Recent questions tagged C++

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c++ - __attribute__((weak)) and static libraries

I wanted to introduce a weak symbol into my code, however, I am unable to comprehend its behavior when *.a ... compilation is out of option). 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++ cli - Does the ^ symbol replace C#'s "ref" in parameter passing in C++/CLI code?

In C#, passing by reference is: void MyFunction(ref Dog dog) But in C++/CLI code examples I have seen so ... .. Does it work similarly? 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++ - Exceptions silently caught by Windows, how to handle manually?

We're having problems with Windows silently eating exceptions and allowing the application to continue running, when ... report any problems. 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++ - OpenMP performance

Firstly, I know this [type of] question is frequently asked, so let me preface this by saying I've read as ... to get the parallelism going... 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 increase the maximum memory allocated on the stack/heap

How can one increase the maximum memory allocated on the stack/heap for a program in C++? Will increasing the ... memory of a computer program? 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 declare a global variable that could be used in the entire program

I have a variable that I would like to use in all my classes without needing to pass it to the class constructor ... this in C++? 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++ - Are Windows timezone written in registry reliable?

I'm creating a c++ project that should works on several timezone. The application receives an event, with a ... remains the same on Windows 10 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++ - Where is a file mounted?

Given a path to a file or directory, how can I determine the mount point for that file? For example, if ... in function that does this already! 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++ - return() versus pthread_exit() in pthread start functions

The following program shows that we can use return or pthread_exit to return a void* variable that is available to ... after task2 10 10 World 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++ - Repeated integer division by a runtime constant value

At some point in my program I compute an integer divisor d. From that point onward d is going to be constant. ... fits in 32-bit quite well. 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++ - PThread vs boost::thread?

Having no experience with threading in the past, which threading technique in C++ will be the easiest for a beginner? boost::thread or pthreads? 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++ - Passing vector by reference

Using normal C arrays I'd do something like that: void do_something(int el, int **arr) { *arr[0] = el; / ... type". How to do this properly? 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 query if(T==int) with template class

When I'm writing a function in a template class how can I find out what my T is? e.g. template <typename ... the above if statement so it 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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c++ - Combining a vector of strings

I've been reading Accelerated C++ and I have to say it's an interesting book. In chapter 6, I have to ... How do I join the strings together? 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++ - In gcc, how to mute the -fpermissive warning?

I am including a file from a third-party library that raises an error that can be downgraded to a warning ... can mimic this behavior? 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++ - Use of "Public" in a derived class declaration?

Given this base class: class Employee { char* name; int age; public: Employee(char* name); void print(); }; With ... * people); void print(); }; 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++ - 0xDEADBEEF vs. NULL

Throughout various code, I have seen memory allocation in debug builds with NULL... memset(ptr,NULL,size); Or ... still deference to valid data? 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::vector as a template function argument

I want to make a class method that takes a std::vector reference as an argument and I want to use it with ... in a class. Thanks for help! 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++ - Can you use a shared_ptr for RAII of C-style arrays?

I'm working on a section of code that has many possible failure points which cause it to exit the function early. The ... { return; } //etc. } 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++ - Is it possible to roll a significantly faster version of sqrt

In an app I'm profiling, I found that in some scenarios this function is able to take over 10% of total ... cycles is SQRT anyway these days? 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++ - Can c++11 parameter packs be used outside templates?

I was wondering if I could have parameter packs consisting of a single, explicitly specified, type. For example, something ... int... args) { } 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 use alpha transparency in OpenGL?

Here's my code: void display(void); int main(int argc, char** argv) { glutInit(&argc, argv); ... I missed to enable alpha transparency? 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 cast vector<unsigned char> to char*

I have a buffer like this: vector<unsigned char> buf How can I cast it to char*? If I do: (char *)buf I ... server)); And it only accepts char*. 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++ - Error "fatal error C1034: windows.h: no include path set"

OS Windows Vista Ultimate I am trying to run a program called minimal.c. When I type at the command ... exhausted all possibilities. Any ideas? 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++ - Is .NET "all COM underneath"?

I've been an admirer of Juval Lowy's teaching and guidance in .NET development for a number of years. He's ... podcast in question. See Page 7. 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 correctly create dependencies between targets in CMake?

I am trying to use CMake to set up some simple dependencies between a C++ project and the ... .cpp) target_link_libraries(Dependency) 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 guide GCC optimizations based on assertions without runtime cost?

I have a macro used all over my code that in debug mode does: #define contract(condition) if (!(condition)) ... that it is always optimized out? 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 pass parameters to the gtest

How can I pass parameter to my test suites? gtest --number-of-input=5 I have the following main gtest ... run specific test cases in GoogleTest See Question&Answers more detail:os...

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

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