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    Consider this simple hierarchy: class Base { public: virtual ~Base() { } }; class Derived : public Base { } ... specify how it actually works). See Question&Answers more detail:os...
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    My Eclipse CDT keeps complaining "make: *** no rule to make target all" when I am trying to compile the piece ... answers help... Thanks a lot! See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have a function that processes a given vector, but may also create such a vector itself if it is not ... it, apart from programmer laziness? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    The definitions for std::atomic<> seem to show its obvious usefulness for primitive or perhaps POD-types. When ... avoid using it for classes? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    is there any way to disable compiler optimisation for a specific line of code in Visual studio? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I just started using Qt and noticed that it uses its own make tool, qmake. Why does Qt use its own make tool ... call the GCC C++ compiler? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I've recent been reading about immutable strings Why can't strings be mutable in Java and .NET? and Why . ... ever make it into boost? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am trying out some code on Ubuntu. I'm trying to run the following code #include <cstdlib> #include < ... would be really helpful! 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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    I know the size of a vector, which is the best way to initialize it? Option 1: vector<int> vec(3); //in ... Option1. Is it? Any other options? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I found that they have one key and multiple values which is unique. See Question&Answers more detail:os...
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    I have seen few Pet and Dog type examples for this type of basic question here and here, but they do ... terms of technical details. 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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    I have a TCP socket server and I want to do the following w/o using SSL: On server, make RSA key pair (I know ... how to do 2~4. Anyone knows? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Basically as far as I know, when you create a base class with a public, protected, and private ... apart my understanding of inheritance. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I want to get some string from a C/C++ library with ctypes into python. My code looks like this: ... : invalid pointer: 0x00000000026443fc *** See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I've been trying to compute real world coordinates of points from a disparity map using the reprojectImageTo3D() ... ); return point3f; } See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I need to create a virtual webcam that poses as a webcam, but takes as input a set of images that it plays. ... What would the flow look like ? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    In my C++ program (on Windows), I'm allocating a block of memory and can make sure it stays locked ... will be much 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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    I have a QThread which generates a fairly large amount of data regularly (couple of megabytes per second), ... it under various OSs. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am trying to use valarray since it is much like MATLAB while operating vector and matrices. I first did some performance ... ------------- See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I wrote a function along the lines of this: void myFunc(myStruct *&out) { out = new myStruct; out->field1 = 1; ... can't make much sense of 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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    In C++0x SFINAE rules have been simplified such that any invalid expression or type that occurs in the "immediate ... a little better? 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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    I have a QTcpSocket and I am reading into a loop. Each time a full packet has been read, or there has been ... return false; } return true; } See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I installed Xcode 4.3 and want to test this C++11 program: #include <type_traits> int main() { } However, ... /usr/include/c++/v1/type_traits See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    My workmate claims that for object types preincrement is more efficient than post increment e.g. std::vector<std::string> ... end(); 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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    I tried to make a traits to find if a method is virtual: (https://ideone.com/9pfaCZ) // Several structs ... detect if a method is virtual ? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    #include<iostream> using namespace std; class base { public: virtual void add() { cout << "hi"; } }; class ... ? Somehow it doesn't seem right. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I wonder if there is a reason why we can't initialize members at their declaration. class Foo { int ... any official clarification about 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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    Here is the problem: 1) I have a class like so: class some_class { public: some_type some_value; int some_function( ... , int, int, void*); See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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