| --- Log opened Wed Dec 10 00:00:59 2008 |
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| 10:36 | < AttillaUni> | Could I have a voice, need to paste a link. |
| 10:37 | < AttillaUni> | (Well paste the pastebin link for some code I have |
| 10:38 | < AttillaUni> | Otherwise try 83435 - Care to look at this gents? Whenever I compile it, it gives no warnings or errors, but when I run it, all it does is generate the output file but not actually output into it or anything, giving no printfs or anything that I can see. |
| 10:39 | < AttillaUni> | (It's in C, as hopefully stated in the link) |
| 10:43 | < AttillaUni> | (I don#'t think the long integers are necessary to be long but it was something I was trying to debug it) |
| 10:48 | < AttillaUni> | The gcc compiler i'm using doesn't seem to have helpful debugging options |
| 10:49 | | mode/#Code [+v AttillaUni] by TheWatcher |
| 10:50 | <+AttillaUni> | http://paste.ubuntu.com/83435/ |
| 10:50 | <@TheWatcher> | (also, with gcc, compile and link with -g -O0 then use gdb or ddd) |
| 10:52 | <@TheWatcher> | for (j=1;j==M;j++) shouldnt that be for (j=1;j<=M;j++) |
| 10:52 | <@TheWatcher> | ? |
| 10:53 | <@TheWatcher> | Similarly for the i=1;i==N;i++ |
| 10:53 | <@TheWatcher> | (also, why the 1-indexing in C?) |
| 10:53 | <+AttillaUni> | You might have a point. What do you mean on 1-indexing? |
| 10:54 | <@TheWatcher> | In C, the convention is generally to do for(j=0; j < M; ++j) rather than starting at 1 and looping while <= |
| 10:56 | <+AttillaUni> | Because this is a Random Walk algorithm and as such there is no zeroth step or zeroth iteration (j being the current iteration, i being the current step) |
| 10:56 | <+AttillaUni> | It's important more for the output's appearance, but eh. |
| 10:57 | <+AttillaUni> | Oof, okay that solved the problem with the not really working but now it's doing the random value of j thing again :( |
| 10:58 | <@TheWatcher> | Define random? |
| 10:58 | <+AttillaUni> | Basically it keeps outputting the "current iteration" point as some large probably random number |
| 10:58 | <+AttillaUni> | I got 888205418, 1419248454, 1942677093, 1392995888, 847707617 and more |
| 10:58 | <+AttillaUni> | When the iterations should just be 1 -> M |
| 10:59 | <+AttillaUni> | Hmm I think I see a problem |
| 11:00 | <@TheWatcher> | Also |
| 11:00 | <+AttillaUni> | The "current position" value appears to be the current iteration :S |
| 11:00 | <+AttillaUni> | (At least at the print on line 41) |
| 11:01 | <+AttillaUni> | brb, lecture starting |
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| 11:51 | <+AttillaUni> | Okay, back |
| 11:51 | <+AttillaUni> | You were saying something The_Watcher? |
| 11:52 | <@TheWatcher> | Just vaguely concerned about the repeated calls to srand(), unless there is a well-established need for it |
| 11:52 | <+AttillaUni> | Well I'm changing the seed with each call. |
| 11:53 | <@TheWatcher> | Yeah, but do you actually need to? |
| 11:54 | <@TheWatcher> | Repeated calls to srand() will actually reduce the quality of the random sequence (although, that said, if you want actual random you should be reading /dev/random as srand()/rand() are pretty lousy) |
| 11:54 | <+AttillaUni> | Since Time(NULL) is a function of time it will be identical with each call unless I put some silly time-delay mechanism in |
| 11:55 | <+AttillaUni> | (Or I manipulate it with incremented values) |
| 11:55 | <@TheWatcher> | Why reseed at all? |
| 11:56 | <+AttillaUni> | Because i'm silly, that's why. |
| 11:56 | <+AttillaUni> | Anyway i've changed that around, unfortunately j is still printing out as memory values from where it's pointing for some reason |
| 11:56 | <+AttillaUni> | At least that's what I assume are the weird large values |
| 11:57 | <@TheWatcher> | post your latest code, and give me some values to imput to replicate it? |
| 12:00 | <+AttillaUni> | http://paste.ubuntu.com/83464/ Here. Also values of 1000, 250, 2, and 1 (or 0 if you want to have lots of step-by-step data I guess but for that I tend to go for smaller numbers of steps and iterations) |
| 12:01 | <+AttillaUni> | brb |
| 12:07 | <@TheWatcher> | aaah, of course |
| 12:08 | <@TheWatcher> | yOr, maybe not. Hm. This is weird |
| 12:09 | | * TheWatcher facepalms |
| 12:11 | <@TheWatcher> | here's your problem: |
| 12:12 | <@TheWatcher> | float ....,ran,seed; |
| 12:12 | <@TheWatcher> | ran should be an int, not a float |
| 12:13 | <@TheWatcher> | otherwise you'll screw with the printf |
| 12:16 | <+AttillaUni> | back |
| 12:16 | <+AttillaUni> | Ah... |
| 12:18 | <+AttillaUni> | Cheers |
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| 21:41 | <@ToxicFrog> | Ok, Deluge is pretty awesome. |
| 22:06 | <@McMartin> | Deluge? |
| 22:09 | <@AnnoDomini> | "11 In da liek 6 hunderd year of Noah's lief, on teh sevententh dai ov teh second munth-on dat dai all teh spreengs ov teh grate deepz liek spewed teh waterz on teh urf and teh floodgatez ov teh heavenz wuz opend.12 An' teh wetnessez came to teh urf an' it was all wet." |
| 22:10 | <@McMartin> | I much prefer the bits of the Lolcat Bible that aren't simply packed with misspellings. |
| 22:10 | <@AnnoDomini> | Word. |
| 22:11 | <@McMartin> | (w00t to teh Ceilingcat & all his buds) |
| 22:23 | <@ToxicFrog> | McMartin: bittorrent client. Daemon backend does the actual work, has shell, GTK, and HTTP frontends. |
| 22:24 | <@AnnoDomini> | What's the daemon written in? C? |
| 22:26 | <@ToxicFrog> | Python. |
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| --- Log closed Thu Dec 11 00:00:10 2008 |