Recent questions tagged C++

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c++ - How to pass std::unique_ptr around?

I am having my first attempt at using C++11 unique_ptr; I am replacing a polymorphic raw pointer inside a ... indirections to reach my variable. 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++ - Rodrigues into Eulerangles and vice versa

I am useing solvePnP and i am getting a translation vector. Now i need to compare some euler angles with those ... which i couldn't find? 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++ - Test Automation with Embedded Hardware

Has anyone had success automating testing directly on embedded hardware? Specifically, I am thinking of automating a ... (sometimes 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++ - How to Log Stack Frames with Windows x64

I am using Stackdumps with Win32, to write all return adresses into my logfile. I match these with ... *** 58 called from 0000000000000000 STACK 000000000012F950 AddrRet...

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

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c++ - Interpretation of int (*a)[3]

When working with arrays and pointers in C, one quickly discovers that they are by no means equivalent although it ... it was just a typo). 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 obtain (almost) unique system identifier in a cross platform way?

I'm looking for a way to get a number which will almost surely change when running the code on different machines ... on Windows, Linux and Mac. 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++ - Hinnant's short_alloc and alignment guarantees

I have recently come across Howard Hinnant's short_alloc and this is the single best example of custom allocators ... missing something here... 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++ - Declaring a 2D vector

In some cases only the below line works.Why so? vector< vector<int>> a(M,N); This works in every case. vector< ... (N)); What's the difference? 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 do i write a pointer-to-member-function with std::function?

I know how to declare int fn(double) inside of std::function (std::function<int(double)>). I know how to write a ... fn); Test(new A, &fn2); } 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 parse text for a DSL at compile time?

Yes. That's right. I want to be able to paste an expression like: "a && b || c" directly ... potential answers are really worth documenting. 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++ - Passing structs to functions

I am having trouble understanding how to pass in a struct (by reference) to a function so that the struct's ... ? Hope someone can Help me. 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 does CV_8UC3 and the other types stand for in OpenCV?

I was surprised when I couldn't find anything in OpenCV documentation describing - with words - what the various ... ) CV_MAKETYPE(CV_64F,(n)) 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 do I make Visual Studio pause after executing a console application in debug mode?

I have a collection of Boost unit tests I want to run as a console application. When I'm working on the project and ... be. How can I do 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++ - Defining operator< for a struct

I sometimes use small structs as keys in maps, and so I have to define an operator< for them. Usually, ... garbage after the null terminators. 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++ - Confusing Template error

I've been playing with clang a while, and I stumbled upon "test/SemaTemplate/dependent-template-recover.cpp" ... to be syntactically correct? 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++ - Which is faster : if (bool) or if(int)?

Which value is better to use? Boolean true or Integer 1? The above topic made me do some experiments with bool ... question is what I've asked. 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++ - Will strlen be calculated multiple times if used in a loop condition?

I'm not sure if the following code can cause redundant calculations, or is it compiler-specific? for (int i ... every time when i increases? 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 implement static class member functions in *.cpp file?

Is it possible to implement static class member functions in *.cpp file instead of doing it in the header ... static functions always inline? 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++ - View default include path of C headers in Mac OS X by `gcc -v`?

I tried to find the default include path of the C compiler in Mac OS X (Mavericks) by using gcc -v: $ gcc -v ... path of C library in Mac OS X? 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 installing vcredist_x86.exe doesn't fix SideBySide error when I develop an EXE on one machine and run it on another one?

Issue I wrote a C++ project called 'Foo' using Microsoft Visual Studio 2005 Verison 8.0.50727.762 (SP. ... uuid.lib odbc32.lib odbccp32.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++ header files including each other mutually

I have two classes both defined in separate header files. Each file has a field that is type of other class. Now ... errors. What am i missing? 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 use the boost library (including shared_ptr) with the Android NDK and STLport

This is more of an answer than a question, because I've figured it out, at least as far as cleanly compiling ... and add it to your library. 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++ - Automatically pick a variable type big enough to hold a specified number

Is there any way in C++ define a type that is big enough to hold at most a specific number, presumably using ... there is a way. Any ideas? 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++ - Size of int and sizeof int pointer on a 64 bit machine

I was just wondering how can I know if my laptop is 64 or 32 bit machine. (it is a 64). So, I ... bit confused here, so 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++ - What's the syntax for declaring an array of function pointers without using a separate typedef?

Arrays of function pointers can be created like so: typedef void(*FunctionPointer)(); FunctionPointer functionPointers[] ... using the typedef? See Question&Answers more detail:os...

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

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169 views

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c++ - cannot open shared object file: No such file or directory

I met the share library not found on the head node of a cluster with torch. I have built the ... release/lib libsvmlight.a libsvmlight.so 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++ - Declaring array of int

Is there any difference between these two declarations? int x[10]; vs. int* x = new int[10]; I ... mean they are intrinsically the same? 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 can't run-time polymorphism be solved at compile time?

Consider: #include<iostream> using namespace std; class Base { public: virtual void show() { cout<<" In Base " ... it be solved at compile time? See Question&Answers more detail:os...

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

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