From: vincent.trouill...@modulonet.fr
[...]
>
>> ISO C99, section 6.4.4.4, p3:
>> the question-mark ?, [..] is representable according to the following table
>> of escape
>> sequences: question mark? \?
>
> Interesting. I wonder why the standard deeemd it necessary to provide
> an escape sequence for the question mark ?
As other have mentioned, it's to prevent the substitution of trigraphs.
Trigraphs are a way to express characters that either do not appear is the
source character set, or are handled poorly by the development environment. If
trigraphs are enabled, then
puts("Trigraphs??!");
will output "Trigraphs|" (IIRC). To prevent this, you can use
puts("Trigraphs?\?!");
Regards,
-=Dave
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