2,898 Posted Topics
 | > but i never say anyone about my awesome and fabulous source is. ;) You are reaping the benefits of a community of people who find that it is important to share knowledge and help others to improve, and are generous enough to take the time to do so. Then … |
| | > is it like vacancies which comes ? like in a big big companies vacancies comes around , is that like this ? Not really like that, since moderation is mostly voluntary. But yeah, it's basically that the number of mods becomes too few. Some mods may stop being active … |
 | I guess you can get books on Linux networking and system administation. Like: For a free reference on system administration: [Linux Network Administrator's Guide](http://oreilly.com/openbook/linag2/book/index.html) (free online) For a more all-around guide to Red Hat (one of the most popular distro for servers): "A Practical Guide to Red Hat Linux" - …  |
| | In the code you posted, the only error I can spot is this bit: return temp->value; //Returns the value of the top node. delete temp; //Deletes the top node in the stack. You can't have a statement after the return statement. That statement will never execute. You need to do: … |
 | @AD: That's a screen shot of msys, the MinGW replacement from cmd.exe (command prompt). It is a unix-like bash shell for Windows, like cygwin. That's the standard way to run MinGW/GCC in command-line (unless you want to suffer and use the command prompt). @Vastor: The problem I see on the … |
 | > while const int may not even be given storage because the compiler may just treat it as if it were a macro by inserting its value wherever it is used. No, it can't be treated as a macro (substituting for a literal constant), because the const-variable must have an … |
| | Let's have a look at the C++ Standard, shall we: Section 17.6.4.3.2/1: > Certain sets of names and function signatures are always reserved to the implementation: > — Each name that contains a double underscore _ _ or begins with an underscore followed by an uppercase letter (2.12) is reserved … |
| | The parameter `pGTPrice` is a pointer-to-member-function. And to call the member function it points too, you need to supply an object on which to call it. Within the "GetStars" function, you should use the "this" pointer to address the object you want to call the member function on, you can … |
 | The only real difference between a `struct` and a `class` is in the default inheritance and access rights. Given a base-class `B`, you could write: class C : B { // inherits B privately, by default, same as ': private B {'. void foo(); // private member function, same as … |
| | As AD said, there are [many alternatives](http://en.wikipedia.org/wiki/List_of_platform-independent_GUI_libraries). Doing Win32 API directly is probably the worst option. In a similar style as doing Win32 API directly, you can use [SDL](http://www.libsdl.org/), which is at least cross-platform and a bit easier, but still very basic and low-level like Win32 API. On the Microsoft … |
| | > Why can't we do this in C++? The compiler says it's ambiguous or that the parameter x shadows a member of such and such class. > Is there any tricks to doing this? The `this` pointer exists in C++ too (Java copied this feature from C++). You can access … |
 | Most programming languages and some scripting/interpreted languages have the capability of calling C functions in a DLL or .so file (i.e., a shared library). This is what usually serves as the glue between any two language, and is most often the basis for other frameworks geared towards inter-language interfaces (like … |
 | > Main part of my project is to capture and parse all incoming and outgoing network > traffic on the fly. Do you think that merits a performance concern? Not until you have tested your program and realize that your code is not able to keep up with the data … |
| | That forum is called "Software Development" -> "Computer Science". That is where you post language-agnostic problems, such as discussions on algorithms and approaches to solve a problem. |
 | Re: Please help me! What about a while loop? Something like this: boolean shouldContinue = true; while(shouldContinue) { shouldContinue = false; input = JOptionPane.showInputDialog("Enter a number between 1 and 10 " + "and I will convert it to a Roman numeral: "); num = Integer.parseInt(input); if (num == 1) JOptionPane.showMessageDialog(null, "I"); else if (num …  |
| | The seeding really only needs to occur once in the entire program (at the start). You don't need and shouldn't re-seed in the constructor of that object. Just call the seed once at the start of the main() function, and that's it. Try it, it will work as you want … |
 | > I am expecting an answer from an kind of a expert who have read multiple books . The main problem with this is that you don't become an expert by reading books after books on C++ (I think I have maybe read, partially, about 3-4 books on C++, and …  |
| | If you want to compute complex numbers, then you should use the `<complex>` header and use the `std::complex<double>` type to represent your numbers. However, if you want to avoid it (why?), then you can simply check the value inside the square-root to see if it is negative (thus, leading to …  |
 | > xcode is for MAC, not MS-Windows. I believe the OP is asking about a cross-compilation environment, such that you can develop code for the iOS under a MS-Windows-based development environment. Personally, I know nothing about doing this, but I just wanted to clarify. |
 | You have a circular dependency problem. "Container.h" includes "Student_info.h" which includes "Container.h" which includes "Student_info.h" ... In terms of your declarations, you shouldn't need that. In other words, you shouldn't need to include "Container.h" in the "Student_info.h" file. Remove that include statement and your problem should be solved.  |
| | > Just share that what have you all done in your universities/scholl time which made you to come to this level of programming. For programming, the University / School part was mostly irrelevant, I only ever took a few programming courses and they were all compulsory courses (as part of … |
| | Re: machine learning It is basically what the lay-person would call Artificial Intelligence. This comes out of the general realization that the key aspect of an intelligent system is its ability to learn, i.e., to adapt and restructure its computational resources to gear them towards solving problems it commonly encounters (is trained to … |
| | MyOtherClass myClass; The above declares an *object* of class `MyOtherClass`. myClass.MyFunction(); The above calls a member function called `MyFunction()` on the *object* called `myClass`. MyOtherClass *myClass; The above declares a *pointer* to an object of class `MyOtherClass`. In other words, the pointer can store the address in memory of an … |
| | |
| | To your original question: > Is it possible to 1) count 2) extract types in/from a typelist using variadic templates. The easiest thing is to put the list of template arguments into a tuple type and then extract the count and elements. As so: template <typename... Args> struct info_on_types { … |
| | > Do i have to write two totally different codes for different enviroments. If you stick to only standard libraries (I mean, the [C++ standard libraries](http://www.cplusplus.com/reference/)) and to standard C++, then all you have to do is recompile it for both environments. That's easier said than done for non-trivial codes, … |
| | > Hard coded time = 125ms > PreCalced Array time = 130ms > PreCalced Vector time = 624ms > Repetitive Calc time = 5444ms... First observation, from your code, my first thought was: the compiler will optimize away the entire calculation part of the hard-coded loop. And that's gonna happen … |
| | Like [Wireshark](http://www.wireshark.org/). It's an open-source project, so feel free to check out its source code and learn from it.  |
 | It's probably borrowed from the chain-smoking poet or whiskey-drinking writer stereotype. Btw, I'm a programmer, a smoker, and a whiskey drinker, so I guess I qualify.  |
| | Re: Bit of weirdness cin (and other istreams) is a bit complicated to grasp at first, but here's the basic information you need to know: cin is a buffer of data that accumulates whatever the user inputs, which it can then feed by various "extraction" methods. So, when the user writes something and then …  |
| | Most GUI tools will hide away the main() function, because you don't have to temper with it, shouldn't need to, and probably shouldn't, period. But if you want to know what it looks like or what it does, out of curiosity, I can tell you. Typically, a GUI application is … |
 | You have to use Windows' partition manager and locate the linux partitions (they should appear as having unknown format, and there should be at least two of them (root and swap) and possibly a third one (/home)). Then, you "delete" those partitions which will create some "free" space on the …  |
 | This sounds like a good idea. I'm not sure if there is something similar already. Just a thought. This sounds very similar to YouTube's "suggestions" column, but for website links (URLs) instead of videos. What I mean is that this list of suggested "related" videos is most likely created from …  |
 | 1) Return-value-optimization (RVO): The situation you describe is one of the basic applications of return-value-optimization. This is a classic optimization, permitted by C++, and implemented by all decent C++ compilers that I know of. You can check the assembly listings generated by your compiler for the given code to see … |
| | Please define what you mean by "report generator". Or do you mean documentation generator, like [doxygen](http://www.stack.nl/~dimitri/doxygen/)? |
 | It appears you just don't have gcc installed (code-blocks or geany or kdevelop will not install the compiler, they are only IDEs). Run this command: $ sudo apt-get install build-essential  |
 | Statically linking the libraries into the executable is not a problem at all. However, you have to be careful about a few things. First of all, if you have an external library that provides a DLL and an import library (.lib on Microsoft compilers, and .a on others) then you … |
| | > Does anyone know what his formal education is? Does it really matter? Whatever he studied, it's probably obsolete today. His accomplishments are stupendous and his technical knowledge of C++ and programming in general can be matched by only a handful of people in the world. This completely dwarfs whatever … |
 | You would probably be better off using an off-the-shelf library for that, like the [Open Dynamics Engine (ODE)](http://www.ode.org/). It's a simple but pretty solid engine for doing computer game physics realism (not for real simulations, of course). The basic idea with this is that you control your objects (characters, vehicles, … |
| | Re: Linux anyone? Sure, there is always room. Welcome! For Linux-specific questions, there is a "Hardware & Software" -> "Linux and Unix" forum. Glad to hear you managed to unplug from the MS/Apple "Matrix". |
| | In C++, you need to do the cast explicitly: static unsigned char row[4]; static unsigned short *p1 = reinterpret_cast<unsigned short *>(&row[0]); static unsigned short *p2 = reinterpret_cast<unsigned short *>(&row[2]); static unsigned long *long_random = reinterpret_cast<unsigned long *>(&row[0]); That should solve your problem. |
 | |
| | The problem is that your function overload: template<typename T> void MemDeSerialize(T*& Destination, unsigned char* &Source, size_t Size){...} takes a *reference* to a pointer. And because you call it with `&Destination[I]`, which creates a pointer to the Ith element, that pointer is a temporary object, and it cannot be bound to … |
| | The demand for good programmers is high, and is not likely to diminish anytime soon. The saying goes: "Good programmers don't starve." For example, I'm subscribed to some C++ developer groups on LinkedIn, and there are between 10-20 new job postings everyday, just for C++ programmers. Overall, salaries seem comparable … |
| | The "delay" function is called `Sleep()` and you can get it through the `<windows.h>` header. The Sleep function sleeps for the specified number of milliseconds. However, do not expect good precision, thread-switching frequency in Windows is notoriously slow and unresponsive, don't expect precision higher than about 10ms to 30ms. The …  |
| | Re: Linux Desktop I personally prefer KDE. It is nice, polished and highly customizable (based on Qt). And the default configuration is very Windows-like, so it will be easy to adopt if that is where you are coming from. You can get KDE-packaged Linux distributions mainly as [Kubuntu](http://www.kubuntu.org/) (based on Ubuntu), [Fedora KDE …  |
 | Of course, my C++-brain cringes at the sight of all the blantant inefficiencies in the code, but if I adopt the Python mindset, then your code snippet is quite nice! Lots of demonstrations of Python-kung-fu in there. A few comments: I think you are not protective enough of your invariants, … |
| | Re: Reps not added For the first thread, in Community Feedback, I believe it is normal as posts under the Community Center forums do not receive rep-points, that's just the policy. As for the second thread, I don't know why it didn't cause rep-points to the member. I have noticed something similar if you … |
 | I assume there is also an untold gentlemen's agreement that you don't vote for your own snippet if you have one in there. |
| | First of all, you should not use template specialization of function templates. [Here](http://www.gotw.ca/publications/mill17.htm) is an explanation why. You must use overloading instead. So, your "Model" Serialize function should just be a straight overload: void Serialize(unsigned char* &Destination, const Model& M) { Serialize(Destination, M.SX); Serialize(Destination, M.SY); Serialize(Destination, M.Stride); Serialize(Destination, M.ID); Serialize(Destination, … |
The End.