¡@
c++ Programming Glossary: performWhy isn't sizeof for a struct equal to the sum of sizeof of each member? http://stackoverflow.com/questions/119123/why-isnt-sizeof-for-a-struct-equal-to-the-sum-of-sizeof-of-each-member so that data members are optimally aligned for better performance. Many processors perform best when fundamental data types.. optimally aligned for better performance. Many processors perform best when fundamental data types are stored at byte addresses..
C++ Accesses an Array out of bounds gives no error, why? http://stackoverflow.com/questions/1239938/c-accesses-an-array-out-of-bounds-gives-no-error-why efficient. The language standard does not require that it performs bounds checking although it does not forbid it either . A vector.. also has the at member function which is guaranteed to perform bounds checking. So in C you get the best of both worlds if.. of both worlds if you use a vector. You get array like performance without bounds checking and you get the ability to use bounds..
http://stackoverflow.com/questions/162941/why-use-pointers a null character was found. It is not wrong or illegal to perform this printf statement since a pointer actually is of the type.. note that you can still use the variable x after you have performed a free of the allocated memory but you do not know what is.. is no guarantee that the second allocation of memory is performed in the same space as the first one. share improve this answer..
Best open XML parser for C++ [closed] http://stackoverflow.com/questions/170686/best-open-xml-parser-for-c to handle large XML documents that would not fit in memory perform stream oriented processing or use an existing in memory representation...
pure virtual function with implementation http://stackoverflow.com/questions/2089083/pure-virtual-function-with-implementation also be the case what you want derived classes to always perform their own work but also be able to call a common set of functionality...
Constants and compiler optimization in C++ http://stackoverflow.com/questions/212237/constants-and-compiler-optimization-in-c practice I don't think there are compilers out there that perform any significant optimizations for all kinds of const objects...
Does the size of an int depend on the compiler and/or processor? http://stackoverflow.com/questions/2331751/does-the-size-of-an-int-depend-on-the-compiler-and-or-processor will even have certain practical value it can be used to perform run time tests of the portability of C C programs. But that's..
When does invoking a member function on a null instance result in undefined behavior? http://stackoverflow.com/questions/2474018/when-does-invoking-a-member-function-on-a-null-instance-result-in-undefined-beha it at all or to use it in the more formal sense of perform lvalue to rvalue conversion Regardless it definitely cannot..
How can a Windows service execute a GUI application? http://stackoverflow.com/questions/267838/how-can-a-windows-service-execute-a-gui-application and this works for me because most of them only perform backend processing. Recently I need to run applications that..
Why does C++ compilation take so long? http://stackoverflow.com/questions/318398/why-does-c-compilation-take-so-long like it should explain why it takes so long. c compiler performance compilation share improve this question Several reasons.. the compiler. A C# program can rely on the JIT compiler to perform additional optimizations at load time C doesn't get any such..
When should static_cast, dynamic_cast and reinterpret_cast be used? http://stackoverflow.com/questions/332030/when-should-static-cast-dynamic-cast-and-reinterpret-cast-be-used option. C style casts also ignore access control when performing a static_cast which means that they have the ability to perform.. a static_cast which means that they have the ability to perform an operation that no other cast can. This is mostly a kludge..
Why have header files and .cpp files in C++? [closed] http://stackoverflow.com/questions/333889/why-have-header-files-and-cpp-files-in-c implemented will do while the cpp file defines how it will perform those features. This reduces dependencies so that code that..
Finding C++ static initialization order problems http://stackoverflow.com/questions/335369/finding-c-static-initialization-order-problems valgrind but we may have memory analysis tools that could perform a similar function. That would catch problems only where the..
Which, if any, C++ compilers do tail-recursion optimization? http://stackoverflow.com/questions/34125/which-if-any-c-compilers-do-tail-recursion-optimization if the compiler did the optimization that I know of is perform a call that would otherwise result in a stack overflow or looking..
C++ performance challenge: integer to std::string conversion http://stackoverflow.com/questions/4351371/c-performance-challenge-integer-to-stdstring-conversion performance challenge integer to std string conversion Can anyone beat.. integer to std string conversion Can anyone beat the performance of my integer to std string code linked below There are.. jh3Sa sprintf which SO ers usually recommend to the performance conscious http ideone.com 82kwR Contrary to popular belief..
C++11 rvalues and move semantics confusion http://stackoverflow.com/questions/4986673/c11-rvalues-and-move-semantics-confusion The std move on tmp is unnecessary and can actually be a performance pessimization as it will inhibit return value optimization... no copy no move or if the compiler decides it can not perform RVO then it will use vector's move constructor to do the return... move constructor to do the return. Only if RVO is not performed and if the returned type did not have a move constructor would..
http://stackoverflow.com/questions/5854581/polymorphism-in-c of it. Consider Type1 x Type2 y f x f y Here f is to perform some operation and is being given values x and y as inputs...
Subclass/inherit standard containers? http://stackoverflow.com/questions/6806173/subclass-inherit-standard-containers from the container. A good rule of thumb is if you can perform what you need using the public interface of a type make that..
Why doesn't Java offer operator overloading? [closed] http://stackoverflow.com/questions/77718/why-doesnt-java-offer-operator-overloading tells the compiler to create 3 objects on the stack perform addition and copy the resultant value from the temporary object.. the existing object 'a'. However in java operator doesn't perform value copy for reference types and users can only create new.. so the comparison will result not equal. In Java operator performs reference copy so 'a' and 'b' are now refering to the same..
Detection of rectangular bright area in a Image using OpenCv http://stackoverflow.com/questions/10581451/detection-of-rectangular-bright-area-in-a-image-using-opencv 1 Blur Mat new_img img.clone medianBlur new_img new_img 5 Perform threshold double thres 210 double color 255 threshold new_img..
Tag editor component for Delphi/C++Builder http://stackoverflow.com/questions/12597678/tag-editor-component-for-delphi-cbuilder begin inherited case Key of VK_END ShowEditor VK_DELETE Perform WM_CLEAR 0 0 VK_INSERT Perform WM_PASTE 0 0 end end procedure.. VK_END ShowEditor VK_DELETE Perform WM_CLEAR 0 0 VK_INSERT Perform WM_PASTE 0 0 end end procedure TTagEditor.KeyPress var Key Char.. var Key Char begin inherited case Key of ^C begin Perform WM_COPY 0 0 Key #0 Exit end ^X begin Perform WM_CUT 0 0 Key..
Perform a simple HTTP request using C++ / Boost via a proxy? http://stackoverflow.com/questions/1430495/perform-a-simple-http-request-using-c-boost-via-a-proxy a simple HTTP request using C Boost via a proxy I'm quite a..
How can I measure CPU time and wall clock time on both Linux/Windows? http://stackoverflow.com/questions/17432502/how-can-i-measure-cpu-time-and-wall-clock-time-on-both-linux-windows double get_wall_time LARGE_INTEGER time freq if QueryPerformanceFrequency freq Handle error return 0 if QueryPerformanceCounter.. freq Handle error return 0 if QueryPerformanceCounter time Handle error return 0 return double time.QuadPart.. here's what the above snippet uses For Windows Wall Time Performance Counters CPU Time GetProcessTimes For Linux Wall Time gettimeofday..
Modular Exponentiation for high numbers in C++ http://stackoverflow.com/questions/2207006/modular-exponentiation-for-high-numbers-in-c modulus Start with exponentiation by squaring as you have. Perform the actual squaring in a 64 bit unsigned integer. Reduce modulo..
http://stackoverflow.com/questions/3561613/c-using-too-much-cpu szWindowClass MAX_LOADSTRING MyRegisterClass hInstance Perform application initialization if InitInstance hInstance nCmdShow..
Perform argument substitution on nested boost::bind without composition http://stackoverflow.com/questions/4091576/perform-argument-substitution-on-nested-boostbind-without-composition argument substitution on nested boost bind without composition..
Programming Contest Question: Counting Polyominos http://stackoverflow.com/questions/4650762/programming-contest-question-counting-polyominos x 0 x matrix.length x if matrix x y break bottom b Perform the real crop boolean cropped new boolean matrix.length l r..
How can I know which parts in the code are never used? http://stackoverflow.com/questions/4813947/how-can-i-know-which-parts-in-the-code-are-never-used Use the Clang library to get an AST abstract syntax tree Perform a mark and sweep analysis from the entry points onward Because..
When does postincrement i++ get executed? [duplicate] http://stackoverflow.com/questions/5433852/when-does-postincrement-i-get-executed does that happen What I imagine is the following Option 1 Perform x 2 times. Each time you do x you change the value of x.. but..
CUDA: reduction or atomic operations? http://stackoverflow.com/questions/5923978/cuda-reduction-or-atomic-operations global memory and updates the reduced value from these 2 Perform the reduction algorithm within the block to get one final reduced..
Rendering QImage on QGLWidget of QML plugin http://stackoverflow.com/questions/8446437/rendering-qimage-on-qglwidget-of-qml-plugin from Video so I create a new one QPainter gl_painter this Perform drawing as Qt KeepAspectRatio gl_painter.fillRect QRectF QPoint..
Using C++ Boost's Graph Library http://stackoverflow.com/questions/8812466/using-c-boosts-graph-library add_edge 3 5 g boost add_edge 4 6 g boost add_edge 5 6 g Perform a topological sort. std deque int topo_order boost topological_sort..
|