16 May
2005
16 May
'05
4:40 p.m.
On Mon, 16 May 2005, Dave Dunfield wrote:
There's one extra local variable (char *t) which is a pointer: hardly
expensive by any metric. If you prefer, move the i initializer inside the
for loop construct. Same difference.
I trump thee
collectively:
void print_arg(int *aryp, size_t n)
{
char *t="%u,";
int i=0;
for (;(i==n-1 ? t="%u" : i<n);) printf(t, *aryp + i++);
putchar('\n');
}
A little ugly (the compiler complains about the type mismatch in the unary
expression) but otherwise it works without caveats (that I know of ;)
I suspect someone might bum it down further...no more precious time to
expend on this useless pursuit ;)
I'm a little confused about the definition of "trump" when used in
this case:
- You have returned to an excess of local variables, and the
extra assignment - although you have used a (more expensive)
conditional to defer it until the last iteration. - You have returned to TWO conditionals, although you
have
creatively moved them both into the for statement.
The loop uses the same number of conditionals as any other example so far
(including yours, which doesn't work ;)
- In the last iteration of the loop you are stuffing
the address
value of the constant string "%u" into the for conditional
(granted in any reasonable implementation this will be non-zero
and will evaluate to TRUE, however it seems a bit odd and not
completely necessary to the logic of the program).
Your analysis somewhat (misses the point|is non-sequitur). The unary
construct is the entire reason this works.
- You are reading only the first element of the array,
although
you are adding an increasing offset to it for each iteration of
the loop.
Perhaps this is an issue of precedence and compiler implementation, but
the way it works (at least under gcc) is as I suspected, which is that
counter i gets incremented after first being added to aryp. So it in fact
iterates the entire array from start to end.
This really is getting silly.
Yes, but at least we're not talking about cars or guns.
So... Seen any good old computers lately?
Thousands.
How about them Altairs - ain't they something?
Over-rated.
When I was a gaffer, we had to carry our card decks
uphill both ways to the card punch!
You had card punches? We had to cut holes into ours with exacto knives.
--
Sellam Ismail Vintage Computer Festival
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