Recent questions tagged C++

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I'm having a little trouble trying to sort a vector of pointers. This is what I have done so far: ... would be appreciated! Thanks. madshov 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++ - Programmatically getting the name of a derived class

I am attempting to do something like: class Base { public: Base() { cout << typeid(*this).name() << endl ... be part of a debug compile switch. 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't make sense of LARGE_INTEGER struct

With C++ and some Winapi things, I encountered this guy: #if defined(MIDL_PASS) typedef struct _LARGE_INTEGER { ... any type / variable name. 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++ - Set QLineEdit focus in Qt

I am having a qt question. I want the QLineEdit widget to have the focus at application startup. Take the ... before it's not working? 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 capture the screen with the "Tool Tips"?

I am using GDI to capture the screen, and I have noticed that the "Tool Tips" are not included in the ... does not display the Tool Tip. 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++ - auto_ptr for arrays

In short, I am wondering if there is an auto_ptr like type for arrays. I know I could roll my own, I' ... Is there anything like this out there? 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++ - watershed segmentation opencv xcode

I am now learning a code from the opencv codebook (OpenCV 2 Computer Vision Application Programming Cookbook): ... book. Thanks in advance! 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 check if an other program is running in fullscreen mode, eg. a media player

How can I check if an other app is running in full screen mode & topmost in c++ MFC? I just want to disable ... How could I do that? Thank you. 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 libraries compiled with visual studio in an application compiled by g++ (mingw)

Is it possible to use a library compiled by visual studio in an application compiled by g++ (mingw) on Windows? 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++ - Buffered and unbuffered stream

In case of buffered stream it said in a book that it wait until the buffer is full to write back to ... affect the results of future statements? 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 copy a file from a folder to another folder

How do I copy a file from one folder to another folder using C++? 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 there any problem of calling functions in the initialization list?

I'm writing this copy constructor: //CCtor of RegMatrix RegMatrix::RegMatrix(const RegMatrix &other){ this-> numRow ... numRow = other.getRow(); 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++ - Add time stamp with std::cout

I have the following code which is redirecting my std::cout output to a log file. std::ofstream out( ... somehow. Is that possible? 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 Clang/GCC really support a delay loading feature?

Would you mind to leave your comment on this if you have really experienced which relates to the title above? I ... you very much in advance. 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 Skin Detection

I've been doing some skin detection but can't get a smooth one. The image below contains the input ( ... } } return indexOfBiggestContour; } 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++ - When building a DLL file, does the generated LIB file contain the DLL name?

In Visual C++ , when I build a dll , the output files are .dll and .lib. Is the name of the dll built ... not contain the name of the dll . See Question&Answers more detail:os...

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

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183 views

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c++ - Windows Threading Wait Method

I'm creating a thread class to encapsulate the windows thread methods. I'm trying to create a method that makes ... , just areas to look into. 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 std::vector.pop_back() change vector's capacity?

If I allocated an std::vector to a certain size and capacity using resize() and reserve() at the ... reserved capacity and cause reallocations? See Question&Answers more detail:os...

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

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261 views

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c++ - cmake does not find qt 5.1.1

I just installed the Qt 5.1.1 for Windows 32-bit (MinGW 4.8, OpenGL) and tried to add it to my cmake. ... SDK, be sure it has been installed. 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++ - Getting the backtrace from the catch block

I am using backtrace to get the information from where the exception is thrown. In the constructor of my ... block for other exception types? 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++ - Should I std::move a shared_ptr in a move constructor?

Consider: #include <cstdlib> #include <memory> #include <string> #include <vector> #include <algorithm> #include < ... for any technical reason? 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 a class inherit from a template based on itself?

While reading an article, I came across the following syntax: template <typename T> class MyTemplate { T* ... please explain how this 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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435 views

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c++ - Why are FLT_MAX and FLT_MIN not positive and negative infinity, and what is their use?

Logically speaking, given the nature of floating point values, the maximum and minimum representable values of a float ... is the pattern.) See Question&Answers more detail:os...

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

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290 views

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c++ - Does attribute specifier sequence inherit?

Look at this snippet: struct [[nodiscard]] Result { }; struct DiscardableResult: Result { }; Does DiscardableResult ... to remove it somehow? 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++ - What is the difference between throw and throw with arg of caught exception?

Imagine two similar pieces of code: try { [...] } catch (myErr &err) { err.append("More info added to ... reuses the same object to rethrow 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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624 views

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c++ - to_string not declared in scope

I am trying to make the to_string(NUMBER) function work in my Ubuntu computer for weeks but it never ever works in ... c++0x in the pro file. See Question&Answers more detail:os...

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

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130 views

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c++ - Overloading template classes by template parameter number

Is it possible to have multiple versions of the same class which differ only in the number of template arguments ... that were written 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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348 views

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c++ - Compare vector<T>::iterator with vector<T>::reverse_iterator

I am working on an exercise where I have a vector and I am writing my own reverse algorithm by using a reverse ... do I get the pointers/index? See Question&Answers more detail:os...

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

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