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c++ Programming Glossary: callWhy is “using namespace std;” considered bad practice? http://stackoverflow.com/questions/1452721/why-is-using-namespace-std-considered-bad-practice at all. But consider this You are using two libraries called Foo and Bar using namespace foo using namespace bar Everything.. foo using namespace bar Everything works fine you can call Blah from Foo and Quux from Bar without problems. But one day.. to a new version of Foo 2.0 which now offers a function called Quux . Now you've got a conflict Both Foo 2.0 and Bar import..
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 this syntax before. It looks like a function constructor call but for an int Makes no sense for me. Perhaps someone could..
http://stackoverflow.com/questions/3106110/what-is-move-semantics sentence and meant the exact same object every time We call expressions such as x lvalues . The arguments in lines 2 and.. be more precise at the end of the full expression that lexically contains the rvalue . This is important because during the.. couldn't tell a difference C 0x introduces a new mechanism called rvalue reference which among other things allows us to detect..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom elision and how it optimizes copy and swap idiom C dynamically allocating an array of objects c copy constructor assignment.. operator in terms of itself Not only that but unqualified calls to swap will use our custom swap operator skipping over the.. assignment operator and destructor it should really be called The Big Three and A Half any time your class manages a resource..
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 Just halt it several times and each time look at the call stack. If there is some code that is wasting some percentage.. but that is only true if they sample the entire call stack. Call graphs don't give you the same information because.. done on multi thread programs if there is a way to collect call stack samples of the thread pool at a point in time as there..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points says At certain specified points in the execution sequence called sequence points all side effects of previous evaluations shall.. if a is considered to be a primitive type at a function call whether or not the function is inline after the evaluation of.. include the evaluation of subexpressions that are not lexically part of the full expression. For example subexpressions involved..
http://stackoverflow.com/questions/4421706/operator-overloading Assignment Operator Input and Output Operators Function call operator Comparison operators Arithmetic Operators Array Subscription.. but the result is not what would be expected. Function call operator The function call operator used to create function.. would be expected. Function call operator The function call operator used to create function objects also known as functors..
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 this line the compiler will create a new class let's call it FooInt which is equivalent to the following struct FooInt..
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 need to know the meaning of a name but can just grammatically analyze the input and then create a parse tree out of it. In.. a type then it will be parsed as a declaration and semantically it will declare f as a pointer variable . However if it's a.. that contains it. The process that determines this is called name lookup. This however presents a problem in templates..
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 be easily predicted ahead of time. The compiler generates calls into a heap manager that knows how to dynamically allocate.. calls into a heap manager that knows how to dynamically allocate storage when it is needed and reclaim it when it is.. entered its local variables come alive. When that method calls another method the new method's local variables come alive...
Calling Objective-C method from C++ method? http://stackoverflow.com/questions/1061005/calling-objective-c-method-from-c-method Objective C method from C method I have a class EAGLView.. int MyObjectDoSomethingWith void self void aParameter Call the Objective C method using Objective C syntax return id self..
C++ superclass constructor calling rules http://stackoverflow.com/questions/120876/c-superclass-constructor-calling-rules SuperClass public SubClass int foo int bar SuperClass foo Call the superclass constructor in the subclass' initialization list...
How to use base class's constructors and assignment operator in C++? http://stackoverflow.com/questions/1226634/how-to-use-base-classs-constructors-and-assignment-operator-in-c Derived operator const Derived d ImplicitBase operator d Call compiler generated operator name_ strdup d.name_ return this..
How to get the application executable name in Windows (C++ Win32 or C++/CLI)? http://stackoverflow.com/questions/124886/how-to-get-the-application-executable-name-in-windows-c-win32-or-c-cli .net c winapi c cli share improve this question Call GetModuleFileName using 0 as a module handle. Note you can also.. string of characters that was used to start the program. Calling GetModuleFileName will always give you a complete path file..
What is exactly the base pointer and stack pointer? To what do they point? http://stackoverflow.com/questions/1395591/what-is-exactly-the-base-pointer-and-stack-pointer-to-what-do-they-point of the function call is Push parameters hInstance etc. Call function which pushes return address Push ebp Allocate space.. of the function call is Push parameters hInstance etc. Call function which pushes return address Push ebp Allocate space..
C++ implicit copy constructor for a class that contains other objects http://stackoverflow.com/questions/1810163/c-implicit-copy-constructor-for-a-class-that-contains-other-objects Zero Initialization compiler generated constructor X X Y Calls the base constructor If this is compiler generated use .. Default construction of basic PODS zeros them m_b 0 m_c Calls the default constructor of Z If this is compiler generated.. Value Initialization compiler generated constructor X X Y Calls the base constructor If this is compiler generated use ..
Is there any LAME c++ wraper\simplifier (working on Linux Mac and Win from pure code)? http://stackoverflow.com/questions/2495420/is-there-any-lame-c-wraper-simplifier-working-on-linux-mac-and-win-from-pure So to say I give it File with PCM and DEST file. Call something like LameSimple.ToMP3 file with PCM File with MP3..
Functions with const arguments and Overloading http://stackoverflow.com/questions/3682049/functions-with-const-arguments-and-overloading main Test obj Test const obj1 int variable 0 do obj.foo 3 Call the const function obj.foo variable Want to make it call 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 that is only true if they sample the entire call stack. Call graphs don't give you the same information because 1 they don't..
C/C++: switch for non-integers http://stackoverflow.com/questions/4165131/c-c-switch-for-non-integers char _buf T user so it must be at the outer level. Call it e.g. with xy_match bqr youruserdata And the break s are implicit..
Calling a java method from c++ in Android http://stackoverflow.com/questions/5198105/calling-a-java-method-from-c-in-android a java method from c in Android THE SOLUTION TO THIS PROBLEM.. String LIB_NAME name static System.loadLibrary LIB_NAME Called when the activity is first created. @Override public void.. env GetMethodID clazz messageMe Ljava lang String V Call the method on the object jobject result env CallObjectMethod..
Isn't the template argument (the signature) of std::function part of its type? http://stackoverflow.com/questions/5931214/isnt-the-template-argument-the-signature-of-stdfunction-part-of-its-type f 0 int x return 22 int y int return 44 int main a x Call is ambiguous. a y Call is ambiguous. a function int x Works... 22 int y int return 44 int main a x Call is ambiguous. a y Call is ambiguous. a function int x Works. a function int int y Works...
rand function returns same values when called within a single function c++ http://stackoverflow.com/questions/6729214/rand-function-returns-same-values-when-called-within-a-single-function-c You shouldn't call srand before each call to rand . Call it once somewhere at the start of your program. The problem..
Do I need to explicitly call the base virtual destructor? http://stackoverflow.com/questions/677620/do-i-need-to-explicitly-call-the-base-virtual-destructor like this... MyChildClass ~MyChildClass virtual in header Call to base destructor... this MyBaseClass ~MyBaseClass Some destructing..
How do I expand a tuple into variadic template function's arguments? http://stackoverflow.com/questions/687490/how-do-i-expand-a-tuple-into-variadic-template-functions-arguments t Args... args pObj f args... Object Function Call Forwarding Using Tuple Pack Parameters Actual apply function.. ArgsT... t Args... args f args... Static Function Call Forwarding Using Tuple Pack Parameters Actual apply function..
Square detection doesn't find squares http://stackoverflow.com/questions/7731742/square-detection-doesnt-find-squares n the sequence is stored in the specified memory storage n Call n . squares n Using OpenCV version s n CV_VERSION n endl int..
What is the difference between _tmain() and main() in C++? http://stackoverflow.com/questions/895827/what-is-the-difference-between-tmain-and-main-in-c char use wchar_t and so on Explicitly disable Unicode. Call main and CreateWindowA and use char for strings. Allow both...
Debugging core files generated on a Customer's box http://stackoverflow.com/questions/10616417/debugging-core-files-generated-on-a-customers-box of instruction or that the previous instruction is not a CALL . If either of these holds your stack trace is meaningless...
error LNK1169: one or more multiply defined symbols found http://stackoverflow.com/questions/12132453/error-lnk1169-one-or-more-multiply-defined-symbols-found Client Class protected string phone_number int counter CALL DURATION TO BE CHARGED double charge public string phone_number..
python object to native c++ pointer http://stackoverflow.com/questions/1355187/python-object-to-native-c-pointer f this get_override StringReturn return f return FAILED TO CALL Boost wrapping BOOST_PYTHON_MODULE GEGameMode class_ CGEGameModeBase..
What happens when a computer program runs? http://stackoverflow.com/questions/5162580/what-happens-when-a-computer-program-runs on the arg list and returns to the address set by the CALLer. int main int x 2 y 3 these variables are stored on the stack.. on the stack for a return value then issues an assembly CALL instruction. Write a simple program like this and then compile..
Need help in reading JPEG file using libjpeg http://stackoverflow.com/questions/5616216/need-help-in-reading-jpeg-file-using-libjpeg IT ALWAYS crash ON THIS JPEG_READ_SCANLINES FUNCTION CALL BELOW void jpeg_read_scanlines cinfo JSAMPARRAY imageData pixels..
Accessing class members on a NULL pointer http://stackoverflow.com/questions/669742/accessing-class-members-on-a-null-pointer which function will get called so it can generate a CALL machine code instruction to go directly to the desired function...
C++ inline functions using GCC - why the CALL? http://stackoverflow.com/questions/934529/c-inline-functions-using-gcc-why-the-call inline functions using GCC why the CALL I have been testing inline function calls in C . Thread model.. that the generated code is simply not inline. There is a CALL instrction for the isquare function. Why is this happening How..
Find a function by it signature in Windows DLL http://stackoverflow.com/questions/9644717/find-a-function-by-it-signature-in-windows-dll 68 A49E5E76 PUSH USER32.765E9EA4 765DEA2F FF15 34145876 CALL DWORD PTR DS KERNEL32.Interlocke kernel32.InterlockedCompareExchange.. FF75 08 PUSH DWORD PTR SS EBP 8 765DEA51 E8 73FFFFFF CALL USER32.MessageBoxExA 765DEA56 5D POP EBP 765DEA57 C2 1000 RETN.. 68 A49E5E76 PUSH USER32.765E9EA4 765DEA2F FF15 34145876 CALL DWORD PTR DS KERNEL32.Interlocke You have to make a balance..
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