EPTThe Big Programming Thread - Page 311
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Thread Rules 1. This is not a "do my homework for me" thread. If you have specific questions, ask, but don't post an assignment or homework problem and expect an exact solution. 2. No recruiting for your cockamamie projects (you won't replace facebook with 3 dudes you found on the internet and $20) 3. If you can't articulate why a language is bad, don't start slinging shit about it. Just remember that nothing is worse than making CSS IE6 compatible. 4. Use [code] tags to format code blocks. | ||
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CecilSunkure
United States2829 Posts
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Azerbaijan
United States660 Posts
I have 4 structure arrays of the same type and I want to throw these 4 arrays into another array so I can loop through them in a function all at once. This is what I have: typedef struct I know I need a 2d array and I know I can declare it like this: myType all_arrays[4][5]; I was hoping I could do this: all_arrays[0] = type_array1; But that obviously doesn't work. So do I need a function that will place the individual array elements into the 2d array one array at a time? Would that function take one array as an argument and would I just call it for each array? Or could this function accept all four arrays as individual arguments? If that is the case would it be easier to just make the function I originally needed take all four arrays as arguments in the same way? I don't really know what I'm doing :/ | ||
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Blisse
Canada3710 Posts
Something like that? There may be some silly C memory tricks to get it working like you have there but I would prefer not. | ||
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Nobu
Spain550 Posts
On June 10 2013 16:48 Azerbaijan wrote: C question. I have 4 structure arrays of the same type and I want to throw these 4 arrays into another array so I can loop through them in a function all at once. This is what I have: + Show Spoiler + typedef struct I know I need a 2d array and I know I can declare it like this: myType all_arrays[4][5]; I was hoping I could do this: all_arrays[0] = type_array1; But that obviously doesn't work. So do I need a function that will place the individual array elements into the 2d array one array at a time? Would that function take one array as an argument and would I just call it for each array? Or could this function accept all four arrays as individual arguments? If that is the case would it be easier to just make the function I originally needed take all four arrays as arguments in the same way? I don't really know what I'm doing :/ Not really experienced in C and it's been a while but, can't you do something like this?
Or you want to avoid pointers? | ||
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nepeta
1872 Posts
On June 09 2013 06:03 nepeta wrote: Sorry for the wait, only got around to it just now, and I'm sorry to inform everyone that I couldn't get it to work  Thanks for all the input, really appreciated, it's probably just me.Also got troubles with borders again, at least 'again' didn't pop up until I put more content on a page than one screen could hold. I officially suck at webdesign ^^ Going to rewrite once more. I cannot be that stupid that I can't get a bloody basic web page to work ^^ In case anyone is curious: I did it! It's a bloody awful hack with backgrounds and ungodly positioning with paddings and margins, but it is functional and I have decided to be content with that. Criticism always welcome of course  http://nepeta.host56.com/index2.php Many thanks everyone! | ||
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Azerbaijan
United States660 Posts
On June 10 2013 17:08 Blisse wrote:
Something like that? There may be some silly C memory tricks to get it working like you have there but I would prefer not. That makes a ton of sense but the type_arrays are not all the same size in the actual code so I don't think it would work. On June 10 2013 18:52 Nobu wrote: Not really experienced in C and it's been a while but, can't you do something like this? myType* all_arrays[4]; all_arrays[0]=type_array1; all_arrays[1]=type_array2; all_arrays[2]=type_array3; all_arrays[3]=type_array4; Or you want to avoid pointers? I'm still figuring pointers out. I will try this and if it works ill try to figure out why  EDIT: Didn't work :/ | ||
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teumas
Sweden280 Posts
On June 11 2013 01:43 Azerbaijan wrote: I'm still figuring pointers out. I will try this and if it works ill try to figure out why EDIT: Didn't work :/ The code by Nobu should work, afterwards you can access the structs like this: all_arrays[0][2]. Just keep in mind that since you now only have a pointer to each of the starting elements of the separate arrays, you have to remember how many elements each contains. | ||
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Azerbaijan
United States660 Posts
Thanks everyone | ||
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WindWolf
Sweden11767 Posts
Is there any advantages of randomizing out values instead of start from 0 and count upwards (Which is what I planned in my C++ project before I discovered that Boost had an UUID library)? | ||
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phar
United States1080 Posts
What are you using it for? | ||
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Craton
United States17284 Posts
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pyro19
6575 Posts
I'm currently learning C# , SQL and ADO.net...Is there anything more I could be learning? | ||
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Craton
United States17284 Posts
Database creation and management is usually done by DBAs, which in a sufficiently large organization would never even see code that's accessing it. Certainly the DBAs at my work have never seen any of the code we've written. If you just want .NET things that touch databases then you can add ASP.NET and VB.NET. | ||
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pyro19
6575 Posts
On June 12 2013 14:18 Craton wrote: Database management and .NET are more or less separate things. ADO.NET basically provides the facilities for connecting to and interacting with databases, but there really isn't much/any database management involved. Database creation and management is usually done by DBAs, which in a sufficiently large organization would never even see code that's accessing it. Certainly the DBAs at my work have never seen any of the code we've written. If you just want .NET things that touch databases then you can add ASP.NET and VB.NET. Thanks for the answer. And yeah I do know they are kinda separate stuff..I'm actually learning to build a website and Building databases and connecting them. Stuff I already know right now HTML ASP VBScript C Javascript Java (not too much tho) Guess I'm trying to learn a bit about every aspect of web development and stuff while being a master at None I'm so confused with my Life @_@ | ||
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phar
United States1080 Posts
On June 12 2013 14:04 Craton wrote: Don't mistake database sequences for ordering. In Oracle, and probably in SQL Server, sequences only guarantee uniqueness and nothing else. Yea I don't think anyone is concerned with ordering here. We can't be sure because don't know what the guy's actual use case is, but he didn't mention ordering. | ||
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WindWolf
Sweden11767 Posts
On June 12 2013 13:58 phar wrote: That depends entirely on the context. If you have no centralized way of enforcing uniqueness of the ids for whatever you're using, then properly random uuids can be useful. If you do have a centralized way of enforcing uniqueness, then counting upwards is totally fine (you'd typically call this a sequence in the context of a database). What are you using it for? As a summer project, I'm writing a tower defense game in C++. And since I planned to use features from Boost anyway and saw that it had an UUID library, so I thought why not use it since I'm planning on adding effects that requires some kind of UUID. But since the main purpose of the project is to learn how to make a tower defense game (programmer art all the way), it is not the end of the world if the UUID's isn't 100% unique all the time. I'm currently using boost::uuids:: random_generator()() as my mean of generating UUID's. Should that be sufficient for my game? | ||
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phar
United States1080 Posts
(From http://www.boost.org/doc/libs/1_46_1/libs/uuid/uuid.html#Random Generator) Design notes The document, http://www.itu.int/ITU-T/studygroups/com17/oid/X.667-E.pdf, was used to design and implement the boost::uuids::uuid struct. The boost::uuids::basic_random_generator class' default constructor seeds the random number generator with a SHA-1 hash of a number of different values including std::time(0), std::clock(), uninitialized data, value return from new unsigned int, etc.. Using libraries is often a good choice | ||
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Tobberoth
Sweden6375 Posts
On June 12 2013 14:15 pyro19 wrote: What are the Required languages that I should know for Database management and creation if working on .net platform. I'm currently learning C# , SQL and ADO.net...Is there anything more I could be learning? Don't really understand what you mean here. I mean, for just database management, SQL will be more than enough assuming you'll be working with an SQL database. ADO.NET is just the part of ASP.NET handling databases, it's not really something you study by itself, more like learning how to use databases with ASP.NET, in which case LINQ to SQL, Entity Framework etc might be more interesting than "ADO.NET" so to speak. And if you know Linq to SQL or such ways to work with the database, there's really nothing in C# outside of that which concerns databases. ADO.NET is just the backbone of the ways you interact with databases from the .NET framework. I guess what I'm saying is that it's really all up to learning SQL, then learning how to best work with databases from the language at hand. Since you seem to work a lot with C#/ASP.NET, I would definitely recommend Linq to SQL (Entity Framework is "better", but it's more complex so unless you're doing bigger projects, I would think staying with Linq to SQL is nicer, they are similar enough to learn the other later). | ||
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WindWolf
Sweden11767 Posts
On June 12 2013 14:55 phar wrote: Using libraries is often a good choice Indeed, that why I'll be using lots of Boost-code on the back-end side of things | ||
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Wobulator
United States15 Posts
I’ve been creating a chess AI. I’ve already created earlier versions, so I’m familiar with the programming required, but I have some specific questions about coding. The GUI is written in c#, which calls c++ DLLs to do the real thinking. Both are written by me in visual studio 2010 Express. 1) My board representations make heavy use of bitwise operators. Are these optimized and fast in a managed language? (Specifically Visual c++) 2) How does one debug a DLL? I saw something about attaching a debugger to the DLL. I’m not quite sure how this would work, and the internet says this can’t be done in Express edition anyways. Because I'm not a computer scientist/engineer and just program for fun, I've always used the easiest programming tools, so I sometimes end up learning things backwards. Thanks for the help. | ||
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