Recent questions tagged C++

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c++ - Unable to call derived class function using base class pointers

I want to call a derived class function that isn't defined in the base class using base class pointers. but ... could get around this? Thanks, See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Whole screen capture and render in DirectX [PERFORMANCE]

I need some way to get screen data and pass them to DX9 surface/texture in my aplication and render it at at ... write, don't vote down. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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258 views

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c++ - 2D meshes in QT3D

It seems to me that Qt3D cannot render 2D meshes well. To see what I mean open the shadow map QML example ... anything. Am I missing something? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to convert standard IP address format string to hex and long?

Does anyone know how to get the IP address in decimal or hex from standard IP address format string ("xxx. ... result is 1412741344). Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to select the version of the VC 2008 DLLs the application should be linked to?

I'm using Visual Studio 2008 SP1 for C++. When compiling, Visual Studio needs to choose against which version of ... is not present in v21022. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - why for-loop isn't a compile time expression and extended constexpr allows for-loop in a constexpr function

I wrote code like this #include <iostream> using namespace std; constexpr int getsum(int to){ int s = 0; for( ... where did I make a mistake. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Detection of rectangular bright area in a Image using OpenCv

I have previously asked a question Marking an interest point in an image using c++. I used the same ... efficient ways are available.. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Double buffer common controls

Is there a way to double-buffer the common controls? Currently when they resize they flicker. A lot..... ... ://billy-oneal.com/Lobfuscator.exe See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Code duplication between typedefs and explicit instantiations

tree.h template<typename Functor, char Operator> class binary_operation : public node { // ... unimportant details ... header file as usual? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Code alignment dramatically affects performance

Today I have found sample code which slowed down by 50%, after adding some unrelated code. ... 00007FF7750B1290 986us 00007FF7750B12A0 1500us See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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286 views

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c++ - Linking against library in release and .exe in debug crashes in Visual studio

I'm using Visual C++ 2008 SP1. I have an app that is compiled in debug mode, but links against a ... 'Common Language Runtime Support' either. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Double from long bits

I have an unsigned long long (or uint64_t) value and want to convert it to a double. The double shall have the ... for a way to do this. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Could operator overloading have worked without references?

According to Bjarne Stroustrup, references were introduced into C++ to support operator overloading: References were introduced ... x *); }; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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280 views

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c++ - Script for separating implementation from headers in a .h file

Sometimes, when working with small classes, it's a pain in the ass to separate the implementation in a .cpp file ... a nicely filled .cpp file? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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304 views

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c++ - SetWindowsHookEx for Mac OS X?

Windows hooks allows you to poke inside other processes and sometimes alter their behaviors. Is there such thing for Mac OS X? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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662 views

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c++ - Read until a string delimiter in boost::asio::streambuf

I would like to use the very convenient Boost async_read_until to read a message until I get the delimiter. I like ... to read until I get ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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291 views

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c++ - Boost serialization with pointers and non-default constructor

How would you serialize/deserialize this class using boost::serialization? #include <vector> struct Foo { struct Bar { ... :endl; return 0; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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395 views

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c++ - How to modify key values in std::map container

Given std::map<int,std::string> myMap; fillMyMapWithStuff(myMap); // modify key values - I need to add a ... the new key and old value? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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311 views

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c++ - I get this error: "glibc detected"

I just wrote a piece of CPP code and I compiled it using G++ in ubuntu. When I run my code everything is fine ... free , I'm just using vector! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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392 views

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c++ - Minimal Windowless OpenGL Context Initialization

How can I initialize a windowless OpenGL context with the minimal amount of code? I've read here that you can ... it doesn't explain how? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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432 views

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c++ - What is the purpose of SAL (Source Annotation Language) and what is the difference between SAL 1 and 2?

As asked in the title: What is the purpose of SAL (Source Annotation Language) and what is the difference between ... in advance for your time! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to debug a DLL file in Delphi

I am a developer working on Visual C++, but in my project there are some Delphi components. I need to ... and then start debugging in Delphi? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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351 views

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c++ - How could I create a custom windows message?

Our project is running on Windows CE 6.0 and is written in C++ . We have some problems with the code , and ... to do what I just wrote ? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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264 views

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c++ - What are the rules for function pointers and member function pointers to Standard functions?

What are the existing rules for taking function pointers or member function pointers to Standard functions? For example, ... std::string::size? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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814 views

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c++ - #error gl.h included before glew.h

So I'm trying to move my OpenGL code from Main() into a specific class that will handle the 3D graphics only ... that I'm not mentioning here). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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234 views

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c++ - How to get VBO working

I tried to use this tutorial http://nehe.gamedev.net/data/lessons/lesson.asp?lesson=45 I load it in my ... i cant find anything that works. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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267 views

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c++ - Store pointers to member function in the map

I'd like to map string to an instance member functions, and store each mapping in the map. What is the clean way ... here in the c++-faq-lite See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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581 views

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c++ - Inner Class access to Outer Class members

I'm very confused about this topic, basically I've this code: template <typename T> class SListArray { public: ... of the Outer Class. Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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