Recent questions tagged C

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Q: Smooth animations with QGraphicsScene

I hope my question isn't always the same question. I have a QGraphicsScene. Its items are some ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked Feb 20, 2022 in Education by JackTerrance

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Q: glPopAttrib & GL_INVALID_OPERATION

I'm working on some graphical application and i got an GL_INVALID_OPERATION after glPopAttrib(). Predicting ... glPopAttrib() glPopAttrib() glGetError() = GL_INVALID_OPERATION #...

asked Feb 19, 2022 in Education by JackTerrance

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Q: friend of specialized template class (C++)

#include using namespace std; template class test { T y; public: test(T k) : y(k) {} friend int a(T& x); }; template int a(T& x) { cout...

asked Feb 18, 2022 in Education by JackTerrance

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Q: OpenCV flann.h assertion Error

I wrote a program which gets matches between 2 pictures. And this is the code. but if I use ... JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked Feb 18, 2022 in Education by JackTerrance

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Q: Why this code is not efficient?

I want to improve the next code, calculating the mean: void calculateMeanStDev8x8Aux(cv::Mat* patch, int sx, int sy, int& ... the next loop with NEON intrinsics: for (int i=0; i...

asked Feb 18, 2022 in Education by JackTerrance

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Q: friend of specialized template class (C++)

#include using namespace std; template class test { T y; public: test(T k) : y(k) {} friend int a(T& x); }; template int a(T& x) { cout...

asked Feb 18, 2022 in Education by JackTerrance

0 votes

Q: How to access members by both name and as an array?

I have a bunch of vector classes. I have a 2D point vec2_t, a 3D point vec3_t and a 4D point ... , JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked Feb 18, 2022 in Education by JackTerrance

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Q: Why to put the entire header content within guard tokens?

C and C++ distinguishes between declarations an definitions. You can declare a symbol many times, but you ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked Feb 18, 2022 in Education by JackTerrance

0 votes

Q: Why to put the entire header content within guard tokens?

C and C++ distinguishes between declarations an definitions. You can declare a symbol many times, but you ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked Feb 18, 2022 in Education by JackTerrance

0 votes

Q: Substraction or decrement random access iterator pointing to begin

Consider following piece of code void foo( bool forwad ) { vector::iterator it, end_it; int dir; ... JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked Feb 18, 2022 in Education by JackTerrance