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c++ Programming Glossary: with

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

a C identifier It's common in C to name member variables with some kind of prefix to denote the fact that they're member variables.. for use as implementation macros identifiers beginning with an underscore and an uppercase letter identifiers containing.. Reserved in the global namespaces identifiers beginning with an underscore Also everything in the std namespace is reserved...

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

it regardless of the number of times it may occur within a sample. Another objection I often hear is It will stop someplace.. way to answer is to say that it's a Beta distribution with average value number of hits 1 number of tries 2 2 1 2 2 75.. cost of instructions that it sees. And it will see them with a frequency on average proportional to their cost. If n samples..

What is The Rule of Three?

http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three

Introduction C treats variables of user defined types with value semantics . This means that objects are implicitly copied.. is already in some valid state that needs to be dealt with. Since we declared neither the copy constructor nor the assignment.. destructor and destroying any automatic objects allocated within the body a destructor for class X calls the destructors for..

Undefined Behavior and Sequence Points

http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points

answer is very likely to get read by those who came up with the idea. c c undefined behavior c faq sequence points share.. function invocation and the operands form an argument list without an implied sequence point between them. What is Undefined.. behavior ranges from ignoring the situation completely with unpredictable results to behaving during translation or program..

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

instantiating a template the compiler creates a new class with the given template argument. For example template typename T.. to the implementation of the methods to instantiate them with the template argument in this case int . If these implementations.. template class Foo float You will only be able to use Foo with int or float If my explanation isn't clear enough you can have..

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

to manage the lifetime of the object being pointed to. With bare C pointers the programmer has to explicitly destroy the..

Why 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

for unsigned c 0 c arraySize c data c std rand 256 With this the next loop runs faster std sort data data arraySize.. std cout elapsedTime std endl std cout sum sum std endl Without std sort data data arraySize the code runs in 11.54 seconds... sort data data arraySize the code runs in 11.54 seconds. With the sorted data the code runs in 1.93 seconds. Initially I thought..

Is gcc4.7 buggy about regular expressions? [duplicate]

http://stackoverflow.com/questions/12530406/is-gcc4-7-buggy-about-regular-expressions

software. No one is held accountable for errors. With all due respect you don't know what you're talking about. When.. to work on libstdc 's regex anyway. Should just be absent. With hindsight probably yes. But there are exported symbols from..

Benefits of Initialization lists

http://stackoverflow.com/questions/1598967/benefits-of-initialization-lists

the compiler does not make a separate copy of the object. With the other style the expression whatever causes a separate temporary..

Why use pointers? [closed]

http://stackoverflow.com/questions/162941/why-use-pointers

not go into that here. How do you use pointers with arrays With little effort and much confusion. If we talk about simple data.. we are telling printf that we want to print a character. Without the the character representation of the memory address itself..

Default constructor with empty brackets

http://stackoverflow.com/questions/180172/default-constructor-with-empty-brackets

T v std istream_iterator T ifs std istream_iterator T With this there is no way it could be interpreted as a function declaration...

Static linking vs dynamic linking

http://stackoverflow.com/questions/1993390/static-linking-vs-dynamic-linking

compiler can optimize both your code and the library code. With dynamic linking only your code can be optimized. If most of..

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

X or of a type derived from X the behavior is undefined. With static functions the strict versus weak interpretation makes..

What is the copy-and-swap idiom?

http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom

we are now ready to implement the copy and swap idiom. Without further ado our assignment operator is dumb_array operator.. other 1 swap this other 2 return this And that's it With one fell swoop all three problems are elegantly tackled at once...

When do I use a dot, arrow, or double colon to refer to members of a class in C++?

http://stackoverflow.com/questions/4984600/when-do-i-use-a-dot-arrow-or-double-colon-to-refer-to-members-of-a-class-in-c

is whatever the class designer implemented. To conclude With a b if a is a pointer b will be a member of the object the pointer..

Type erasure techniques

http://stackoverflow.com/questions/5450159/type-erasure-techniques

erasure techniques With type erasure I mean hiding some or all of the type information..

Polymorphism in c++

http://stackoverflow.com/questions/5854581/polymorphism-in-c

C features to the Comp. Sci. terminology. Discussion With the C Standard using a narrower definition of polymorphism than.. for either int or double and work as intended. Without these features we'd need explicit casts type traits and or..

When should I use the new keyword in C++?

http://stackoverflow.com/questions/655065/when-should-i-use-the-new-keyword-in-c

the new keyword. Simply should I be using it or not 1 With the new keyword... MyClass myClass new MyClass myClass MyField.. MyClass myClass new MyClass myClass MyField Hello world 2 Without the new keyword... MyClass myClass myClass.MyField Hello..

Why do all these crazy function pointer definitions all work? What is really going on?

http://stackoverflow.com/questions/6893285/why-do-all-these-crazy-function-pointer-definitions-all-work-what-is-really-goi

noticed that I had typed get_token instead of get_token . With the error the program still compiled but it did nothing. Easy..

how to achieve 4 FLOPs per cycle

http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle

arrange additions and multiplications in groups of three. With g O2 march nocona addmul_unroll.cpp I get at best 0.207s 4.825..

Downloading and integrating Qt5 with Visual Studio 2012

http://stackoverflow.com/questions/15826893/downloading-and-integrating-qt5-with-visual-studio-2012

user who has installed the Avast autosandbox feature EVEN WITH AUTO SANDBOXING TURNED OFF. THE ONLY WAY TO OVERCOME THIS ISSUE..

Smart pointer wrapping penalty. Memoization with std::map

http://stackoverflow.com/questions/15963563/smart-pointer-wrapping-penalty-memoization-with-stdmap

reference counting it would be faster even more. LIVE DEMO WITH ASM OUTPUT #define NDEBUG #include boost make_shared.hpp #include..

window border width and height in Win32 - how do I get it?

http://stackoverflow.com/questions/431470/window-border-width-and-height-in-win32-how-do-i-get-it

space at the bottom. But MoveWindow needs the dimensions WITH the border space added in. SOMEbody must have done this before.....

Convert QString into QByteArray with either UTF-8 or Latin1 encoding

http://stackoverflow.com/questions/5288959/convert-qstring-into-qbytearray-with-either-utf-8-or-latin1-encoding

u00fc dbg xc3 xbc QString xc3 xbc dbg LATIN SMALL LETTER U WITH DIAERESIS QString ΓΌ qDebug n2. Using QString fromUtf8 char const.. xc3 xbc QString fromUtf8 xc3 xbc dbg LATIN SMALL LETTER U WITH DIAERESIS QString fromUtf8 ΓΌ qDebug n3. Using QString fromLocal8Bit.. xbc QString fromLocal8Bit xc3 xbc dbg LATIN SMALL LETTER U WITH DIAERESIS QString fromLocal8Bit ΓΌ return app.exec Output on..