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c++ Programming Glossary: itWhat can I use to profile C++ code in Linux? http://stackoverflow.com/questions/375913/what-can-i-use-to-profile-c-code-in-linux manually interrupt your program under the debugger while it's being subjectively slow there's a simple way to find performance.. a simple way to find performance problems. Just halt it several times and each time look at the call stack. If there.. of the time 20 or 50 or whatever that is the probability that you will catch it in the act on each sample. So that is..
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.. with value semantics . This means that objects are implicitly copied in various contexts and we should understand what copying.. by the name name age age part this is called a member initializer list . Special member functions What does it mean to..
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 under Ox . Intel Compiler 11 does something miraculous. It interchanges the two loops thereby hoisting the unpredictable..
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 stage of compilation most commonly referred to as linking. It basically means that you compiled a bunch of implementation..
What is this weird colon-member syntax in the constructor? http://stackoverflow.com/questions/1711990/what-is-this-weird-colon-member-syntax-in-the-constructor .bar std endl return 0 What does this strange bar num mean It somehow seems to initialize the member variable but I've never.. member variable but I've never seen this syntax before. It looks like a function constructor call but for an int Makes.. c faq ctor initializer share improve this question It's a member initialization list . You should find information..
Undefined, unspecified and implementation-defined behavior http://stackoverflow.com/questions/2397984/undefined-unspecified-and-implementation-defined-behavior once you invoke undefined behavior even nasal demons . It does not matter what the correct behavior is according to your..
http://stackoverflow.com/questions/3106110/what-is-move-semantics a copy here we call this constructor a move constructor . Its job is to move resources from one object to another instead.. since the heap data didn't have to be copied just moved. It wasn't necessary to copy it because x y is an rvalue and again.. pointer and then set the pointer in the source to null. It is okay to nullify the source object in this manner because..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom rarely occurs so most of the time this check is a waste. It would be better if the operator could work properly without..
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 problems and the opportunity to get speedup . Added It might not be obvious but the stack sampling technique works.. occur within a sample. Another objection I often hear is It will stop someplace random and it will miss the real problem..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points to determine the value to be stored. What does it mean It means if an object is written to within a full expression any..
http://stackoverflow.com/questions/4421706/operator-overloading actual comparison with this Note the const at the end. 2 It should be noted that the built in version of and use shortcut.. operator which must be implemented as a class member. It is used for container like types that allow access to their.. never be overloaded. For operator see this question . It's rarely used and thus rarely ever overloaded. In fact even..
Why is iostream::eof inside a loop condition considered wrong? http://stackoverflow.com/questions/5605125/why-is-iostreameof-inside-a-loop-condition-considered-wrong eof will only be set after reading the end of the stream. It does not indicate that the next read will be the end of the..
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 the rules by whether a construct is dependent or not. It separates them into logically different groups One catches types.. 0 boost function int f That's actually a valid expression It compares boost function with zero int and then compares the.. doesn't always have to appear in the last part of a name. It can appear in the middle before a class name that's used as..
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 break the rules of the system. C is not a safe language . It will cheerfully allow you to break the rules of the system... pushed on it is going to be the last thing popped off. It's like the hotel decides to only rent out rooms sequentially.. use a stack for storage of locals it could use the heap. It doesn't because that would make the program slower. An implementation..
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 should go ahead and use the drafts if strapped for cash. It appears that if you are willing and able to wait a few months..
http://stackoverflow.com/questions/1044103/debugbreak-not-breaking me before checking for solution Although this is more of IT solution question I've been plagued with this problem all day..
http://stackoverflow.com/questions/14932315/how-to-compile-qt-5-under-windows-or-linux-32-or-64-bit-static-or-dynamic-on-v C Qt Qt5.2 qtbase . 7 Only for Windows DO YOU REALLY WANT IT TOTALLY STATIC Usually even if you choose the compilation to.. lines QMAKE_CFLAGS_RELEASE O2 MD QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO O2 MD Zi QMAKE_CFLAGS_DEBUG Zi MDd to QMAKE_CFLAGS_RELEASE.. Zi MDd to QMAKE_CFLAGS_RELEASE O2 MT QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO O2 MT Zi QMAKE_CFLAGS_DEBUG Zi MTd 8 Start the terminal..
Function Pointers in Objective C http://stackoverflow.com/questions/1777486/function-pointers-in-objective-c that C method would need to be part of the class SO THAT IT CAN ACCESS THE INSTANCE FIELDS . I don't know how to make a.. consumes a pointer of said callback function type void APIThatWillCallBack int f1 int f2 CallBackFuncType callback void.. callbackContext MyCallbackObjectClass new APIThatWillCallBack 17 42 MyCallbackDude void callbackContext If..
C++ Static member method call on class instance http://stackoverflow.com/questions/325555/c-static-member-method-call-on-class-instance class Test public static void DoCrash std cout TEST IT std endl int main Test k k.DoCrash calling a static method like.. SP1 vc9 it compiles fine the console just diplay TEST IT . As far as i know static member methods shouldn't be called..
Undefined reference to template members http://stackoverflow.com/questions/4100893/undefined-reference-to-template-members stack ... ... Maze.cpp #include Maze.h ... ... Maze Maze IT SHOWS THAT THE FOLLOWING LINE HAS AN ERROR stack new Stack Coordinate..
Again - parallax mapping issue in OpenGL, GLSL. It's not as usual as it seem to be http://stackoverflow.com/questions/4750707/again-parallax-mapping-issue-in-opengl-glsl-its-not-as-usual-as-it-seem-to image seem to present a good parallax mapped cube IM SURE IT IS NOT A TANGENT VECTOR OR TEXTURE COORDINATES PROBLEM Because.. GL_UNSIGNED_BYTE surface pixels BEWARE I'm now using HBITMAP based texture loading taken from dhpoware demo which I was..
Need help in reading JPEG file using libjpeg http://stackoverflow.com/questions/5616216/need-help-in-reading-jpeg-file-using-libjpeg by line while cinfo.output_scanline cinfo.output_height IT ALWAYS crash ON THIS JPEG_READ_SCANLINES FUNCTION CALL BELOW..
Boost Static Assertion for Type Comparision http://stackoverflow.com/questions/6642050/boost-static-assertion-for-type-comparision cant get my type comparision to work under NVCC Any ideas IT SEEMS THAT MSVC which is routed to by NVCC has its problems.. its problems as well with the above version.... hm... EDIT HERE A SNIPPET WHICH DOES NOT WORK IN MSVC This snipped should..
Move semantics & returning const values http://stackoverflow.com/questions/7138780/move-semantics-returning-const-values sep THE FOLLOWING WORKS BUT I THINK THAT IS ACCIDENTAL IT CALLS c_str std string const BUT I THINK THE TEMPORARY RETURNED..
How to differentiate (when overloading) between prefix and postfix forms of operator++? (C++) http://stackoverflow.com/questions/894804/how-to-differentiate-when-overloading-between-prefix-and-postfix-forms-of-oper operator stuff But when I try to do list int iterator IT IT I get a warning about there being no postifx using prefix.. operator stuff But when I try to do list int iterator IT IT I get a warning about there being no postifx using prefix form...
Unique class type Id that is safe and holds across library boundaries http://stackoverflow.com/questions/922442/unique-class-type-id-that-is-safe-and-holds-across-library-boundaries static int s_id return id unique for DERIVED NOT SURE IT WILL BE REALLY UNIQUE FOR EACH CLASS static const int id reinterpret_cast..
http://stackoverflow.com/questions/981787/good-portable-simd-library math libraries include uBLAS from Boost Armadillo Eigen IT and Newmat. The POOMA library probably also includes some of..
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