Recent questions tagged C++

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c++ - How can I create and save file in Program File directory in Windows 7?

I have the program that show the registration window when it was started. When I set login and password the ... I need some example code. 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 find closed loops in graph networks

I have an undirected graph network made of streets and crossings, and I would like to know if there is any ... . Any help appreciated, 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++ - running shellcode + vs2010

I just tried the following code snippet for shellcode testing purposes:- #include<iostream> using namespace std; char sc ... I'm doing wrong? 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++ - Winsock recv not working after shutdown

I'm trying to get a simple winsock program working, so I create my socket and send my data just fine. Then ... should. Am I missing something? 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++ - Enlarge image pixels with opencv

int main(int argc, char** argv){ cv::Mat gray; cv::Mat resize; cv::Mat big; cv::cvtColor(src, ... pixels image must englarged into bigger image. 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++ - Why Base Class catch block catch derived class object?

Why does the Base catch handler catch a Derived object, as in: #include <iostream> using namespace std; class ... I was expecting "Default". 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++ - 56 Expression: (unsigned)(c + 1) <= 256

I am making a hashing program that is counting the number of each instance of a word in a text file. This is my count ... ; l = 0; } } } } 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++ - Function pointer to class member function

I want to make function which has function pointer as a parameter. #include <iostream> using namespace ... function without instantiation? 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 way to pass a std::string to a function that accepts a char* and changes its contents?

I'm trying to get back into programming, specifically console games. I'd heard that curses was good for that, so ... to forgo using C++ strings? 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 differentiate fill constructor and range constructor in C++11?

I suspect the prototypes of fill constructor and range constructor of std::vector (and many other STL types) ... NaiveVector is valid for A. 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-Vectorize comparison

I've problems getting my g++ 5.4 use vectorization for comparison. Basically I want to compare 4 unsigned ints using ... the g++ to use this? 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++ - Xcopy files to the new directory in pro/pri file

how can I copy the entire directory with the contents to new path using pro file. I tried " ... copy_to_output $${EXPORTED_DESTINATION_PATH}) } 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++ - Boost.Extension - simple inheritance sample - why we see no animals on linux?

So I try to port some Boost.Extension samples for linux. The sample is described here. Here is my code ... and reflection headers only lib. 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++ - Accessing files in resources folder in mac osx app bundle

I would like to access files which are inside Resources in app bundle. Unfortunately i cannot use QT resorces, as ... any help with this issue 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++ - Determine if a number contains a digit for class assignment

Write a function named containsDigit that determines if a number contains a particular digit. The header should look like: bool ... (10, a); } } See Question&Answers more detail:os...

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

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723 views

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c++ - Compiler does not see QX11Info

I've created a little class to set some global shortcuts. But now, when i compile my app i see many errors: ... . So, what is the problem? 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++ - Gettin line number of the called function

Please let me know if I can do it or not? I am writing a library that could work to track memory allocation and de- ... ---------------- 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++ - Boolean lambdas?

How come this code compiles??? LIVE CODE #include <iostream> int main() { auto lambda1 = []{}; auto lambda2 = ... bug? If not, is this standard? 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++ - Qt Download File - QNetworkAccessManager, not getting data

I'm trying to have my application download a file from a URL, typically an EXE or a Jar, not that this should ... / 01 What am I doing wrong? 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++ - Remove self from the container in the lambda

I want to register a callback that may remove itself from its container. But I found the captured variables seem to ... ](); return 0; } See Question&Answers more detail:os...

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

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589 views

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c++ - Is there a way to disable binding a temporary to a const reference?

In C++ it is possible to bind a temporary to a const reference: struct A {}; int main() { const A& a ... of this class to a const reference? 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++ - [UNIX] : Do I need to add all libraries in my project's makefile, that are used from a library, used in my project?

Ha, this sounds more complicated, than it actually is. Here's what I mean: Suppose I write an application, ... of linking (dynamic or static) 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++ - Create CImage from Byte array

I need to create a CImage from a byte array (actually, its an array of unsigned char, but I can cast to ... to an empty (zero filled) array. 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++ - static_cast VS reinterpret_cast when casting pointers to pointers

Given the following conditions: struct A { int a; }; struct B { int b; }; int main() { A a {1}; A ... B* pointer after this to access b member? 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 bias a random number generator

i am using the random number generator provided with stl c++. how do we bias it so that it produces ... probability than larger random numbers. See Question&Answers more detail:os...

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

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668 views

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c++ - QMenu: How to customize the menu items of QMenu

I want to build a dropdown list control with QPushButton and QMenu like below: QPushButton* menuBt = new QPushButton(" ... (this->width()); } 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++ - Retrieve File Description for an Application using VerQueryValue

I am really confused with this function. Currently I am successful in retrieving the FileVersion and ... lpTranslate -> wLanguage; See Question&Answers more detail:os...

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

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453 views

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c++ - Network byte order and endianness issues

I read on internet that standard byte order for networks is big endian, also known as network byte order. Before transferring ... of C, 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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