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c++ Programming Glossary: startWhy is processing a sorted array faster than an unsorted array? http://stackoverflow.com/questions/11227809/why-is-processing-a-sorted-array-faster-than-an-unsorted-array loop runs faster std sort data data arraySize Test clock_t start clock long long sum 0 for unsigned i 0 i 100000 i Primary loop.. sum data c double elapsedTime static_cast double clock start CLOCKS_PER_SEC std cout elapsedTime std endl std cout sum sum.. this the next loop runs faster Arrays.sort data Test long start System.nanoTime long sum 0 for int i 0 i 100000 i Primary loop..
What should main() return in C and C++? http://stackoverflow.com/questions/204476/what-should-main-return-in-c-and-c It can only be entered and left once marking program start and termination according to the C standard. For C the case..
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 for additional type names. Personally I just don't start identifiers with underscores. New addition to my rule Don't..
C++ Timer function to provide time in nano seconds http://stackoverflow.com/questions/275004/c-timer-function-to-provide-time-in-nano-seconds using namespace std int main int argc char argv clock_t start double diff start clock diff std clock start double CLOCKS_PER_SEC.. std int main int argc char argv clock_t start double diff start clock diff std clock start double CLOCKS_PER_SEC cout printf.. argv clock_t start double diff start clock diff std clock start double CLOCKS_PER_SEC cout printf diff ' n' return 0 The above..
http://stackoverflow.com/questions/3106110/what-is-move-semantics to understand move semantics with example code. Let's start with a very simple string class which only holds a pointer to..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom manage in an otherwise useless class a dynamic array. We start with a working constructor copy constructor and destructor #include..
Why have header files and .cpp files in C++? [closed] http://stackoverflow.com/questions/333889/why-have-header-files-and-cpp-files-in-c
What are Aggregates and PODs and how/why are they special? http://stackoverflow.com/questions/4178175/what-are-aggregates-and-pods-and-how-why-are-they-special and we just learnt that these are aggregates. So let's start with them. Type array_name n a 1 a 2 ... a m if m n the i th..
How to convert a number to string and vice versa in C++ http://stackoverflow.com/questions/5290089/how-to-convert-a-number-to-string-and-vice-versa-in-c . If you are not familiar with boost it is a good idea to start with a small library like this lexical_cast. To download and..
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
WChars, Encodings, Standards and Portability http://stackoverflow.com/questions/6300804/wchars-encodings-standards-and-portability etc int wmain const std vector std wstring args user starts here #if defined _WIN32 defined WIN32 #include windows.h extern.. but at all interfaces to the system . For example if you start with int main int argc char argv you have already lost Unicode..
What is a lambda expression in C++11? http://stackoverflow.com/questions/7627098/what-is-a-lambda-expression-in-c11 v.begin double d return d 0.00001 0 d however when you start to write more complex lambdas you will quickly encounter cases..
What are the differences between struct and class in C++ http://stackoverflow.com/questions/92859/what-are-the-differences-between-struct-and-class-in-c reasons for choosing one or the other in OO design. I'll start with an obvious difference If you don't specify public or private..
What is the difference between char a[] = “string”; and char *p = “string”; http://stackoverflow.com/questions/9460260/what-is-the-difference-between-char-a-string-and-char-p-string when the compiler sees the expression a 3 it emits code to start at the location a move three elements past it and fetch the.. there. When it sees the expression p 3 it emits code to start at the location p fetch the pointer value there add three element..
Start thread with member function http://stackoverflow.com/questions/10673585/start-thread-with-member-function thread with member function I am trying to execute a std thread..
How to create a DLL with SWIG from Visual Studio 2010 http://stackoverflow.com/questions/11693047/how-to-create-a-dll-with-swig-from-visual-studio-2010 of .cxx for the wrap file extension in steps 14 and 19. Start Visual Studio 2010 File New Project from Existing Code... Select..
Compiling Qt 4.8.x for Visual Studio 2012 http://stackoverflow.com/questions/12113400/compiling-qt-4-8-x-for-visual-studio-2012 Source JavaScriptCore wtf HashSet.h by this HashSet.h . Start VS2012 x64 Native Tools Command Prompt Switch to Qt 4.8.3 source..
Why do I need strand per connection when using boost::asio? http://stackoverflow.com/questions/12794107/why-do-i-need-strand-per-connection-when-using-boostasio written to with a composed operation. void start Start read and write chains. If multiple threads have called run on..
Sizeof array passed as parameter http://stackoverflow.com/questions/1328223/sizeof-array-passed-as-parameter this example approximately as follows void foo char a 100 Start at identifier 'a' 'a' is a Move right we find a so we reverse..
How can I use C++ code to interact with PHP? http://stackoverflow.com/questions/1502244/how-can-i-use-c-code-to-interact-with-php a linux box a C compiler and good ol PHP oh and MySQL too. Start me off Please php c performance compiled share improve this..
What are the Complexity guarantees of the standard containers? http://stackoverflow.com/questions/181693/what-are-the-complexity-guarantees-of-the-standard-containers 1 c stl containers big o share improve this question Start here STL Complexity Specifications . Then read through all the..
How to use Boost in Visual Studio 2010 http://stackoverflow.com/questions/2629421/how-to-use-boost-in-visual-studio-2010 into a directory of your choice e.g. C boost_1_47_0 . Start the Visual Studio Command Prompt for the platform of your choice..
Why do we actually need Private or Protected inheritance in C++? http://stackoverflow.com/questions/374399/why-do-we-actually-need-private-or-protected-inheritance-in-c class Engine public Engine int numCylinders void start Starts this Engine class Car public Car e_ 8 Initializes this Car.. Initializes this Car with 8 cylinders void start e_.start Start this Car by starting its Engine private Engine e_ Car has a.. Initializes this Car with 8 cylinders using Engine start Start this Car by starting its Engine However this way of doing has..
When to use pointers and when not to? http://stackoverflow.com/questions/397263/when-to-use-pointers-and-when-not-to Foo Bar b java c pointers share improve this question Start by avoiding pointers. Use them when You want to use the Pimpl..
Singleton instance declared as static variable of GetInstance method http://stackoverflow.com/questions/449436/singleton-instance-declared-as-static-variable-of-getinstance-method this up SomeBaseClass SomeClass GetInstance #ifdef _WIN32 Start Critical Section Here #elif defined __GNUC__ __GNUC__ 3 You..
error LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup http://stackoverflow.com/questions/4845410/error-lnk2019-unresolved-external-symbol-main-referenced-in-function-tmainc external symbol _main referenced in function ___tmainCRTStartup I don't know what's wrong with it.. I can't find where the.. sequence is empty sequence sequence used current_index 0 Start the iteration void sequence start current_index 0 Iterate..
The Best Place to Start Learning C++ [closed] http://stackoverflow.com/questions/525726/the-best-place-to-start-learning-c Best Place to Start Learning C closed So I have been a .Net developer for the past..
How can I create cartesian product of vector of vectors? http://stackoverflow.com/questions/5279051/how-can-i-create-cartesian-product-of-vector-of-vectors Vvi out final result Vvi in final result Vd vd Start all of the iterators at the beginning. for Vvi const_iterator..
Testing pointers for validity (C/C++) http://stackoverflow.com/questions/551069/testing-pointers-for-validity-c-c you would still slip into a bug and not fail fast. Start using null pointers for signaling this kind of thing and tell..
Developing Internet Explorer Extensions? http://stackoverflow.com/questions/5643819/developing-internet-explorer-extensions Sign the assembly with a strong key In the Debug tab set Start External Program to C Program Files x86 Internet Explorer iexplore.exe..
List of C++ name resolution (and overloading) rules http://stackoverflow.com/questions/7374588/list-of-c-name-resolution-and-overloading-rules do not apply. Do this in addition to unqualified lookup. Start with unqualified lookup if argument dependent lookup doesn't.. doesn't apply. This is the usual way variables are found. Start at the current scope and work outwards until the name is found...
“string could not resolved” error in eclipse for C++ http://stackoverflow.com/questions/7905025/string-could-not-resolved-error-in-eclipse-for-c and Symbols C Run Right click on Project Index Rebuild Start from step 1 if there are any unresolved symbols left. share..
Copy a file in an sane, safe and efficient way http://stackoverflow.com/questions/10195343/copy-a-file-in-an-sane-safe-and-efficient-way clock cout CLOCKS_PER_SEC CLOCKS_PER_SEC n cout CPU TIME START start n cout CPU TIME END end n cout CPU TIME END START end.. START start n cout CPU TIME END end n cout CPU TIME END START end start n cout TIME SEC static_cast double end start CLOCKS_PER_SEC.. clock cout CLOCKS_PER_SEC CLOCKS_PER_SEC n cout CPU TIME START start n cout CPU TIME END end n cout CPU TIME END START end..
Problem to Decode H264 video over RTP with ffmpeg (libavcodec) http://stackoverflow.com/questions/3493742/problem-to-decode-h264-video-over-rtp-with-ffmpeg-libavcodec IDR. One fragment can look like this Fragment that has START BIT 1 First byte 3 NAL UNIT BITS 5 FRAGMENT TYPE BITS Second.. byte 3 NAL UNIT BITS 5 FRAGMENT TYPE BITS Second byte START BIT END BIT RESERVED BIT 5 NAL UNIT BITS Other bytes ... IDR..
C++ global initialization order ignores dependencies? http://stackoverflow.com/questions/3746238/c-global-initialization-order-ignores-dependencies Foo add n static int addToGlobal printf Foo addToGlobal START n globalFoo.add printf Foo addToGlobal END n return 0 Foo globalFoo.. 0 The above prints with gcc 4.4.3 Foo Foo Foo addToGlobal START Foo add Foo addToGlobal END main This is what I expect and seems.. the program outputs the following Foo addToGlobal START Foo add Foo addToGlobal END Foo Foo main It seems instance methods..
C++ Rewrite a file but leaving out everything before a word http://stackoverflow.com/questions/6404352/c-rewrite-a-file-but-leaving-out-everything-before-a-word want to read a file then remove everything before the word START and rewrite the file with the rest. Here's the code I've got.. cannot read a file then remove everything before the word START and rewrite the file with the rest except in memory as answered.. string line while getline in line size_t pos line.find START if pos string npos string remain line.substr pos 11 if remain.size..
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