I have an existing application in C++ with a custom ArrayBase class that manages storage and access to a contiguously allocated region of memory. I have a separate ItrBase class that is used to access data in that ArrayBase. ArrayBase has a createItr() function that currently returns an ItrBase object. I need to extend ArrayBase to us...
template<typename T1, typename T2> class Bimap { public: class Data { private: template<typename T> Data& set(T); template<> Data& set<T1>(typename T1 v) { /*...*/ } }; }; That gives me the error: error: explicit specialization in non-namespace scope 'class Bimap<T1, T2>::Data' I understand what the error ...
when i try to remove an element: i go to secondMap which contains in second field a pointer to the first map, now when i try to erase it it gives me problems: multimap<SortKey,T> firstMap; multimap<SearchKey,pair<const SortKey,T>*> secondMap; template <class T,class SortKey, class SearchKey> T GarageDataBase<T,SortKey,SearchKey>::...
I'm trying to override operator < as the following : inside Node : bool operator <(const Node* other) { return *(this->GetData()) < *(other->GetData()); } inside vehicle : bool operator <(const Vehicle &other) { return this->GetKilometersLeft() < other.GetKilometersLeft(); } invoking the operator : while (index > 0 && m_he...
Apologies for the code dump: gameObject.cpp: #include "gameObject.h" class gameObject { private: int x; int y; public: gameObject() { x = 0; y = 0; } gameObject(int inx, int iny) { x = inx; y = iny; } ~gameObject() { // } int add() { retur...
I want to use glCurrentPaletteMatrixARB in Mac application. OpenGL library is imported GLEW library and GLUT and, glewInit() function calling was successful. glWeightPointerARB function is able to call, but my application crashed in glCurrentPaletteMatrixARB. Reason is function pointer value is null pointer error. Extension string is no...
We can have a local class defined inside a function but this class cannot be a template which is bit annoying and inconsistent. Is there any update on that in C++0x standard? ...
hello, guys, i am very new to c++. i have just wrote this class: class planet { public: float angularSpeed; float angle; }; here is a function trying to modify the angle of the object: void foo(planet* p) { p->angle = p->angle + p->angularSpeed; } planet* bar = new planet(); bar->angularSpeed=1; bar->angle=2; foo(bar); It seem t...
I'm having a little circular-dependency problem. It works fine, but it makes for ugly-seeming code. It's in the context of a Snake game. I have a class, Snake, which contains a vector of SnakeSegments, and manages their interaction (for instance moving and growing as a unit, rather than as separate entities). When a SnakeSegment collid...
I am trying to design a queue which could be simultaneously accessed by multiple read/write threads. I prefer using 2 mutexes, one apiece for read and write. Doing write is simple enough, lock the write mutex, append data, unlock and you are done. The issue is with read. If there's no data in the in queue I'd like my thread to wait til...
I have the following code: template<typename Parent, typename T, void (Parent::*Setter)(T), T (Parent::*Getter)()> struct Property { Parent& obj; Property(Parent& _obj) : obj(_obj) {} Property& operator=(T v) { (obj.*Setter)(v); return *this; } operator T() { return (obj.*Getter)(); } }; template<typename T1, typename T2> class Bim...
first of all i think its a crapy design , but im trying to prove a point. i want to count all the instances of derivers from my class, im trying to do it like so: .h file: #ifndef _Parant #define _Parant #include<map> class Parant { public: Parant(); virtual ~Parant(); static void PrintInstances(); private: static v...
Well, sorry if my english isn't very good, second, in c++ how i can make events?, is something that i can't find as much i searched, and i think that it could help me a lot to make me the things a little easier with the college. Thanks for your answers. ...
I have two arrays of chars, allocated as follows: unsigned char *arr1 = (unsigned char *)malloc((1024*1024) * sizeof(char)); unsigned char *arr2 = (unsigned char *)malloc((768*768) * sizeof(char)); I would like to copy arr2 into arr1, but preserve the row/column structure. This means that only the first 768 bytes of each of the fir...
Possible Duplicate: When to use virtual destructors? let's say i have an abstract class Animal class Animal { public: Animal(const std::string &name) : _name(name) { } virtual void Print() const = 0; virtual ~Animal() {} protected: std::string _name; }; and i have Dog and Cat that inherit this class....
Hi, I am trying to initialize a 2D array of structs in C++, but am getting an error. Can someone please tell me what am I doing wrong? I have rechecked the braces and they seem to be fine. My code: struct CornerRotationInfo { bool does_breed; int breed_slope; bool self_inversion; int self_slope; inline CornerRotationInfo(b...
Hi I'm designing an application platform and want to integrate Linux in particular for the KDE desktop only independent bookstores that if I use KDE and the QT libraries the look and feeling not like and I have all the power of the KDE libraries. The problem is, I want to be an application platform that includes the libraries to compile...
For example, c++ have cplusplus.com/reference which contain all of c++ standard library complete with definitions and more importantly examples, so I was wondering if there is such a website for python. I know that python is self documented, like i could use help(object) object.__doc__ dir(object) I know of doc.python.org/library w...
I have the following code: #include <iostream> #include <string> #include <unistd.h> using namespace std; int main() { // Variables string sDirectory; // Ask the user for a directory to move into cout << "Please enter a directory..." << endl; cin >> sDirectory; cin.get(); // Navigate to the directory spec...
Hello all, I'm have a code written in C++\MFC that is run as a Windows Service and a (normal) C++\MFC Windows process - now I wish to communicate between the two using named Mutex and Shared memory (File mapping). How is that possible ? ...