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c++ Programming Glossary: secount Pixel coordinates x and y http://stackoverflow.com/questions/10767057/count-pixel-coordinates-x-and-y w n2. image height h n int Sx Sy const CvArr arr CvScalar se to store the num for int x 0 x image width x for int y 0 image.. for int x 0 x image width x for int y 0 image height y se cvGet2D image x y Sx se.val y Sx Sx Sy se.val x Sy Sy cout.. x for int y 0 image height y se cvGet2D image x y Sx se.val y Sx Sx Sy se.val x Sy Sy cout 3. sum x Sx n4. sum y Sy..
http://stackoverflow.com/questions/14149835/on-os-x-simple-c-program-gives-incorrect-results-which-are-a-result-of-comma on Linux will CORRECTLY give two different answers based on whether it's compiled with std c 0x or not. Problem I cannot.. int argc const char argv Thing Hello std endl return 0 To see what I mean do the following on Linux first just to see how.. To see what I mean do the following on Linux first just to see how it should work g main.cpp . a.out 0x401471 g std c 0x main.cpp..
Is an implementation allowed to site two identical function definitions at the same address, or not? http://stackoverflow.com/questions/14188612/is-an-implementation-allowed-to-site-two-identical-function-definitions-at-the-s are both null both point to the same function or both represent the same address. My initial interpretation was that functions.. My initial interpretation was that functions don't semantically have addresses per se at this level and that therefore.. was that functions don't semantically have addresses per se at this level and that therefore the or both represent..
Explanation of C++ FAQ's unsafe macro? http://stackoverflow.com/questions/16243509/explanation-of-c-faqs-unsafe-macro According to the C FAQ macros are evil 9.5 Why should I use inline functions instead of plain old #define macros Because.. inline functions instead of plain old #define macros Because #define macros are evil in 4 different ways evil#1 evil#2 evil#3.. evil#1 evil#2 evil#3 and evil#4. Sometimes you should use them anyway but they're still evil. Unlike #define macros inline..
Can an exception be thrown from the ternary operator? http://stackoverflow.com/questions/20848132/can-an-exception-be-thrown-from-the-ternary-operator allowed the conditional operator is the only option. In case of an error it would be nice to throw an exception from the.. it The above function doesn't compile however when used for example as live example std vector int v access v.begin.. compiler doesn't complain about the throw expression per se though. So the question Can exceptions be thrown from the conditional..
Links to official style guides http://stackoverflow.com/questions/2434213/links-to-official-style-guides to official style guides C has several types of styles MFC Boost Google etc. I would like to examine.. of styles MFC Boost Google etc. I would like to examine these styles and determine which one is best for my projects but I.. Does anyone have an official guide that they typically use Here are two that I found. I bet there are more http google..
C99 strict aliasing rules in C++ (GCC) http://stackoverflow.com/questions/2771023/c99-strict-aliasing-rules-in-c-gcc of C standard is that correct GCC must be specifying the semantics itself. I figure const_cast and static_cast cast between.. is that correct GCC must be specifying the semantics itself. I figure const_cast and static_cast cast between related.. rules are rooted in parts of the standard that were present in C and C since the beginning of standardized times. The..
Flexible array member in C-structure http://stackoverflow.com/questions/3047530/flexible-array-member-in-c-structure array member in C structure Quoting from the C std section 6.7.2.1 struct s int n double d This is a valid structure.. structure declaration. I am looking for some practical use of this kind of syntax. To be precise how is this construct.. for some practical use of this kind of syntax. To be precise how is this construct any more or less powerful than keeping..
pinvokestackimbalance — how can I fix this or turn it off? http://stackoverflow.com/questions/3506796/pinvokestackimbalance-how-can-i-fix-this-or-turn-it-off the IDE is stopping constantly to tell me about these things. For instance here's the C# signature DllImport ImageOperations.dll.. #define OPERATIONS_API __declspec dllexport #else #define OPERATIONS_API __declspec dllimport #endif extern C.. What's different between vs2010 and vs2008 that would cause these exceptions to get thrown Should I be adding a different..
http://stackoverflow.com/questions/4030043/overhead-of-dll of DLL I have a quite basic question. When a library is used only by a single process. Shall we keep it as static library.... single process. Shall we keep it as static library.. If i use library as DLL But only a single process use it . what will.. If i use library as DLL But only a single process use it . what will be overhead Thanks Sat c windows dll share..
Can multithreading speed up memory allocation? http://stackoverflow.com/questions/4859263/can-multithreading-speed-up-memory-allocation each group is run by a thread. Inside each group some classes invoke the 'new' operator a total of 10000 times. Rational.. program. One way I can speed up the system could be to use threads inside each 'group' so that the 10000 memory allocations.. improve this question Dynamic allocation of memory uses the heap of the application module process but not thread ...
Image Processing Library for C++ http://stackoverflow.com/questions/503526/image-processing-library-for-c C I need a library that can detect objects in an image uses edge detection . This is NOT related to captchas. I am working.. NOT related to captchas. I am working on an MTGO bot that uses OCR and that works in any screen resolution. In order for it.. where the row starts and ends on the y axis so that I can use OCR to read each line. c image processing ocr share improve..
What's the difference in GCC between -std=gnu++0x and -std=c++0x and which one should be used? http://stackoverflow.com/questions/5135734/whats-the-difference-in-gcc-between-std-gnu0x-and-std-c0x-and-which-one-s between std gnu 0x and std c 0x and which one should be used I'm having troubles with stdint.h when using std c 0x in GCC.. bug or actually since C 0x isn't published not a bug per se but an incomplete implementation of the current state of the.. does the C standard say Taking out n1256 7.18.1.1 3 These types are optional. However if an implementation provides integer..
Is there a general consensus in the C++ community on when exceptions should be used? [closed] http://stackoverflow.com/questions/5609503/is-there-a-general-consensus-in-the-c-community-on-when-exceptions-should-be-u there a general consensus in the C community on when exceptions should be used closed.. consensus in the C community on when exceptions should be used closed I just spent a few hours reading through SO questions.. in the C community on when exceptions should be used closed I just spent a few hours reading through SO questions on the..
Getting std :: ifstream to handle LF, CR, and CRLF? http://stackoverflow.com/questions/6089231/getting-std-ifstream-to-handle-lf-cr-and-crlf have ' r' without ' n'. Minimizing inconvenience for any users of the software. It's easy to workaround the issue but I'm.. into the string. There are three types of line endings seen in text files ' n' is the conventional ending on Unix machines.. the conventional ending on Unix machines ' r' was I think used on old Mac operating systems and Windows uses a pair ' r' following..
Implicit VS Explicit Conversion http://stackoverflow.com/questions/7099957/implicit-vs-explicit-conversion type Y by using an implicit conversion. I'm a little confused about the concepts of explicit vs implicit conversion I guess... of explicit vs implicit conversion I guess. In both cases you're taking an X and pushing it into a Y per se one uses.. both cases you're taking an X and pushing it into a Y per se one uses a Y's constructor and one uses the assignment operator..
What is the C++ equivalent for AutoResetEvent under Linux? http://stackoverflow.com/questions/8128221/what-is-the-c-equivalent-for-autoresetevent-under-linux is the C equivalent for AutoResetEvent under Linux The description of AutoResetEvent in MSDN.. for AutoResetEvent under Linux The description of AutoResetEvent in MSDN I'm trying to port a Thread Pool implemented in.. to C under Linux. I don't know which functions I should use that have similar behaviors to AutoResetEvent . c# .net c linux..
c++ EOF running one too many times? http://stackoverflow.com/questions/8236006/c-eof-running-one-too-many-times an issue where my code hangs which I believe is because my EOF is looping one too many times. I am imputing from a file.. n Student temp new Student temp .input studentFile sdb .insert temp This chunk of code is the code in question. The cout.. many times Once it gets the last bit of data it doesn't seem to register that the file has ended and loops in again but..
Is there any real risk to deriving from the C++ STL containers? http://stackoverflow.com/questions/922248/is-there-any-real-risk-to-deriving-from-the-c-stl-containers C STL containers The claim that it is a mistake ever to use a standard C container as a base class surprises me. If it is.. it is a mistake ever to use a standard C container as a base class surprises me. If it is no abuse of the language to declare.. ever to use a standard C container as a base class surprises me. If it is no abuse of the language to declare ... Example..
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