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C coding challenge
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PostPosted: Fri Aug 07, 2009 7:54 pm    Post subject: Reply to topic Reply with quote

almost

Code: Show/Hide
..\main.c:6: warning: use of conditional expressions as lvalues is deprecated
..\main.c:6: error: invalid operands to binary ^
..\main.c:6: error: invalid operands to binary ^
..\main.c:6: error: invalid lvalue in assignment

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JoWie
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PostPosted: Sat Aug 08, 2009 3:12 am    Post subject: Reply to topic Reply with quote

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void swap(int* a, int* b)
{
   a != b && (*a ^= (*b ^= (*a ^= *b)));
}


The only problem with this code, incase you haven't noticed, is that there aren't enough Sequence points. So it has a wrong answer on some compilers
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PostPosted: Sat Aug 08, 2009 11:48 am    Post subject: Reply to topic Reply with quote

good enough
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PostPosted: Wed Aug 12, 2009 1:42 pm    Post subject: Reply to topic Reply with quote

Zero semicolons

void swap(int *a, int *b)
{
#define fi i##f
fi (*a != *b) fi (*b = (*b ^ *a)) fi (*a = (*b ^ *a)) fi (*b = (*b ^ *a)) {}
}
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PostPosted: Wed Aug 12, 2009 8:49 pm    Post subject: Reply to topic Reply with quote

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PostPosted: Thu Aug 13, 2009 3:14 am    Post subject: Reply to topic Reply with quote

yarly
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