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Subject: Re: scanf: strange behavior?
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Date: Fri, 03 Sep 2004 05:03:28 GMT
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Brian Inglis wrote:
> DJ Delorie <dj AT delorie DOT com> wrote:
> 
... snip ...
> 
> "7.19.6.2#16 The fscanf function returns the value of the macro EOF if
> an input failure occurs before any conversion. Otherwise, the function
> returns the number of input items assigned, which can be fewer than
> provided for, or even zero, in the event of an early matching
> failure."
> 
> >The appropriate test cases are thus, for "%d %d":
> 
> IMHO according to info and standard, results should be:
> >    ""
> input failure - terminator - returns EOF
> >    "x"
> matching failure - returns 0
> >    "5"
> input failure - terminator - returns 1
> >    "5 x"
> matching failure - returns 1
> >    "5 5"
> success - returns 2
> >    "5 5 x"
> success - returns 2 - " " scanned and pushed back - "x" unscanned

I agree with your interpretation.  AFAICS DJGPP 2.03 complies.

-- 
 "A man who is right every time is not likely to do very much."
                           -- Francis Crick, co-discover of DNA
 "There is nothing more amazing than stupidity in action."
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