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c++ Programming Glossary: actualWhat is the difference between NULL, '\0' and 0 http://stackoverflow.com/questions/1296843/what-is-the-difference-between-null-0-and-0 to a null pointer. It is implementation defined what the actual definition of NULL is as long as it is a valid null pointer..
What is the difference between a definition and a declaration? http://stackoverflow.com/questions/1410563/what-is-the-difference-between-a-definition-and-a-declaration foo no extern allowed for class declarations A definition actually instantiates implements this identifier. It's what the linker.. in C . Thanks to litb Johannes Schaub who dug out the actual chapter and verse in one of his answers. share improve this..
Programmatically find the number of cores on a machine http://stackoverflow.com/questions/150355/programmatically-find-the-number-of-cores-on-a-machine is more of a curiosity question than something that needs actual solving but is there a way to determine how many cores a machine..
Do-While and if-else statements in C/C++ macros http://stackoverflow.com/questions/154136/do-while-and-if-else-statements-in-c-c-macros at this point that it would be better to declare BAR as an actual function not a macro. In summary the do ... while is there to..
Why does an overridden function in the derived class hide other overloads of the base class? http://stackoverflow.com/questions/1628768/why-does-an-overridden-function-in-the-derived-class-hide-other-overloads-of-the never asked about but nobody seems to care to address the actual why question. The decision the rationale behind the name hiding.. decision the rationale behind the name hiding i.e. why it actually was designed into C is to avoid certain counterintuitive unforeseen..
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 to static_cast down a hierarchy to a type that isn't actually the type of the object. const_cast can be used to remove or.. and bit manipulations like turning a raw data stream into actual data or storing data in the low bits of an aligned pointer...
http://stackoverflow.com/questions/4421706/operator-overloading wonder since operators are merely syntactic sugar their actual work could be done by and often is forwarded to plain functions... is this inline bool operator const X lhs const X rhs do actual comparison inline bool operator const X lhs const X rhs return.. lhs rhs inline bool operator const X lhs const X rhs do actual comparison inline bool operator const X lhs const X rhs return..
What's this STL vs. “C++ Standard Library” fight all about? [closed] http://stackoverflow.com/questions/5205491/whats-this-stl-vs-c-standard-library-fight-all-about of the C Standard Template Library rather backwards to actual history in the same way that your Microsoft Visual Studio or..
What are the barriers to understanding pointers and what can be done to overcome them? http://stackoverflow.com/questions/5727/what-are-the-barriers-to-understanding-pointers-and-what-can-be-done-to-overcome address on it and the memory block it references as the actual house. All sorts of operations can thus be easily explained... the same manner unless you can explicitly detect that it's actually just one house. Note This is usually the concept that I have.. 0 h1 4 h2 23 Which means that our linked list above might actuall look like this h1 4 h2 28 v v ttttNNNNNNNNNNLLLL ttttNNNNNNNNNNLLLL..
Is there a way to instantiate objects from a string holding their class name? http://stackoverflow.com/questions/582331/is-there-a-way-to-instantiate-objects-from-a-string-holding-their-class-name etc. Is there a way to somehow convert this string to an actual type class so that BaseFactory wouldn't have to know all the..
http://stackoverflow.com/questions/589575/size-of-int-long-etc of type is still valid e.g. sizeof int sizeof long . The actual implementation specific ranges can be found in limits.h header..
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 UnionNode T void holds a void which contains the actual data and an index to store the current type. For quite a few.. U that should only be instantiated for types that could actually be in the union. Trying to cast a Union bool float to std.. function 0 int main int f 0 boost function int f That's actually a valid expression It compares boost function with zero int..
Where do I find the current C or C++ standard documents? http://stackoverflow.com/questions/81656/where-do-i-find-the-current-c-or-c-standard-documents 's book The Annotated ANSI Standard at Amazon contains the actual text of the standard. As mentioned in several answers here the.. of the standards you should really get a copy of the actual documents especially if you're planning on quoting them as references...
Heisenbug: WinApi program crashes on some computers http://stackoverflow.com/questions/132116/heisenbug-winapi-program-crashes-on-some-computers a RELEASE configruation 1. Initialization of globals 2. Actual machine Code generated etc.. So first step is find out what..
Order of evaluation of elements in list-initialization http://stackoverflow.com/questions/14060264/order-of-evaluation-of-elements-in-list-initialization A1 A2 test A1 A2 ss Expected output A1 data A1 A2 data A2 Actual Output A1 data A2 A2 data A1 Did I do anything wrong in my test..
How to define different types for the same class in C++ http://stackoverflow.com/questions/14232293/how-to-define-different-types-for-the-same-class-in-c for large classes. Here it is applied to the above example Actual `Fruit` class remains unchanged except for template declaration..
http://stackoverflow.com/questions/17139974/convert-raw-pcm-to-flac 4 data int chunkSize length of data char data struct Wave Actual structure of a PCM WAVE file Riff riffHeader Format formatHeader..
Instantiating classes by name with factory pattern http://stackoverflow.com/questions/1832003/instantiating-classes-by-name-with-factory-pattern registered else return i second template class Base class Actual static std auto_ptr Base create_func return std auto_ptr Base.. std auto_ptr Base create_func return std auto_ptr Base new Actual private typedef std map Key Creator Registry Registry _registry..
Does this type of memory get allocated on the heap or the stack? http://stackoverflow.com/questions/426737/does-this-type-of-memory-get-allocated-on-the-heap-or-the-stack on the stack x sizeof int sizeof int 100 is on the heap y Actual sizes may differ slightly due to class struct alignment depending..
constructor invocation mechanism http://stackoverflow.com/questions/4283576/constructor-invocation-mechanism int main my m 1 my n my 2 Expected output 1 Default 2 Copy Actual output What's wrong with my understanding of the constructor..
How do you serialize an object in C++? http://stackoverflow.com/questions/523872/how-do-you-serialize-an-object-in-c int d int m float s degrees d minutes m seconds s Actual serialization is then pretty easy #include fstream std ofstream..
How do I expand a tuple into variadic template function's arguments? http://stackoverflow.com/questions/687490/how-do-i-expand-a-tuple-into-variadic-template-functions-arguments Function Call Forwarding Using Tuple Pack Parameters Actual apply function template typename T typename... ArgsF typename..... Function Call Forwarding Using Tuple Pack Parameters Actual apply function template typename... ArgsF typename... ArgsT..
C++: What is the printf() format spec for “float”? http://stackoverflow.com/questions/7197589/c-what-is-the-printf-format-spec-for-float sizeof m_acDiag 1 add Arg1 Arg2 arg1 g arg2 g Expected g Actual g Result s a1 a2 e c BOOL_PF m_b else ... Pretty ugly isn't..
how to achieve 4 FLOPs per cycle http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle SSE peak is 4 flops 4 cores 4.4 GHz 70.4 GFlops. Actual is 65.5 GFlops . Let's take this one step further. AVX... #include.. Theoretical AVX peak is 8 flops 4.4 GHz 35.2 GFlops . Actual is 33.4 GFlops . Output 8 threads 10000000 iterations Compiled.. AVX peak is 8 flops 4 cores 4.4 GHz 140.8 GFlops. Actual is 138.2 GFlops . Now for some explanations The performance..
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