¡@
c++ Programming Glossary: there'sWhy 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 calls to foo NULL are resolved to B foo void . Let's say there's no name hiding and this B foo void is visible in many different..
http://stackoverflow.com/questions/1647631/c-state-machine-design they all follow the same form and take no parameters there's use made of global variables for information passing where necessary...
What uses are there for “placement new”? http://stackoverflow.com/questions/222557/what-uses-are-there-for-placement-new simply when performance and exception safety are paramount there's no danger of allocation failure since the memory has already..
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 function is static it's technically undefined as well but there's some dispute. The first thing to understand is why it's undefined.. undefined behavior to dereference a null pointer. In C 03 there's actually a bit of ambiguity here. Although dereferencing a null.. is called. There is no lvalue to rvalue conversion so there's no undefined behavior. In C 0x as of n3126 the ambiguity remains...
How to stop C++ console application from exiting immediately? http://stackoverflow.com/questions/2529617/how-to-stop-c-console-application-from-exiting-immediately won't work if there are characters buffered in stdin and there's really no good way to work around that. If you're running with..
Regular cast vs. static_cast vs. dynamic_cast http://stackoverflow.com/questions/28002/regular-cast-vs-static-cast-vs-dynamic-cast I've been writing C and C code for almost twenty years but there's one aspect of these languages that I've never really understood...
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 under the debugger while it's being subjectively slow there's a simple way to find performance problems. Just halt it several..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points as above i parsed as i i i i i Undefined Behaviour because there's no sequence point between ` i` right most and assignment to.. ends up being stored in i which happens over in i and so there's no good way to define either for our understanding or the compiler's..
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 has Examples struct POD int x char y void f no harm if there's a function static std vector char v static members do not matter..
What is the proper declaration of main? http://stackoverflow.com/questions/4207134/what-is-the-proper-declaration-of-main an environment where you have a full standard library and there's an OS running your program . It is also possible to compile..
Pretty-print C++ STL containers http://stackoverflow.com/questions/4850473/pretty-print-c-stl-containers delimiters dynamically at runtime but it also means that there's no unneeded overhead. An object based delimiter configuration..
http://stackoverflow.com/questions/485525/round-for-float-in-c round double d return floor d 0.5 The probable reason there's no round in the C std library is that it can in fact be implemented..
What does T&& (double ampersand) mean in C++11? http://stackoverflow.com/questions/5481539/what-does-t-double-ampersand-mean-in-c11 of the resources the temporary already allocated In C 03 there's no way to prevent the copy as we cannot determine we were passed..
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 does the address go end After this method has executed there's no place in our variables that the address to the house exists..
Do the parentheses after the type name make a difference with new? http://stackoverflow.com/questions/620137/do-the-parentheses-after-the-type-name-make-a-difference-with-new C which calls the default ctor. So in all versions of C there's a difference between new A and new A because A is a POD. And.. difference between new A and new A because A is a POD. And there's a difference in behavior between C 98 and C 03 for the case..
Why should `new` be used as little as possible? http://stackoverflow.com/questions/6500313/why-should-new-be-used-as-little-as-possible block. Why dynamic allocation is often unnecessary. In C there's a neat construct called a destructor . This mechanism allows..
Is ncurses available for windows? http://stackoverflow.com/questions/138153/is-ncurses-available-for-windows console mode c c ncurses share improve this question There's an ongoing effort for a PDCurses port http www.mail archive.com..
Easy way to use variables of enum types as string in C? http://stackoverflow.com/questions/147267/easy-way-to-use-variables-of-enum-types-as-string-in-c c c enums preprocessor share improve this question There's no built in solution. Easiest way is with an array of char where..
cout << order of call to functions it prints? http://stackoverflow.com/questions/2129230/cout-order-of-call-to-functions-it-prints the way it behaves c cout share improve this question There's no sequence point with the operator so the compiler is free..
How to pass objects to functions in C++? http://stackoverflow.com/questions/2139224/how-to-pass-objects-to-functions-in-c because passing by value always creates a copy in C 03 There's more to this but these few beginner's rules will get you quite..
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 layer of any thickness and emulate absolutely anything. There's nothing to prevent a C or C implementation from implementing..
What do 'statically linked' and 'dynamically linked' mean? http://stackoverflow.com/questions/311882/what-do-statically-linked-and-dynamically-linked-mean one on disk. It's basically a method of deferred linking. There's an even more deferred method called late binding on some systems..
http://stackoverflow.com/questions/313970/stl-string-to-lower-case to get away with not iterating through each character. There's no way to know whether the character is lowercase or uppercase..
Why does C++ not have reflection? http://stackoverflow.com/questions/359237/why-does-c-not-have-reflection jump assembler instructions and a lot of stack push pop's. There's not much to go on when adding such metadata. But like I said..
Combining C++ and C - how does #ifdef __cplusplus work? http://stackoverflow.com/questions/3789340/combining-c-and-c-how-does-ifdef-cplusplus-work or templates for example. extern C blocks nest nicely. There's also extern C if you find yourself hopelessly trapped inside..
Can someone explain this template code that gives me the size of an array? http://stackoverflow.com/questions/437150/can-someone-explain-this-template-code-that-gives-me-the-size-of-an-array Which can be used like this size_t size_of_a array_size a There's a variation i made up some time ago Edit turns out someone already..
http://stackoverflow.com/questions/4421706/operator-overloading users code will behave surprisingly. Assignment Operator There's a lot to be said about assignment. However most of it has already..
http://stackoverflow.com/questions/485525/round-for-float-in-c c floating point rounding share improve this question There's no round in the C std library. You can write one yourself though..
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 and the example memory layouts are vastly simplified. There's more overhead and a lot more details you would need to know..
What are the differences between pointer variable and reference variable in C++? http://stackoverflow.com/questions/57483/what-are-the-differences-between-pointer-variable-and-reference-variable-in-c take the address of a reference like you can with pointers There's no reference arithmetics but you can take the address of an..
“using namespace” in c++ headers http://stackoverflow.com/questions/5849457/using-namespace-in-c-headers of code in any other files that include that header. There's no way to undo a using namespace which is another reason it's..
What's the best Free C++ Profiler for Windows? http://stackoverflow.com/questions/67554/whats-the-best-free-c-profiler-for-windows AMD Code Analyst is free but not as advanced as VTune. There's also Sleepy which is very simple but does the job in many cases...
OpenCV 2.3 C++ Visual Studio 2010 http://stackoverflow.com/questions/7011238/opencv-2-3-c-visual-studio-2010 cannot open file 'c OpenCV2.3 build x86 vc10 lib.obj' There's no lib.obj in OpenCV folders. I've only unziped OpenCV 2.3.0..
Sleep less than one millisecond http://stackoverflow.com/questions/85122/sleep-less-than-one-millisecond The parameter you pass is a minimum time for sleeping. There's no guarantee that the thread will wake up after exactly the..
What is “rvalue reference for *this”? http://stackoverflow.com/questions/8610571/what-is-rvalue-reference-for-this couldn't find much resources on the web using the terms. There's a link to the proposal paper on the page N2439 Extending move..
Why does the use of 'new' cause memory leaks? http://stackoverflow.com/questions/8839943/why-does-the-use-of-new-cause-memory-leaks exists in the standard library called std unique_ptr . There's also an old one pre C 11 named auto_ptr but it's now deprecated..
|