Recent questions tagged C++

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c++ - Advantages of pass-by-value and std::move over pass-by-reference

I'm learning C++ at the moment and try avoid picking up bad habits. From what I understand, clang-tidy ... and just calling m_name{name}? 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 create a 8 bit mask from lsb of __m64 value?

I have a use case, where I have array of bits each bit is represented as 8 bit integer for example uint8_t ... to create single 8 bit integer? 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++ - OpenGL ray OBB intersection

I want to implement object picking in 3D so I have a Ray from a point on the screen towards the scene using ... distance = tMin; return true; } 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++ - No operator "=" matches these operands

So this must be something really silly, but I'm getting an error with this code. What could be going wrong ... thing, something is not working. 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++ - Should new/new[] match delete/delete[]?

I knew that when we allocate memory by using new/new[], then we should release the memory by using the delete/ ... pT3; pT3 = NULL; Thank you 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 make cin >> not convert float to integer?

I have the following simple code: #include <iostream> int main() { int a; std::cout << "enter integer a" << ... is not a good idea? thank you. 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++ - VC++ compiler for Qt Creator

I want to use the VC++ toolset to build programs for XP and Vista, but I do not want to buy the IDE, ... appreciated. MSDN links are not. :) 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 should I interpreter these VTune results?

I'm trying to parallelyzing this code using OpenMP. OpenCV (built using IPP for best efficiency) is used as ... VTune files or just ask! 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++ - Pass a string Recursively without Recreation

I answered a question here: https://stackoverflow.com/a/28862668/2642059 Where I needed to use recurrence to ... but not reconstruct a string? 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++ - g++ can't link curl lib files

I'm having some issues with getting g++ to link the curl lib files. I'm using Visual Studio 2017 with the ... the cpp file. Any ideas? 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++ - Regular expression capturing a repeated group

I am trying to parse input string using regular expression. I am getting problem when trying to capture a ... . Anyhelp will be appreciated. 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 make Random Numbers unique

I am making a random number generator. It asks how many digits the user wants to be in the number. for example it they ... else { i--; } } } 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++ - Function ReadProcessMemory keeps returning ERROR_PARTIAL_COPY

I know that there are other people that have asked this question but it seems as though none of them reached ... offer is deeply appreciated! :) 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 I define a constant equal to -2147483648?

I have a chunk of code generated by a script, and the code involves some integer constants. I ran ... Proto_Int<-2147483648,32> Typeinfo_77; 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++ - Multiple inheritance with one base class

(Removed original text as it is unrelated to the current question which has already been answered. See ... the general concept correct? 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++ - My program loops forever and does only a half of what I told it to do

I'm new to programming and I started to make my own Fire Emblem level up calculator, but for some reason it loops ... < endl; 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++ - When using fstream in a library I get linker errors in the executable

When I add #include <fstream> and try to use std::ifstream (i.e. std::ifstream ifile(pDest)) in ... .exe TestingZipper Any ideas why? 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++ - For loop prints an extra comma

cout<<"Set B : {"; for(i=0;i<b;i++) { cout<<setB[i]; cout<<","; } cout<<" }"<<endl; ... 3,} Any help would be appreciated. Thanks in advance! 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++ - Accessing protected member of template parameter

I have a template class for which I need to access a protected member function of the template parameter, like ... public interface of course). 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 combine skipping and non-skipping (lexeme) rules?

my parser is nearly working :) (still amazed by Spirit feature set (and compiletimes) and the very welcoming ... can't compile the example 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++ - slowness of first cudaMalloc (K40 vs K20), even after cudaSetDevice

I understand CUDA will do initialization during first API call, but the time spent is just too much. Even ... again later? Thanks in advance 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++ - where are member-vars of a class on the heap stored?

As a class is instantiated on the heap. Are all member vars then also allocated on the heap, or somewhere else. ... ptr->vec->push_back(42); } 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++ - Create Core context with GLUT/FreeGLUT?

I'm working on a project that utilizes freeglut and GLEW. In order to use the vertex and fragment shaders in my ... I'm using is PCLinuxOS). 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++ - Sorting two arrays based on one with standard library (copy steps avoided)

I have old code to maintain and I was replacing a custom QuickSort which was sorting two arrays based on array one ... )); } m_RowCol.clear(); 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++ - Listing message IDs and symbolic names stored in a resource-only library (DLL) using Win32 API

We would like to list the contents (key/value pairs) of messages embedded in a resource-only library (DLL) ... in the resource library. 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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301 views

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c++ - Reducing wiimote pitch/roll variations

I want to use the wiimote to control a cursor WITHOUT the infrared sensor bar. I'm using the pitch and roll ... the IR sensorbar?) Thanks! Dave See Question&Answers more detail:os...

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

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282 views

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c++ - Boost Serialization Binary Archive giving incorrect output

I am trying to Serialize a class. Class definition: class StartPeerSessionRequest { public: StartPeerSessionRequest(); ... let me know 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++ - Does calling a method on a NULL pointer which doesn't access any data ever fail?

Will the program: #include <stdio.h> struct foo { void blah() {printf("blah ");} int i; }; void main ... things even easier, with no downside. See Question&Answers more detail:os...

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

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