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c++ Programming Glossary: useWhat 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 If you've come from an MFC background you'll probably use m_foo . I've also seen myFoo occasionally. C# or possibly just.. did not change in C 11 Reserved in any scope including for use as implementation macros identifiers beginning with an underscore.. letter 2.11 is reserved to the implementation for any use. Each name that begins with an underscore is reserved to the..
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.. I'm in the process of optimizing. What tool can I use to pinpoint my slow code c unix profiling share improve this.. share improve this question If your goal is to use a profiler use one of the suggested ones. However if you're..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points between Undefined Behaviour and Sequence Points I often use funny and convoluted expressions like a i i to make myself feel.. indicated are the built in operators as described in clause 5. When one of these operators is overloaded clause 13 in a.. in clause 5. When one of these operators is overloaded clause 13 in a valid context thus designating a user defined operator..
Why can templates only be implemented in the header file? http://stackoverflow.com/questions/495021/why-can-templates-only-be-implemented-in-the-header-file c templates c faq share improve this question Because when instantiating a template the compiler creates a new class.. Foo int template class Foo float You will only be able to use Foo with int or float If my explanation isn't clear enough you..
What is a smart pointer and when should I use one? http://stackoverflow.com/questions/106508/what-is-a-smart-pointer-and-when-should-i-use-one some goal MyObject ptr new MyObject ptr DoSomething Use the object in some way. delete ptr Destroy the object. Done.. it. SomeSmartPtr MyObject ptr new MyObject ptr DoSomething Use the object in some way. Destruction of the object happens depending.. boost scoped_ptr MyObject ptr new MyObject ptr DoSomethingUseful boost scopted_ptr goes out of scope the MyObject is automatically..
How to pass objects to functions in C++? http://stackoverflow.com/questions/2139224/how-to-pass-objects-to-functions-in-c base classes in which case you need to pass by reference . Use the previous rules to determine whether to pass by const reference..
Is there a performance difference between i++ and ++i in C++? http://stackoverflow.com/questions/24901/is-there-a-performance-difference-between-i-and-i-in-c share improve this question Executive Summary Use i if you don't have a specific reason to use i . For C the answer..
How do you set, clear and toggle a single bit in C/C++? http://stackoverflow.com/questions/47981/how-do-you-set-clear-and-toggle-a-single-bit-in-c-c embedded share improve this question Setting a bit Use the bitwise OR operator to set a bit. number 1 x That will set.. set a bit. number 1 x That will set bit x . Clearing a bit Use the bitwise AND operator to clear a bit. number ~ 1 x That will..
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 because they are non standard and therefore not portable. Use string streams #include sstream include this to use string streams.. with std ostrstream . The latter is deprecated Use boost lexical cast . If you are not familiar with boost it is.. converts double f atof sf.c_str std string to const char Use string streams this time input string stream istringstream ...
When to use forward declaration? http://stackoverflow.com/questions/553682/when-to-use-forward-declaration X X X f4 X f5 What you cannot do with an incomplete type Use it as a base class class Foo X compiler error Use it to declare.. type Use it as a base class class Foo X compiler error Use it to declare a member class Foo X m compiler error Define functions.. this type void f1 X x compiler error X f2 compiler error Use its methods or fields in fact trying to dereference a variable..
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 reference occupies same amount of memory As a general rule Use references in function parameters and return types to define.. and return types to define attractive interfaces. Use pointers to implement algorithms and data structures. Interesting..
WChars, Encodings, Standards and Portability http://stackoverflow.com/questions/6300804/wchars-encodings-standards-and-portability conversion that will map to all possible 16 bit strings. Use of the Windows specific _wfopen may be required. As a corollary.. directory manipulation. This is certainly not idiomatic . Use the Microsoft extensions or wrappers like Boost.Filesystem or..
Singleton: How should it be used http://stackoverflow.com/questions/86582/singleton-how-should-it-be-used question All of you are wrong. Read the question. Answer Use a Singleton if If you need to have one and only one object of..
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 be done with the library then post its implementation . USE CASES Here is an example of how the for_each_in_arg_pack function..
Symbol not found when using template defined in a library http://stackoverflow.com/questions/18543980/symbol-not-found-when-using-template-defined-in-a-library lib stuff which the linker will find itself In closing USE HEADER GUARDS and with templates put #include file.cpp at the..
Will a “variableName;” C++ statement be a no-op at all times? http://stackoverflow.com/questions/4030959/will-a-variablename-c-statement-be-a-no-op-at-all-times ignore it That is what we have now is this #define USE x void x use iid in an expression to get rid of warning but.. to get rid of warning but have no observable effect USE iid hm result of expression is gone but expression is still.. of expression is gone but expression is still evaluated USE std cout hmmm std endl This is close to a solution sizeof doesn't..
Best programming language and framework for cross platform desktop application development? [closed] http://stackoverflow.com/questions/4160162/best-programming-language-and-framework-for-cross-platform-desktop-application-d is NATIVE LOOK FEEL on both Windows Mac EASE OF USE I maybe wrong about Qt but I only tried it with Ruby and I couldn't..
Calling functions in a DLL from C++ http://stackoverflow.com/questions/539358/calling-functions-in-a-dll-from-c export decorated symbols then it is probably better to NOT USE the definition file approach. Here is an simple example on how..
Boost Static Assertion for Type Comparision http://stackoverflow.com/questions/6642050/boost-static-assertion-for-type-comparision IsSame _T OtherType Type1 Result value 1 1 USE HERE only result works BUT WHY int main cout IsSame OtherType..
How to properly use qRegisterMetaType on a class derived from QObject? http://stackoverflow.com/questions/7872578/how-to-properly-use-qregistermetatype-on-a-class-derived-from-qobject mName lol ClassA const ClassA other assert false DONT EVER USE THIS ~ClassA void ShowName std cout mName std endl std string..
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