Subject:
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Programming Brain Teaser
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Newsgroups:
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lugnet.off-topic.geek
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Date:
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Thu, 7 Sep 2000 01:00:57 GMT
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Viewed:
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140 times
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Hey Y'all:
Someone posed the following teaser to me, and I admit that it has stumped me
completely. It has even stumped my programmer buddies (which creates doubt in
my mind that there IS actually a solution to the puzzle).
The question was posed thusly:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
What line of code written either in C, C++, or Perl will compile written
forward as well as backwards? The following was submitted as an example of
the FORM of the answer, while not itself being the answer:
print "abcdefghijklmnopqrstuvwxyz";
;"zyxwvutsrqponmlkjihgfedcba" tnirp
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
And again, it was asserted that both statements would compile.
-- Richard (scratching his head)
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Message has 4 Replies:
 | | Re: Programming Brain Teaser
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| (...) it doesn't have to actually produce anything, right? try this: perl -e 'print ,"lalal", tnirp' e- lrep :) I seem to recall some JAPH's code that would actually do things and would still qualify... but I can't find it yet... :) Dan (24 years ago, 7-Sep-00, to lugnet.off-topic.geek)
| | | Re: Programming Brain Teaser
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| (...) Does the code need to compile in all of those, or just some of them? It's really easy in perl. :) Does it have to compile by itself, or can it be part of a larger program? The former is more difficult in C/C++... Also, what qualifies as a (...) (24 years ago, 7-Sep-00, to lugnet.off-topic.geek)
| | | Re: Programming Brain Teaser
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| (...) #include <stdio.h> #include <stdlib.h> #include <time.h> void rof(void) {}; void main(){ int C; C = 0 // line below ; for (C;C;C) rof; // Ok so its lame } // Should be valid in perl too, but I am not sure. Just an off the cuff answer. DaveG (24 years ago, 7-Sep-00, to lugnet.off-topic.geek)
| | | Re: Programming Brain Teaser
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| (...) Well the obvious answer is ";", but that's a bit too simple. I can't think of anything else that doesn't involve several variable and/or function definitions elsewhere. (24 years ago, 7-Sep-00, to lugnet.off-topic.geek)
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