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c++ Programming Glossary: eachIs there a difference in C++ between copy initialization and direct initialization? http://stackoverflow.com/questions/1051379/is-there-a-difference-in-c-between-copy-initialization-and-direct-initializati double b1 0.5 double b2 0.5 A c1 A c2 A A c3 A In each grouping are these statements identical Or is there an extra.. T t x T t x There is behavior we can attribute to each of them Direct initialization behaves like a function call to.. and got the following code to output different text for each of those forms without using the obvious through explicit constructors...
Why isn't sizeof for a struct equal to the sum of sizeof of each member? http://stackoverflow.com/questions/119123/why-isnt-sizeof-for-a-struct-equal-to-the-sum-of-sizeof-of-each-member isn't sizeof for a struct equal to the sum of sizeof of each member Why does the 'sizeof' operator return a size larger.. structure alignment is implementation defined. Therefore each compiler may choose to align data differently resulting in different..
What is an undefined reference/unresolved external symbol error and how do I fix it? http://stackoverflow.com/questions/12573816/what-is-an-undefined-reference-unresolved-external-symbol-error-and-how-do-i-fix in a character literal or a string literal as well as each escape sequence and universal character name in a character..
Best way to detect integer overflow in C/C++ http://stackoverflow.com/questions/199333/best-way-to-detect-integer-overflow-in-c-c over values of a and b and ran a digit counting routine each time on a b and a b to check if the digits condition was satisfied...
How to pass objects to functions in C++? http://stackoverflow.com/questions/2139224/how-to-pass-objects-to-functions-in-c It would be great if you could also explain where to use each of those options. c pointers pass by reference pass by value..
http://stackoverflow.com/questions/356950/c-functors-and-their-uses as efficient as if I had manually called the function on each value of the vector. If I had passed a function pointer instead..
http://stackoverflow.com/questions/3749099/why-should-the-implementation-and-the-declaration-of-a-template-class-be-in-the not just the signature in order to generate code for each instantiation of the template so you need to move the definitions..
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 find performance problems. Just halt it several times and each time look at the call stack. If there is some code that is wasting.. is the probability that you will catch it in the act on each sample. So that is roughly the percentage of samples on which.. 0.1 0.2 0.3 ... 0.9 1.0 and the prior probability of each of these possibilities is 0.1 so all of these costs are equally..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points int a 5 is a sequence point here in the evaluation of each of the following expressions after the evaluation of the first..
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 obj might be modified memcpy obj buf N at this point each subobject of obj of scalar type holds its original value goto..
http://stackoverflow.com/questions/4810664/how-do-i-use-arrays-in-c incompatible types that have absolutely nothing to do with each other. sizeof T n is equivalent to n sizeof T . Array to pointer.. to an array of 8 integers. int 8 is an array of 8 pointers each element of type int . Accessing elements C provides two syntactic..
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 standing... somewhere. After this code there is no way to reach that house and it will be left standing. In other words the.. than the first one. Also they're allocated right next to each other. Thus this code var h1 h2 THouse begin h1 THouse.Create..
Can a local variable's memory be accessed outside its scope? http://stackoverflow.com/questions/6441218/can-a-local-variables-memory-be-accessed-outside-its-scope some sort of long lived storage area where the lifetime of each byte in the storage that is the period of time when it is validly.. sort of short lived storage area where the lifetime of each byte in the storage is well known and in particular lifetimes..
http://stackoverflow.com/questions/11004273/what-is-stdpromise another and the internal detail of std async is another. Each of those can create a shared state and give you a std future..
Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513? http://stackoverflow.com/questions/11413855/why-is-transposing-a-matrix-of-512x512-much-slower-than-transposing-a-matrix-of with an 8kb cache 4 lines per set line size of 64 bytes. Each line can hold 8 of the elements in the matrix 64 bit int . The..
How do I build a GUI in C++? [closed] http://stackoverflow.com/questions/1186017/how-do-i-build-a-gui-in-c libraries just like you'd do with stdlib and printf . Each operating system comes with it's own GUI toolkit suite of header..
What is an undefined reference/unresolved external symbol error and how do I fix it? http://stackoverflow.com/questions/12573816/what-is-an-undefined-reference-unresolved-external-symbol-error-and-how-do-i-fix characters for end of line indicators if necessary. SNIP Each instance of a backslash character immediately followed by a.. and _Pragma unary operator expressions are executed. SNIP Each source character set member in a character literal or a string.. characters separating tokens are no longer significant. Each preprocessing token is converted into a token. 2.7 . The resulting..
What is the difference between #include <filename> and #include “filename”? http://stackoverflow.com/questions/21593/what-is-the-difference-between-include-filename-and-include-filename in the directive are processed just as in normal text. Each identifier currently defined as a macro name is replaced by..
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 signatures are always reserved to the implementation Each name that contains a double underscore _ _ or begins with an.. letter 2.11 is reserved to the implementation for any use. Each name that begins with an underscore is reserved to the implementation.. apply from the 1999 C Standard 7.1.3 Reserved identifiers Each header declares or defines all identifiers listed in its associated..
Undefined, unspecified and implementation-defined behavior http://stackoverflow.com/questions/2397984/undefined-unspecified-and-implementation-defined-behavior . These constitute the parameters of the abstract machine. Each implementation shall include documentation describing its characteristics..
Writing BMP image in pure c/c++ without other libraries http://stackoverflow.com/questions/2654480/writing-bmp-image-in-pure-c-c-without-other-libraries can be done without too much work. Bitmap File Structures Each bitmap file contains a bitmap file header a bitmap information..
http://stackoverflow.com/questions/5368862/why-do-multiple-inherited-functions-with-same-name-but-different-signatures-not that are so hidden are eliminated from consideration . Each of these declarations that was introduced by a using declaration..
How does photoshop blend two images together? http://stackoverflow.com/questions/5919663/how-does-photoshop-blend-two-images-together in image A against its corresponding pixel in image B. Each pixel is a color consisting of multiple channels. Assuming we..
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 typename U struct inUnion . The idea is simple I think Each UnionNode T Tail defines a template specialization inUnion T..
How does the compilation, linking process work? http://stackoverflow.com/questions/6264249/how-does-the-compilation-linking-process-work symbols contained within them with the correct addresses. Each of these symbols can be defined in other object files or in..
how to achieve 4 FLOPs per cycle http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle that it's broken into 4 blocks of 12 instructions each. Each of these 12 instructions blocks are completely independent from..
Why is one loop so much slower than two loops? http://stackoverflow.com/questions/8547778/why-is-one-loop-so-much-slower-than-two-loops xmm0 mmword ptr esi 18h addsd xmm0 mmword ptr eax 38h Each loop of the double loop example produces this code the following..
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