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c++ Programming Glossary: ifWhat 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 Compiling a C program takes place in several steps as specified by 2.2 credits to Keith Thompson for the reference The precedence.. precedence among the syntax rules of translation is specified by the following phases see footnote . Physical source file.. introducing new line characters for end of line indicators if necessary. SNIP Each instance of a backslash character immediately..
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 are the rules about using an underscore in a C identifier It's common in C to name member variables with some kind.. any scope including for use as implementation macros identifiers beginning with an underscore and an uppercase letter identifiers.. beginning with an underscore and an uppercase letter identifiers containing adjacent underscores or double underscore 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 to use a profiler use one of the suggested ones. However if you're in a hurry and you can manually interrupt your program.. it. You may have multiple performance problems of different sizes. If you clean out any one of them the remaining.. profilers give you this information but that is only true if they sample the entire call stack. Call graphs don't give you..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three them. The implementation will implicitly define them if they are used. ... end note n3126.pdf section 12 Ā§1 By default.. assignment operator person operator const person that if this that delete name This is a dangerous point in the flow.. strcpy name that.name age that.age return this Note the difference between initialization and assignment we must tear down..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points What are Sequence Points The Standard says At certain specified points in the execution sequence called sequence points all.. effects Evaluation of an expression produces something and if in addition there is a change in the state of the execution.. a and a . The behaviour is undefined in that case if a is considered to be a primitive type at a function call whether..
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 Aren't the contents of a hotel room drawer inaccessible if you haven't rented the room Well obviously that scenario can.. book. You didn't make a contract with them that said that if you leave stuff behind they'll shred it for you. If you illegally.. in. You didn't make a contract with them that said if I try to sneak back into my room later you are required to stop..
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 variables rather than local variables or parameters. If you've come from an MFC background you'll probably use m_foo.. headers is included. No other identifiers are reserved. If the program declares or defines an identifier in a context in.. identifier as a macro name the behavior is undefined. If the program removes with #undef any macro definition of an identifier..
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 code c unix profiling share improve this question If your goal is to use a profiler use one of the suggested ones... it several times and each time look at the call stack. If there is some code that is wasting some percentage of the time.. you will see it. There is no educated guesswork required. If you do have a guess as to what the problem is this will prove..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three Stroustrup 60 person b a What happens here b a And here If you are puzzled by the name name age age part this is called.. via b . Once b is destroyed a.name is a dangling pointer. If a is destroyed deleting the dangling pointer yields undefined.. person that char local_name new char strlen that.name 1 If the above statement throws the object is still in the same state..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points i to make myself feel better. Why should I stop using them If you've read this be sure to visit the follow up question Undefined.. This is meant to be an entry to Stack Overflow's C FAQ . If you want to critique the idea of providing an FAQ in this form.. answer is a bit long. So have patience while reading it. If you already know these things reading them again won't make..
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 them with the template argument in this case int . If these implementations were not in the header they wouldn't be.. float You will only be able to use Foo with int or float If my explanation isn't clear enough you can have a look at the..
C++ timing, milliseconds since last whole second http://stackoverflow.com/questions/117346/c-timing-milliseconds-since-last-whole-second has millisecond and nanosecond representations IF the underlying platform supports them. While it is using platform..
Common macro to read input data and check its validity http://stackoverflow.com/questions/15792984/common-macro-to-read-input-data-and-check-its-validity d a a 3 a 15 The macro should scan the data and IF one of the following criteria is not true then print a message..
Is it safe to call a pure virtual function in an abstract constructor/destructor, IF it has a body? http://stackoverflow.com/questions/18456450/is-it-safe-to-call-a-pure-virtual-function-in-an-abstract-constructor-destructor virtual function in an abstract constructor destructor IF it has a body Without the line marked BODY I know this is not..
Why use #ifndef CLASS_H and #define CLASS_H in .h file but not in .cpp? http://stackoverflow.com/questions/3246803/why-use-ifndef-class-h-and-define-class-h-in-h-file-but-not-in-cpp main.cpp can call functions and use variables in class.cpp IF AND ONLY IF THEY ARE DECLARED IN class.h . I hope this was helpful... call functions and use variables in class.cpp IF AND ONLY IF THEY ARE DECLARED IN class.h . I hope this was helpful. share..
How is dynamic_cast typically implemented? http://stackoverflow.com/questions/3314944/how-is-dynamic-cast-typically-implemented make sense to use something like struct Token enum AND OR IF virtual std size_t GetTokenId 0 struct AndToken public Token..
How to call a lib written in C++ from C? http://stackoverflow.com/questions/4014851/how-to-call-a-lib-written-in-c-from-c there is no such question on SO either. I do not even know IF this can work far lesser HOW this has to be done. c c linker..
simple C++ templates suited for STL Containers http://stackoverflow.com/questions/406903/simple-c-templates-suited-for-stl-containers I would like to make the second example work and then IF possible i would like to add some code in the template to check..
When do programmers use Empty Base Optimization (EBO) http://stackoverflow.com/questions/4325144/when-do-programmers-use-empty-base-optimization-ebo means in the same scenario we would necessarily be at loss IF we don't use EBO . Please note that if your answer contains..
Operator overloading : member function vs. non-member function? http://stackoverflow.com/questions/4622330/operator-overloading-member-function-vs-non-member-function problem we define operator overloaded function as friend IF it needs to access private members. Make it friend ONLY when..
http://stackoverflow.com/questions/4767068/c-header-guards function is. It will also try to include the mymath.h file IF that hasn't been looked at already. share improve this answer..
Are there general guidlines for solving undefined reference/unresolved symbol issues? http://stackoverflow.com/questions/491859/are-there-general-guidlines-for-solving-undefined-reference-unresolved-symbol-is symbol unresolved share improve this question IF YOU WERE USING MSVC You cannot evade this type of error by setting..
In CMake, how do I work around the Debug and Release directories Visual Studio 2010 tries to add? http://stackoverflow.com/questions/7747857/in-cmake-how-do-i-work-around-the-debug-and-release-directories-visual-studio-2 version of Visual Studio 2008 I used the following IF MSVC_IDE # A hack to get around the Debug and Release directories.. targetname PROPERTIES IMPORT_PREFIX .. ENDIF MSVC_IDE This worked fine but no longer seems to do the trick...
http://stackoverflow.com/questions/8896/memcached-on-windows-x64 on Windows x64 Does anyone know IF WHEN or HOW I can get Memcached running on a Windows 64bit environment..
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