
>
> There is no problem. In both cases (debug == 0, and debug != 0)
> main() will return 0 independently of what fn1() and possibly fn2()
> returned. This implicit 'return 0;'is, btw, a special rule for main().
> You can't rely on that in general.
[...]

And it's a new rule in C99.  In pre-C99 implementations, falling off
the end of main() returns an undefined status to the environment.
(IMHO depending on it even in C99 is poor style.)

-- 
Keith Thompson (The_Other_Keith) <kst-u@[EMAIL PROTECTED]
>
Nokia
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"
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