Recent questions tagged C++

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c++ - Const and Non-Const Operator Overloading

I have a topic I'm confused on that I need some elaborating on. It's operator overloading with a const version and ... [1]. Thanks for any help. 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++ - Finding out the CPU clock frequency (per core, per processor)

Programs like CPUz are very good at giving in depth information about the system (bus speed, memory timings, ... (across all processors.) 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 does OpenMP handle nested loops?

Does the following code just parallelize the first (outer) loops, or it parallelize the entire nested loops? #pragma ... which is very import). 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++ - Simple Linux Signal Handling

I have a program that creates many threads and runs until either power is shutdown to the embedded computer, ... something really bad happens. 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 a buffer overflow and how do I cause one?

I have heard about a buffer overflow and I would like to know how to cause one. Can someone show me a small ... (And what they are used for?) 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 are near, far and huge pointers?

Can anyone explain to me these pointers with a suitable example ... and when these pointers are used? 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's the difference between long long and long

What's the difference between long long and long? And they both don't work with 12 digit numbers (600851475143), ... long a = 600851475143; } 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++ - Determine if Type is a pointer in a template function

If I have a template function, for example like this: template<typename T> void func(const std::vector<T>& v) Is ... std::vector<T*>& v) 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++ - Difference between Enum and Define Statements

What's the difference between using a define statement and an enum statement in C/C++ (and is there any ... 1234}; over #define BUFFER 1234 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 iterate std::set?

I have this code: std::set<unsigned long>::iterator it; for (it = SERVER_IPS.begin(); it != SERVER_IPS.end() ... . How I can obtain the value? 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++ - Why explicitly delete the constructor instead of making it private?

When/why would I want to explicitly delete my constructor? Assuming the reason is to prevent its usage, why not just ... Foo() = delete; }; 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++ - Compiling Cuda code in Qt Creator on Windows

I have been trying for days to get a Qt project file running on a 32-bit Windows 7 system, in which I ... TestCUDA TestCUDA.pro main.cpp test.cu 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++ - Why can't I add pointers?

I have code very similiar to this: LINT_rep::Iterator::difference_type LINT_rep::Iterator::operator+(const Iterator& right ... and not in both? 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 do you make a heterogeneous boost::map?

I want to have a map that has a homogeneous key type but heterogeneous data types. I want to be able to do ... to do. Thanks for your help. 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++ - Call base class method from derived class object

How can I call a base class method which is overridden by the derived class, from a derived class object? class Base ... bar here? return 0; } 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++ - CMake - remove a compile flag for a single translation unit

I would like to remove a set compile flag for a single translation unit. Is there a way to do this? (e. ... and thus this does not 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++ - Why does using a temporary object in the range-based for initializer result in a crash?

Why does the following code crash both on Visual Studio and GCC? For it to crash it requires the range-based ... link: http://ideone.com/IBmhDH 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++ - Configuring the GCC compiler switches in Qt, QtCreator, and QMake

I recently tried to use Qt Creator 1.3.2, Qt 4.6.2, and GCC 4.4.0 (32-bit version) on Windows ... switches when using QtCreator, QMake, and Qt? 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++ - Difference between creating object with () or without

i just run into the problem error: request for member show' in myWindow', which is of non-class type ... is the difference? Regards, Dirk 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 check if the program is run from a console?

I'm writing an application which dumps some diagnostics to the standard output. I'd like to have the application work ... . I'm on MinGW GCC. 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++ - Debug Assertion Failed! Expression: __acrt_first_block == header

I am trying to test the dll which I wrote with GoogleTest and when I call one of the tests It throws me this ... ); RUN_ALL_TESTS(); return 0; } 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++ - Generic iterator

I am trying to find a generic way of accessing a set of containers. I have a standard vector and list in ... elegant way to solve this problem? 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++ - CMake ExternalProject_Add() and FindPackage()

Is there are proper way to find a library (via FindPackage()) which was built with ExternalProject_Add()? The ... all inside my CMake project. 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++ - Casting pointer to Array (int* to int[2])

How do I cast or convert an int* into an int[x]? First, I know that pointers can be indexed. So ... see the answer by rodrigo below. 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++ - checking for eof in string::getline

How do I check for end-of-file using the std::getline function? If I use eof() it won't signal eof until I attempt to read beyond end-of-file. 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 exactly is an 'aligned pointer'?

Would somebody please tell me what an aligned pointer actually means? 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++ - difference between global operator and member operator

Is there a difference between defining a global operator that takes two references for a class and defining a member ... right.value; }; } 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 do traits classes work and what do they do?

I'm reading Scott Meyers' Effective C++. He is talking about traits classes, I understood that I need them ... (from technical point of view) See Question&Answers more detail:os...

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

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