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From: =?ISO-8859-1?Q?Hans-Bernhard_Br=F6ker?= <HBBroeker AT t-online DOT de>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: _CRT0_FLAG_NULLOK
Date: Mon, 29 Jul 2013 22:56:40 +0200
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On 29.07.2013 22:45, Georg Potthast wrote:
> I got my program to work fine in real mode DOS now when I set this flag:
>
> int _crt0_startup_flags = _CRT0_FLAG_NULLOK | _CRT0_FLAG_FILL_SBRK_MEMORY;
>
> Without this line above it crashes when executing "atoi" in these lines:
>
> const char* testchar = NULL;
> int testint = atoi(testchar);

... as it should.  You haven't fixed your program; you've just brushed a 
blatant bug under the carpet by turning off the techniques that would 
have detected it.

Where did you gather the impression that NULL was a valid input for atoi()?