Recent questions tagged C++

0 votes

123 views

1 answer

c++ - OpenAL: How to create simple "Microphone Echo" programm?

So I wonder what would be shortest (in terms of effective lines) open AL code for reading data from default ... 7 under Visual Studio 2008 See Question&Answers more detail:os...

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

0 votes

155 views

1 answer

c++ - priority queue with limited space: looking for a good algorithm

This is not a homework. I'm using a small "priority queue" (implemented as array at the moment) ... queue algorithms, not implemnetations. See Question&Answers more detail:os...

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

0 votes

104 views

1 answer

c++ - strcmp or string::compare?

I want to compare two strings. Is it possible with strcmp? (I tried and it does not seem to work). Is ... the way string::compare worked too. See Question&Answers more detail:os...

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

0 votes

241 views

1 answer

c++ - calculate number of bits set in byte

I am interested, which is the optimal way of calculating the number of bits set in byte by this way template< ... recommended use this in code? See Question&Answers more detail:os...

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

0 votes

288 views

1 answer

c++ - Dangling references and undefined behavior

Assume a dangling reference x. Is it undefined behavior to just write &x; or even x; ? See Question&Answers more detail:os...

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

0 votes

248 views

1 answer

c++ - Const and non const template specialization

I have a class template which I use to get the size of a variable: template <class T> class Size { ... * in on template specialization? Thanks. See Question&Answers more detail:os...

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

0 votes

142 views

1 answer

c++ - Is there a way to write make_unique() in VS2012?

Herb Sutter propose a simple implementation of make_unique() there: http://herbsutter.com/gotw/_102/ Here it is ... with different args count? See Question&Answers more detail:os...

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

0 votes

112 views

1 answer

c++ - Sorting a list of a custom type

I want to have a stl list of objects where each object contains two int's. Afterwards I want to sort the list ... to sort after the first int? See Question&Answers more detail:os...

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

0 votes

175 views

1 answer

c++ - "volatile" qualifier and compiler reorderings

A compiler cannot eliminate or reorder reads/writes to a volatile-qualified variables. But what about the cases ... and the fourth assignments? See Question&Answers more detail:os...

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

0 votes

301 views

1 answer

c++ - Why can I call a non-constexpr function inside a constexpr function?

Consider the following code: #include <stdio.h> constexpr int f() { return printf("a side effect! "); } ... the program compile and print 15? See Question&Answers more detail:os...

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

0 votes

149 views

1 answer

c++ - Is constexpr really needed?

I have been looking at the new constexpr feature of C++ and I do not fully understand the need for it. For ... help me to change this opinion. See Question&Answers more detail:os...

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

0 votes

287 views

1 answer

c++ - How to use unordered_set with custom types?

Is it required that I create my own hash function for custom types? Is there no defaults I can use with unordered_set? See Question&Answers more detail:os...

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

0 votes

1.0k views

1 answer

c++ - MinGW error: ‘thread’ is not a member of ‘std’

I'm trying to cross-compile for Windows a simple application: #include <thread> void Func(){ return; } int main( ... , and here I'm stuck. See Question&Answers more detail:os...

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

0 votes

124 views

1 answer

c++ - How to implement "_mm_storeu_epi64" without aliasing problems?

(Note: Although this question is about "store", the "load" case has the same issues and is perfectly ... running afoul of strict aliasing? See Question&Answers more detail:os...

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

0 votes

270 views

1 answer

c++ - Multiple "could not be resolved" problems using Eclipse with minGW

I have recently installed (the latest builds of) 'Eclipse IDE for C/C++ Developers' and minGW (4.8.1) to ... /Test2/src line 170 Semantic Error See Question&Answers more detail:os...

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

0 votes

200 views

1 answer

c++ - How to get the Executable name of a window

I try to get the name of executable name of all of my launched windows and my problem is that: I use the ... ; } Thank you for your response. See Question&Answers more detail:os...

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

0 votes

205 views

1 answer

c++ - How to print boost::any to a stream?

I have a Map std::map<std::string, boost::any>, which comes from the boost::program_options package. Now ... like a reverse lexical_cast... See Question&Answers more detail:os...

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

0 votes

347 views

1 answer

c++ - google mock - can I call EXPECT_CALL multiple times on same mock object?

If I call EXPECT_CALL twice on the same mock object in the same TEST_F . . . what happens? Are the ... same mock + EXPECT_CALL are allowed. See Question&Answers more detail:os...

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

0 votes

241 views

1 answer

c++ - How is tr1::reference_wrapper useful?

recently I've been reading through Scott Meyers's excellent Effective C++ book. In one of the last tips ... would I use tr1::reference_wrapper? See Question&Answers more detail:os...

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

0 votes

191 views

1 answer

c++ - How to find if a variable is allocated in stack or heap?

Stumbled upon this interview question somewhere, In C, Given a variable x, how do you find out if the ... heap has any practical implications?) See Question&Answers more detail:os...

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

0 votes

268 views

1 answer

c++ - Extra leading zeros when printing float using printf?

I'd like to be able to write a time string that looks like this: 1:04:02.1 hours using printf. When ... add leading zeros to a float formatting? See Question&Answers more detail:os...

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

0 votes

556 views

1 answer

c++ - Visual Studio debugger error: Unable to start program Specified file cannot be found

I have a solution in C:full path hereVS2010lender.sln This solution contains many projects(around 100). When I ... exactly whatever it does) See Question&Answers more detail:os...

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

0 votes

424 views

1 answer

c++ - Simulating mouse clicks on Mac OS X does not work for some applications

I'm writing an application for Mac OS X 10.6 and later in C++. One part of the application needs to ... boundaries. What might be the cause? See Question&Answers more detail:os...

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

0 votes

453 views

1 answer

c++ - Using custom camera in OpenCV (via GStreamer)

I'm using Nitrogen6x board with ov5640 camera(mipi). The camera is not using standard v4l/v4l, but we ... be helpful and appreciated. Thanks! See Question&Answers more detail:os...

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

0 votes

323 views

1 answer

c++ - How can I use a std::valarray to store/manipulate a contiguous 2D array?

How can I use a std::valarray to store/manipulate a 2D array? I'd like to see an example of a 2D array ... ) block. No Java-style nested arrays. See Question&Answers more detail:os...

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

0 votes

231 views

1 answer

c++ - QT QWebEnginePage::setWebChannel() transport object

I'm using the QT WebEngine framework to display web pages. I'm injecting javascript into a page when it loads ... this way is also appreciated. See Question&Answers more detail:os...

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

0 votes

182 views

1 answer

c++ - Template metaprogram converting type to unique number

I just started playing with metaprogramming and I am working on different tasks just to explore the domain. One ... domain that I am exploring) See Question&Answers more detail:os...

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

0 votes

260 views

1 answer

c++ - Eclipse indexer errors when using STL with Android NDK

I'm using the Android NDK r7 with eclipse Indigo on Ubuntu. I set up my java project to use the C++ nature. ... I forgot to set up in eclipse ? See Question&Answers more detail:os...

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

Categories

Just Browsing Browsing

Most popular tags