Obscure C code (was Re: Excessive optimization)
spectre at floodgap.com
Thu Dec 2 17:07:40 CST 2010
> > Yes, C DOES permit an empty condition clause. Valid, and often used when
> > a programmer prefers to use the "for" rather than "while" keyword.
> C permits a lot of interesting things. I've occasionally interviewed
> programmers claiming to be C experts, and amongst my questions for them
> are whether the following is valid C code, what will happen when it is
> executed, and why:
> #include <stdio.h>
> int main ()
> int i;
> for (i = 0; i < 14; i++)
> putchar (i ["Hello, world!\n"]);
> So far none of the self-styled C experts I've interviewed were able to
> answer all three questions correctly.
Okay, I compiled this and was shocked at the result (I didn't think it
would work, honestly). So what are the answers to your questions above?
I'm genuinely interested.
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Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com
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