Re: ObjC BOOL and boolean c expressions
Re: ObjC BOOL and boolean c expressions
- Subject: Re: ObjC BOOL and boolean c expressions
- From: Charles Steinman <email@hidden>
- Date: Fri, 31 Aug 2007 11:28:21 -0700 (PDT)
--- John Stiles <email@hidden> wrote:
> I *think* that the C spec doesn't specify the result
> of a boolean
> expression other than "zero means false, nonzero
> means true." So from
> a "compliance with the spec" standpoint, the first
> version might
> return different results from the second version.
I don't know about earlier versions, but the C99 spec
guarantees that they will return 1 if true and 0 if
not. The logic for determining whether something is
true or false still boils down to "zero means false,
nonzero means true," obviously, but the operators
themselves can only return 1 or 0.
Cheers,
Chuck
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