Recent questions tagged C++

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c++ - gets() function is not available in Visual studio 2015 community

I have faced a compiler error(c3861) in my newly installed Visual studio community 2015 IDE: I just want ... correctly withgets() function. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - "enum class" emulation or solid alternative for MSVC 10.0

I'm looking for a hacky kind of solution to the following problem: GCC 4.4+ accepts the following c++0x ... at least the same syntax. Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - decltype, result_of, or typeof?

I have: class A { public: B toCPD() const; And: template<typename T> class Ev { public: typedef ... neither decltype nor typeof work either. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Testing if given number is integer

I am trying to implement user defined function which tests if a number is an integer: #include <iostream> ... for increasing and decreasing? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - What is the best solution to pause and resume pthreads?

I've found the following topic (here) about pthreads but there are many good solutions. I wanted to know if the ... Thanks again everyone!! :~) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - C++11 Variadic Printf performance

variadic template is introduced in c++11. And I found the printf function can be replaced using it. ... 847098807, diff(prinf-cout) -603226041 printf:243341748 cout:769877622...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Linking boost library with Boost_USE_STATIC_LIB OFF on Windows

My CMakeFiles.txt looks like this: cmake_minimum_required ( VERSION 2.6 ) # Set warnings on and enable ... project using dynamic libs? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Is it possible to embed a HTTP server in a Google Chrome extension?

Do you think it would be possible to embed a HTTP server inside a Google Chrome extension? I've seen other ... paid service. Thank you all! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Calling function template specialization using C calling conventions

I have the following template template<typename T> void f(T t) { } And I want to pass the address of a ... type has. Can anyone explain this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - race-condition in pthread_once()?

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Use #ifdefs and #define to optionally turn a function call into a comment

Is it possible to do something like this #ifdef SOMETHING #define foo // #else #define foo MyFunction #endif The ... will still be evaluated) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Should we still be optimizing "in the small"?

I was changing my for loop to increment using ++i instead of i++ and got to thinking, is this really ... one instead of multiplying by 2". See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Handle CTRL+C on Win32

I have some problems with the handling of CTRL+C events, in a Win32 C++ console program. Basically my ... the cause of process interruption? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Build Boost on Mac with Xcode

I've recently got acquainted with Boost library and I'd like to use it in my Xcode project. But sadly ... and use Boost libraries in Xcode? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - less verbose way to declare multidimensional std::array

Short question: Is there a shorter way to do this array<array<atomic<int>,n>,m> matrix; I was hoping for ... matrix; but it doesnt work... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to convert a string of hex values to a string?

Say I have a string like: string hex = "48656c6c6f"; Where every two characters correspond to the hex ... obviously won't work here. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to define template function within template class in *.inl file

I write template declaration in *.hpp file and their "definition" in *.inl file linked from *.hpp just ... can I here define extraTypedmethod? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Function to mangle/demangle functions

I have previously, here, been shown that C++ functions aren't easily represented in assembly. Now I am interested in ... My compiler is gcc 4.x. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - what is the type signature of a c++11/1y lambda function?

I was wondering if there is a standard way to get the type signature (i.e. the return type and the types ... object of the same type signature. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Possible to add an imported library to target_link_libraries that takes care of include directories too?

somehow I am struggling with finding out whether it is possible to define an imported library in CMake, specifying ... ? Thanks a lot. Martin See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - What happens when QueryPerformanceCounter is called?

I'm looking into the exact implications of using QueryPerformanceCounter in our system and am trying to understand ... does it really measure? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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518 views

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c++ - Smart pointers in container like std::vector?

I am learning about smart pointers (std::auto_ptr) and just read here and here that smart pointers (std::auto_ptr) ... stick to a STL approach. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to write a variadic template recursive function?

I'm trying to write a variadic template constexpr function which calculates sum of the template parameters given ... overloaded function found. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Matching an overloaded function to its polymorphic argument

Okay, the title is a mouthful and I think that's probably why it has been tough to find an answer through ... to achieve it? Thanks, Gary. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to split a tuple?

Given a template<typename First, typename... Tail> struct something { std::tuple<First, Tail...> t; }; How can I ... const { return 1; } }; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Is returning a 2-tuple less efficient than std::pair?

Consider this code: #include <utility> #include <tuple> std::pair<int, int> f1() { return std::make_pair(0x111 ... https://godbolt.org/g/T2Yqrj See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Can I disable exceptions in STL?

I want to disable exceptions in my C++ aplication, compiled under MSVC. I hve switched the option Enable C++ ... the RTTI is on or off. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - What is wrong with `std::set`?

In the other topic I was trying to solve this problem. The problem was to remove duplicate characters from a std: ... 't see the problem here! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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