I am trying to create a game using Thrift, so that the clients are the players, and the server manages the boards, much like this. However, I cannot figure out how Facebook's Thrift server can "track" the user, i.e. when calling attack() on their service, I do not have to identify myself again. According to what the generated server stu...
I want to run a DOS command in my C++ program. The point is that I want my program stops while the DOS command is executed. I have used "System" API. My question is "Does 'system' make a new thread/process to run the DOS command in it or it just stops the program until the command is done?" If it creates a new process, how can I stop th...
So, I realize that const T& and T const& are identical and both mean a reference to a const T. In both cases, the reference is also constant (references cannot be reassigned, unlike pointers). I've observed, in my somewhat limited experience, that most C++ programmers use const T&, but I have come across a few people who use T const&. I ...
I'm trying to use Ogg/Vorbis with OpenAL to get sound in my game. Right now I'm simply trying to load a .ogg file and read its data, I'm not actually doing anything with it. I first tried using ov_open, however, the documentation said I should really be using ov_fopen on Windows. However, when I try to use that I get the following: 1>A...
I have a few years experience programming c++ and a little less then that using Qt. I built a data mining software using Qt and I want to make it available online. Unfortunately, I know close to nothing about web programming. Firstly, how easy or hard is this to do and what is the best way to go about it? Supposing I am looking to hire ...
I understand that the code below would result segmentation fault because at the cstr of A, B::SYMBOL was not initialized yet. But why? In reality, A is an object that serves as a map that maps the SYMBOLs of classes like B to their respective IDs. C holds this map(A) static-ly such that it can provide the mapping as a class function. ...
The MSDN says that using ReadDirectoryChangesW implies the calling process having the Backup and Restore privileges. Does this mean that only process launched under administrator account will work correctly? I've tried the following code, it fails to enable the required privileges when running as a restricted user. void enablePrivilege...
I'm trying to implement named pipes in C++, but either my reader isn't reading anything, or my writer isn't writing anything (or both). Here's my reader: int main() { HANDLE pipe = CreateFile(GetPipeName(), GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL); char data[1024]; DWORD numRead = 1; while (num...
Hello there. I have a Win32 C++ Application. There is the _tWinMain(...) Method with GetMessage(...) in a while loop at the end. Before GetMessage(...) I create the main window with HWND m_MainHwnd = CreateWindowExW(WS_EX_TOOLWINDOW | WS_EX_LAYERED, CAxWindow::GetWndClassName(), _TEXT("http://www.-website-.com"), WS_POPUP, 0, 0, 1024, ...
I am trying to generate a good random seed for a psudo-random number generator. I thought I'd get the expert's opinions. let me know if this is a bad way of doing it or if there are much better ways. #include <iostream> #include <cstdlib> #include <fstream> #include <ctime> unsigned int good_seed() { unsigned int random_seed, ran...
Hello This is not homework, I need this for my program :) I ask this question, because I searched for this in Google about 1 hour, and I don't find anything ready to run. I know that is trivial question, but if you will help me, you will make my day :) Question: How to copy text in string (from for example 8 letter to 12 letter)...
I would like to knwo if it is possible to create a CImageList with alpha blending transparency. Sample code that creates a CImageList with ugly transparency (no alpha blending) CGdiPlusBitmapResource m_pBitmap; m_pBitmap.Load(IDB_RIBBON_FILESMALL,_T("PNG"),AfxGetResourceHandle()); HBITMAP hBitmap; m_pBitmap.m_pBitmap->GetHBITMAP(RGB(0...
I have a GTK/C++ program that uses a ScrolledWindow. I keep adding data to the list within the scrolled window, and I want to keep focus on the newest item. But I also want to allow the user to scroll through the data to select an old item. Is there a way to do this? I've looked everywhere but can't find anything. ...
I've been using c++ for a while, and I'm familiar with normal try/catch. However, I now find myself on Windows, coding in VisualStudio for COM development. Several parts of the code use things like: TRY { ... do stuff } CATCH_ALL(e) { ... issue a warning } END_CATCH_ALL; What's the point of these macros? What benefit do the...
I'm trying to debug a C++ program compiled with GCC that freezes at startup. GCC mutex protects function's static local variables, and it appears that waiting to acquire such a lock is why it freezes. How this happens is rather confusing. First module A's static initialization occurs (there are __static_init functions GCC invokes that ar...
I am reluctant to say I can't figure this out, but I can't figure this out. I've googled and searched Stack Overflow, and come up empty. The abstract, and possibly overly vague form of the question is, how can I use the traits-pattern to instantiate member functions? [Update: I used the wrong term here. It should be "policies" rather ...
I've seen it used in programming (specifically in the C++ domain) and have no idea what it is. Presumably it is a design pattern, but I could be wrong. Can anyone give a good example of a thunk? ...
I'm having a slight problem with my SDL/Opengl code, specifically, when i try to do something on a mousebuttondown event, the program sends an sdl_quit event to the stack, closing my application. I know this because I can make the program work (sans the ability to quit out of it :| ) by checking for SDL_QUIT during my event loop, and ma...
Why does this fail, it's supposed to be simple and work ? fisier.seekg(0, ios::end); long lungime = fisier.tellg(); This returns a larger value than that of the file resulting in a wrong char *continut = new char[lungime]; Any idea what the problem could be ? I also tried counting to the end of the file one char at a time, that r...
Is there a significant penalty in using the more user-friendly valarray over built-in arrays? Do you know of some benchmarks? ...