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c++ Programming Glossary: codeWhat is an undefined reference/unresolved external symbol error and how do I fix it? http://stackoverflow.com/questions/12573816/what-is-an-undefined-reference-unresolved-external-symbol-error-and-how-do-i-fix MSVS and undefined reference to symbolName for gcc . The code struct X virtual void foo struct Y X void foo struct A virtual.. visible. Symbols were defined in a C program and used in C code. Incorrectly importing exporting methods classes accross modules...
What are the rules about using an underscore in a C++ identifier? http://stackoverflow.com/questions/228783/what-are-the-rules-about-using-an-underscore-in-a-c-identifier digit or uppercase letter may be used for additional error code names. See Error Reporting. Names that begin with either 'is'..
What can I use to profile C++ code in Linux? http://stackoverflow.com/questions/375913/what-can-i-use-to-profile-c-code-in-linux can I use to profile C code in Linux I have a C application I'm in the process of optimizing... of optimizing. What tool can I use to pinpoint my slow code c unix profiling share improve this question If your goal.. and each time look at the call stack. If there is some code that is wasting some percentage of the time 20 or 50 or whatever..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three string already does it for you. Just compare the simple code using a std string member to the convoluted and error prone..
http://stackoverflow.com/questions/4421706/operator-overloading Most of the work in overloading operators is boiler plate code. That is little wonder since operators are merely syntactic.. But it is important that you get this boiler plate code right. If you fail either your operator ™s code won ™t compile.. plate code right. If you fail either your operator ™s code won ™t compile or your users code won ™t compile or your users..
Where and why do I have to put the “template” and “typename” keywords? http://stackoverflow.com/questions/610245/where-and-why-do-i-have-to-put-the-template-and-typename-keywords exactly are dependent names anyway I have the following code template typename T typename Tail Tail will be a UnionNode too... know yet whether the name is a template when parsing the code We will need to insert template immediately before the template.. enough cases we need both of typename and template . Your code should look like the following template typename T typename..
Can a local variable's memory be accessed outside its scope? http://stackoverflow.com/questions/6441218/can-a-local-variables-memory-be-accessed-outside-its-scope memory be accessed outside its scope I have the following code. int foo int a 5 return a int main int p foo cout p p 8 cout.. a 5 return a int main int p foo cout p p 8 cout p And the code is just running with no runtime exceptions The output was 5.. thoughts. Compilers are in the business of generating code which manages the storage of the data manipulated by that program...
How to debug heap corruption errors? http://stackoverflow.com/questions/1010106/how-to-debug-heap-corruption-errors and the surprisingly excellent book Writing Solid Code sentry values allow a little more space before and after each..
How do you make a HTTP request with C++? http://stackoverflow.com/questions/1011339/how-do-you-make-a-http-request-with-c Is it also possible to download the contents into a string Code samples would be good. c httprequest share improve this question..
Is gcc4.7 buggy about regular expressions? [duplicate] http://stackoverflow.com/questions/12530406/is-gcc4-7-buggy-about-regular-expressions someone might be working on it for a Google Summer Of Code project but I don't know details or its status. There doesn't..
What open source C++ static analysis tools are available? [closed] http://stackoverflow.com/questions/141498/what-open-source-c-static-analysis-tools-are-available Oink http danielwilkerson.com oink index.html C and C Code Counter http sourceforge.net projects cccc Splint from answers..
Best open XML parser for C++ [closed] http://stackoverflow.com/questions/170686/best-open-xml-parser-for-c Depending on you use you may use an XML Data Binding CodeSynthesis XSD is an XML Data Binding compiler for C developed.. XSD is an XML Data Binding compiler for C developed by Code Synthesis and dual licensed under the GNU GPL and a proprietary.. and serialization code. One of the unique features of CodeSynthesis XSD is its support for two different XML Schema to..
C++ - What should go into an .h file? http://stackoverflow.com/questions/1945846/c-what-should-go-into-an-h-file typically go in header files. In a word definitions . Code files .cpp are designed to provide the implementation information..
How do I start a new CUDA project in Visual Studio 2008? http://stackoverflow.com/questions/2046228/how-do-i-start-a-new-cuda-project-in-visual-studio-2008 click on the project and choose Properties then in C C Code Generation change the Runtime Library to MT or MTd for debug.. click on the project and choose Properties then in C C Code Generation change the Runtime Library to MT or MTd for debug..
Reading from text file until EOF repeats last line http://stackoverflow.com/questions/21647/reading-from-text-file-until-eof-repeats-last-line it read the integer on the last line twice How to fix this Code #include iostream #include fstream using namespace std int main..
When and why will an OS initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete? http://stackoverflow.com/questions/370195/when-and-why-will-an-os-initialise-memory-to-0xcd-0xdd-etc-on-malloc-free-new is useful I remember reading something maybe in Code Complete 2 that it is good to initialise memory to a known pattern..
C++ performance challenge: integer to std::string conversion http://stackoverflow.com/questions/4351371/c-performance-challenge-integer-to-stdstring-conversion NRVO getting rid of return by value helped only on gcc. Code was found that outperforms sprintf by an order of magnitude...
What are access specifiers? Should I inherit with private, protected or public? http://stackoverflow.com/questions/5447498/what-are-access-specifiers-should-i-inherit-with-private-protected-or-public within the class. No outside Access is allowed. An Source Code Example class MyClass public int a protected int b private int.. before are further then applied to these members. Code Example Class Base public int a protected int b private int.. Class become Protected Members of the Derived Class. A Code Example Class Base public int a protected int b private int..
What's the best Free C++ Profiler for Windows? http://stackoverflow.com/questions/67554/whats-the-best-free-c-profiler-for-windows c windows profile share improve this question AMD Code Analyst is free but not as advanced as VTune. There's also Sleepy..
how to achieve 4 FLOPs per cycle http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle r8 rA r0 _mm_add_pd r0 r4 r0 _mm_add_pd r0 r8 Prevent Dead Code Elimination double out 0 __m128d temp r0 out double temp 0 out.. r0 _mm256_add_pd r0 r4 r0 _mm256_add_pd r0 r8 Prevent Dead Code Elimination double out 0 __m256d temp r0 out double temp 0 out..
OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection http://stackoverflow.com/questions/8667818/opencv-c-obj-c-detecting-a-sheet-of-paper-square-detection and further processing p Input Output Original image click Code double angle cv Point pt1 cv Point pt2 cv Point pt0 double dx1..
Why is reading lines from stdin much slower in C++ than Python? http://stackoverflow.com/questions/9371238/why-is-reading-lines-from-stdin-much-slower-in-c-than-python each usually about 20 chars wide though sometimes more . Code char input_a 512 char input_b 32 char input_c 512 while scanf..
What XML parser should I use in C++? http://stackoverflow.com/questions/9387610/what-xml-parser-should-i-use-in-c You are forced to manage context state and so forth. Code that reads a SAX style API is a lot more spread out than one..
C++ Build Systems - What to use? http://stackoverflow.com/questions/12017580/c-build-systems-what-to-use with crappy build systems. Yes they are all awful. ABOUT CODE GENERATION Scons works on phases and they are somewhat static..
Cuda version not working while serial working http://stackoverflow.com/questions/13630817/cuda-version-not-working-while-serial-working 2 i if idx i continue NOTE THIS LINE MISSING FROM YOUR GPU CODE Point2D other_pt a 2 i a 2 i 1 pol.cut curPt other_pt pol.dummy..
How to make generic computations over heterogeneous argument packs of a variadic template function? http://stackoverflow.com/questions/14261183/how-to-make-generic-computations-over-heterogeneous-argument-packs-of-a-variadic Ts ... args static for int i 0 i sizeof... args i PSEUDO CODE foo nth_value_of i args Which would get translated at compile..
Delaunay triangulation opencv c++ http://stackoverflow.com/questions/16603780/delaunay-triangulation-opencv-c cvRound t 3 pt 2 Point cvRound t 4 cvRound t 5 MY PIECE OF CODE draw true for int i 0 i 3 i if pt i .x img.width pt i .y img.heigth..
Should custom containers have free begin/end functions? http://stackoverflow.com/questions/17562943/should-custom-containers-have-free-begin-end-functions public YES DOCUMENT REALLY WELL THAT THE EXISTING CODE IS BEING MODIFIED auto begin decltype legacy_begin return legacy_begin..
building and accessing a list of types at compile time http://stackoverflow.com/questions/18701798/building-and-accessing-a-list-of-types-at-compile-time on the list. So for example foo.h class Foo ... INSERT ANY CODE HERE bar.h class Bar ... INSERT ANY CODE HERE main.h #include.. ... INSERT ANY CODE HERE bar.h class Bar ... INSERT ANY CODE HERE main.h #include foo.h #include bar.h struct list_of_types.. #include bar.h struct list_of_types typedef INSERT ANY CODE HERE type I can insert any code into the slots above so long..
How does dereferencing of a function pointer happen? http://stackoverflow.com/questions/2795575/how-does-dereferencing-of-a-function-pointer-happen in way you think a function's pointer means accessing a CODE memory as it would be a DATA memory. Function pointer isn't.. holding function's pointer mean the same address to CODE memory. And it allows to jump to that memory by using call syntax..
Windows Vista/Win7 Privilege Problem: SeDebugPrivilege & OpenProcess http://stackoverflow.com/questions/2932461/windows-vista-win7-privilege-problem-sedebugprivilege-openprocess endl else cout FAILED TO CHANGE TOKEN PRIVILEGES CODE GetLastError endl CloseHandle hToken Enable SeDebugPrivilege..
const pointer assign to a pointer http://stackoverflow.com/questions/3316562/const-pointer-assign-to-a-pointer a book I'm reading. Just cannot get the code to compile. CODE int _tmain int argc _TCHAR argv MyString strg new MyString 10..
Is 'volatile' needed in this multi-threaded C++ code? http://stackoverflow.com/questions/3612505/is-volatile-needed-in-this-multi-threaded-c-code this behaviour I've stripped away irrelevant parts CODE EXECUTED BY THE GUI THREAD class ProgressBarDialog protected.. true break return TRUE return FALSE ... CODE EXECUTED BY THE WORKER THREAD class CsvFileHandler This points..
http://stackoverflow.com/questions/4707310/xutility-file haarcascade_frontalface_alt_tree.xml BEGIN NEW CODE #define WRITEVIDEO char outputVideo c face_counting1_tracked.avi.. outputVideo 1 30 cvSize 240 180 #endif END NEW CODE int main int argc char argv CvCapture capture 0 IplImage frame..
http://stackoverflow.com/questions/5072845/scope-with-brackets-in-c in your code then your code is badly written. For example CODE int foo stuff use foo and then I'm done using it forever MORE.. foo stuff use foo and then I'm done using it forever MORE CODE c share improve this question Yes because this has the..
Check if a class has a member function of a given signature http://stackoverflow.com/questions/87372/check-if-a-class-has-a-member-function-of-a-given-signature boost serialization namespace so you have IN YOUR CLIENT CODE to open namespace boost and namespace serialization And a second..
STL vectors with uninitialized storage? http://stackoverflow.com/questions/96579/stl-vectors-with-uninitialized-storage a clarification about when the initialization occurs. SOME CODE void GetsCalledALot int data1 int data2 int count int mvSize..
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