Hi, I'm wondering if any of you know of a c++ associative map container type which I can perform multiple key lookups on. The map needs to have constant time lookups but I don't care if it's ordered or unordered. It just needs to be fast. For example, I want to store a bunch of std::vector objects in a map with an integer and a void* as...
Lets say I have: a static library project called "LIB" a application project called "LIBAPP" a application project called "APP" a application project called "APPTEST" When i add "LIB" to LIBAPP Project Dependencies, Visual Studio automatically links "LIBAPP" against LIB. But when i add APP to APPTEST Project Dependencies, it doesnt....
I have some old linux code I'm trying to port to Windows. When I first built it as a straight native DLL, I go no issues with this piece of code, but when I tried making it a mixed-mode C++/CLI DLL, I got an unresolved external object error on this: extern "C" char** environ; Why would this work for native and not CLI? Any idea how t...
Hi All, I have a template class that is: template <class identifier,class registeredObject> class FxPairRegistry : public FxRegistry<pair<identifier,registeredObject> > { public: registeredObject GetEntry(identifier, FxBool assertValue = true); void RegisterInOrder(const pair<identifier,registeredObject> &ob); typedef typename ...
I'm getting a 'strcpy' error and warning for the following lines: _tcscpy(strCommandLine,_T("MyProgram.exe /param1")); _tcscpy(strApplicationName,_T("MyProgram.exe")); Not sure why I'm getting a 'strcpy' error or warning since I'm not using 'strcpy'. The only lines related to this is: LPCTSTR strApplicationName; LPTSTR strCommandLin...
with char i get this error: .\main.cpp(6) : error C2015: too many characters in constant ...
Hey ppl, I came across something weird today, and I was wondering if any of you here could explain what's happening... Here's a sample: #include <iostream> #include <cassert> using namespace std; #define REQUIRE_STRING(s) assert(s != 0) #define REQUIRE_STRING_LEN(s, n) assert(s != 0 || n == 0) class String { public: ...
Does anyone know how to change the subnet mask and the DHCP enabled flag on Windows XP / Vista / 7 from a C++ program? The Windows API has a GetAdaptersInfo() routine which will give you that information, but I need the counterpart SetAdaptersInfo() which doesn't seem to exist. I've looked all over MSDN and the web and don't see how to...
Same for CMap, CList, and pretty much everything that uses templates (I guess). I find it a bit hard to understand when to use which. It's true that for classes and such, the <class, class&> form is usually what you want, but for basic types like int, float, etc., which form is preferred? ...
Basically I am trying to give the enter key the same functionality as the return key has when editing a cell in a qtablewidget. If editing a cell and enter is pressed I want it to jump out of editing that cell just like return does. It feels like I've literally tried everything. I've even tried passing a return press event to qcoreapplic...
I can't get it to work correctly. #include <windows.h> int main() { DWORD i = 6521; BYTE first = i >> 32; BYTE second = i >> 24; BYTE third = i >> 16; BYTE fourth = i >> 8; i = (((DWORD)fourth) << 24) | (((DWORD)third) << 16) | (((DWORD)second) << 8) | first; } ...
Do class destructors have names in the pedantic sense according to the Standard? Recall that constructors explicitly do not have names: 12.1.1 : Constructors do not have names. A special declarator syntax using an optional sequence of function-specifiers (7.1.2) followed by the constructor’s class name followed by a param...
What is the best way to use QExplicitlySharedPointer and inherited classes. I would like when the BaseClass exits on it's own to have a my d pointer be QExplicitlySharedPointer<BaseClassPrivate> and when I have a Derived class on top of this base class I'd like to have d be a QExplicitlySharedPointer<DerivedClassPrivate>. I tried makin...
Hi, I've got a huge graph with typed edge (i.e. edge with a type property). Say typedef adjacency_list<vecS, vecS, vertex_prop, edge_prop> Graph; The "type" of the edge is a member of edge_prop and has a value in {A,B,C,D}, I'd like to run the breadth first search algorithm considering only edges of type A or B. How would you do ...
QFile msnLogFile(item->data(Qt::UserRole).toString()); QDataStream logDataStream; if(msnLogFile.exists()){ msnLogFile.open(QIODevice::ReadOnly); logDataStream.setDevice(&msnLogFile); QByteArray logBlock; logDataStream >> logBlock; } This code doesnt work. The QByte that results is empty. Same...
I want to write a C++ application with Qt, but build a prototype first using Python and then gradually replace the Python code with C++. Is this the right approach, and what tools (bindings, binding generators, IDE) should I use? Ideally, everything should be available in the Ubuntu repositories so I wouldn't have to worry about incompa...
I'm making some mistake with my iterators, but I can't see it yet. I have a Boost MultiIndex container, HostContainer hmap, whose elements are boost::shared_ptr to members of class Host. All the indices work on member functions of class Host. The third index is by Host::getHousehold(), where the household member variable is an int. Be...
double s_deviation(double data[],int cnt, double mean) { int i; double sum= 0; double sdeviation; double x; //x = mean(billy,a_size); for(i=0; i<cnt; i++) { sum += ((data[i]) - (mean)); } sdeviation = sqrt(sum/((double)cnt)); return sdeviation; } Wh...
how to create a registry key without using system()/.bat/.reg in c/c++?? ...
Hello, I am seeking to improve my C++ skills by writing a sample software renderer. It takes objects consisting of points in a 3d space and maps them to a 2d viewport and draws circles of varying size for each point in view. Which is better: class World{ vector<ObjectBaseClass> object_list; public: void generate(){ objec...