Recent questions tagged C++

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c++ - How would you go about designing a function for a perfect hash?

The domain of interest is string matching. Assume I have a structure like this. typedef struct { char *name, int ... a function 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++ - std::getline does not work inside a for-loop

I'm trying to collect user's input in a string variable that accepts whitespaces for a specified amount of time. ... return 0; } Any idea? 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 generate a constexpr version string from three integers (or perhaps a git/SVN commit/rev. string)?

Say I have constexpr const std::uint8_t major = 1; constexpr const std::uint8_t minor = 10; constexpr const ... 'm satisfied with the result. 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++ - DirectX SDK vs Windows SDK: which one to use?

I have an old game engine (sort of) based on DirectX 10, which I've been planning to move to DX 11 ... comparisons between the two? Many 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++ - Has anyone found the need to declare the return parameter of a copy assignment operator const?

The copy assignment operator has the usual signature: my_class & operator = (my_class const & rhs); Does the following ... other, but not both. 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 do function prototypes include parameter names when they're not required?

I always thought that a function prototype must contain the parameters of the function and their names. However, ... signature of the function? 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++ - Sticky custom stream manipulator

How do I implement my own custom stream manipulator so that it is sticky. For example, I want to convert integers to ... 4: 4 decimal of 4: 4 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++ - Qt/QML qmlRegisterType vs. setContextProperty (difference)

In Qt/QML application (this code usually resides in main.cpp of QtCreator project), what is the difference ... uePeopleModel", uePeopleModel); ? 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++ - psd file format

I am attempting to find documentation of the psd file format so I can read in a .psd and then save out the ... be down voted if this happens.) 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 do I implement dragging a window using its client area?

I have a Win32 HWND and I'd like to allow the user to hold control and the left mouse button to drag the ... change the position of the window? See Question&Answers more detail:os...

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

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342 views

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c++ - Why wasn't a double curly braces syntax preferred for constructors taking a std::initializer_list

Uniform initialization is an important and useful C++11 feature. However, you can't just use {} everywhere since: ... break worries me a lot. 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++ - Does every object of virtual class have a pointer to vtable?

Does every object of virtual class have a pointer to vtable? Or only the object of base class with virtual ... or data section of process? 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 would you list the available functions etc contained within a compiled library?

How do I determine whether a function exists within a library, or list out the functions in a compiled library? 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 can I get EnumWindows to list all windows?

I'm assuming, what I'm asking should actually be the default, but I'm experiencing some behavior I don't understand ... > What am I doing wrong? See Question&Answers more detail:os...

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

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204 views

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c++ - Copy Constructor and default constructor

Do we have to explicitly define a default constructor when we define a copy constructor for a class?? Please give ... with the concept..... See Question&Answers more detail:os...

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

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370 views

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c++ - Android NDK with Google Test

I'm trying to use GoogleTest on Android Studio. According to what I understood, the latest version of NDK has the ... where should I call it? See Question&Answers more detail:os...

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

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336 views

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c++ - Setting timeout to recv function

I read from socket using recv function. I have problem when no data available for reading. My programm just ... return after some timout? See Question&Answers more detail:os...

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

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349 views

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c++ - What is the difference between accessor and mutator methods?

How are accessors and mutators different? An example and explanation would be great. 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++ - Implementing a compile-time "static-if" logic for different string types in a container

I'd like to write a function template that operates on a container of strings, for example a std::vector. I' ... iterate using a range-for loop. 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++ - OpenCV Unresolved External Symbols - Other Libraries Needed?

I'm trying to use OpenCV 2.3.1 for a video capture and processing app. I downloaded the ... (grfmt_png.obj) : error LNK2019: unresolved external symbol _png_destroy_read_...

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

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131 views

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c++ - How do you add external libraries for compilation in VC++?

I've worked with a couple of Visual C++ compilers (VC97, VC2005, VC2008) and I haven't really found a clearcut ... . How does one go about 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++ - Compiling boost with zlib

I'm compiling boost with bjam under Windows 7 (64bit-should be irrelevant) D:developmentoostoost_1_44libsiostreamsuild> ... m doing wrong? See Question&Answers more detail:os...

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

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193 views

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c++ - Is there a dereference_iterator in the STL?

I was wondering if there is an iterator in the STL that dereferences the object pointed before returning it. This could be ... 2 3" 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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216 views

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c++ - What is the practical use of protected inheritance?

Public inheritance is easy. A : public B means every A is a B. In most programming language, like vb. ... conscience) for actual productive use? 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 force using local shared libraries over system libraries?

How can I force using a local library over the system library in linux? I linked my executable explicitly to ... in my project/lib directory. See Question&Answers more detail:os...

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

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328 views

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c++ - Linkage of symbols within anonymous namespace within a regular namespace

In C++, putting a function or a variable in an anonymous namespace makes its linkage internal, i. e. the same ... still internal linkage? } } } See Question&Answers more detail:os...

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

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153 views

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c++ - When should compiler generate move constructor?

I use VS11 and use following: class ContextWrapper { public: ContextWrapper() { } //it should be defaulted I ... factors that influence 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++ - Adding button to QTableview

I have created one table by using QTableview and QAbstractTableModel . In one of the cells, I want to add one ... any way to achieve 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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