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Recent questions tagged C++
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c++ - Find n-th set of a powerset
I'm trying to find the n-th set in a powerset. By n-th I mean that the powerset is generated in the ... as the "incomplete" solution I posted. See Question&Answers more detail:os...
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c++ - Understanding Y Combinator through generic lambdas
While building a small lambda-based metaprogramming library, I had the necessity of using recursion in a C++14 ... use of a Y Combinator? See Question&Answers more detail:os...
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c++ - Compiling Quantlib via SWIG for C#
Anyone have any experience using SWIG? I am currently researching QuantLib and saw that C# code can be generated ... is a better one provided. See Question&Answers more detail:os...
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c++ - Function template specialization importance and necessity
I read C++ Primer, and it says function template specialization is an advanced topic, but I am totally lost. ... ? What's the underlying logic? See Question&Answers more detail:os...
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122
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c++ - How to compile Qt as static
I am currently writing code in Qt. How to compile the code statically? From Qt document I came to know the ... as a stand alone program? See Question&Answers more detail:os...
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191
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c++ - Using boost::iostreams::tee_device?
Can someone help me? I am trying to do something like the following: #include <boost/iostreams/tee.hpp> #include < ... I am doing wrong. Thanks See Question&Answers more detail:os...
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131
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c++ - Does the evil cast get trumped by the evil compiler?
This is not academic code or a hypothetical quesiton. The original problem was converting code from HP11 to HP1123 ... (24114Ah) Thank you all! See Question&Answers more detail:os...
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Oct 17, 2021
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134
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c++ - What are the different character sets used for?
The C++ standard mentions multiple different character sets. In particular, it mentions the following character ... string literals represented? See Question&Answers more detail:os...
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Oct 17, 2021
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c++ - Absence of typeof operator in C++03?
I'm just wondering how boost have implemented BOOST_TYPEOF (in C++03) which seems to be a very useful tool. ... compilers (and humans as well)! See Question&Answers more detail:os...
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c++ - How to analyze program running time
I am trying to optimize a c++ program's performance and reduce its run time. However, I am having trouble ... to know where that time goes? See Question&Answers more detail:os...
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283
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c++ - Enumerate COM object (IDispatch) methods using ATL?
Using ATL (VS2008) how can I enumerate the available methods available on a given IDispatch interface (IDispatch*)? I ... <>). Is this possible? See Question&Answers more detail:os...
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c++ - Why uninitialized global variable is weak symbol?
It seems uninitialized global variable is treated as weak symbol in Gcc. What is the reason behind this? See Question&Answers more detail:os...
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Oct 17, 2021
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150
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c++ - multithreading on dual core machine?
I have a dual core processor and according to the explanation I'm able to use only 2 threads but actually ... Can anyone explain that behavior? See Question&Answers more detail:os...
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Oct 17, 2021
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192
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c++ - What happens to an STL iterator after erasing it in VS, UNIX/Linux?
Please consider the following scenario: map(T,S*) & GetMap(); //Forward decleration map(T, S*) T2pS = GetMap(); ... to in UNIX/Linux? Thanks... See Question&Answers more detail:os...
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Oct 17, 2021
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240
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c++ - CoCreateInstance returning E_NOINTERFACE even though interface is found
I have a COM class CMyCOMServer implementing IMyInterface in one application, both with correct GUIDs. CMyCOMServer:: ... makes no difference. See Question&Answers more detail:os...
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Oct 17, 2021
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315
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c++ - Compiler support for upcoming C++0x
Is there a compiler that has good support for the new C++0x? I use GCC but unfortunately the current version ... support for the new features. See Question&Answers more detail:os...
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Oct 17, 2021
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267
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c++ - Programmatically getting per-process disk io statistics on Windows?
I would like to display a list of processes (Windows, C++) and how much they are reading and writing from ... anyone point me in the direction? See Question&Answers more detail:os...
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Oct 17, 2021
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283
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c++ - Convert Byte Array into Bitset
I have a byte array generated by a random number generator. I want to put this into the STL bitset. ... have a more efficient solution? See Question&Answers more detail:os...
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Oct 17, 2021
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155
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c++ - how to traverse a boost::multi_array
I have been looking into the boost::multi_array library in search of an iterator that allows you to traverse ... loop that repeats 3x4x2 times See Question&Answers more detail:os...
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Oct 17, 2021
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c++ - how const keyword works in c
I want to know about const internals in c and c++ . How compiler imposes constantness ? Can some one help me please. See Question&Answers more detail:os...
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Oct 17, 2021
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c++
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358
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c++ - Conversion from void* to the pointer of the base class
I have some hierarchy: base, derived classes and some structure storing user data as void*. That void can ... pointers? Thanks in advance. See Question&Answers more detail:os...
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Oct 17, 2021
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c++
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306
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c++ - Initializing map of maps with initializer list in VS 2013
I'm trying to initialize map of maps using C++11. My compiler is VS 2013 Express. unordered_map<EnumType, ... How to do it better? See Question&Answers more detail:os...
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Oct 17, 2021
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c++
0
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515
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c++ - How to implement a video widget in Qt that builds upon GStreamer?
I want to use Qt to create a simple GUI application that can play a local video file. I could use Phonon which ... on the Mac version of Qt. See Question&Answers more detail:os...
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249
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c++ - Rotating a 2D pixel array by 90 degrees
I have an array of pixel data for an image. The image I am getting is already rotated to 270 degrees. So I am ... can I do to have it rotated? See Question&Answers more detail:os...
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Oct 17, 2021
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c++
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178
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answer
c++ - Sorting Sets using std::sort
I would like to know if we can sort a pre created set. When I first create the set s_p2, I sort using ... i sort the elements in the container. See Question&Answers more detail:os...
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Oct 17, 2021
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c++
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188
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c++ - Advantages of using arrays instead of std::vector?
I'm currently seeing a lot of questions which are tagged C++ and are about handling arrays. There even are questions ... std::vector in C++? See Question&Answers more detail:os...
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c++
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321
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c++ - Assigning a reference by dereferencing a NULL pointer
int& fun() { int * temp = NULL; return *temp; } In the above method, I am trying to do the ... do the dereferencing in case of reference? See Question&Answers more detail:os...
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c++ - Multiple-readers, single-writer locks in Boost
I'm trying to implement the following code in a multithreading scenario: Get shared access to mutex Read data ... other way to achieve this? See Question&Answers more detail:os...
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Oct 17, 2021
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