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c++ Programming Glossary: usingWhat 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 actually to the object or library that uses it . If you're using MSVS you'll see that projects generate .lib files. These contain..
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.. occasionally. C# or possibly just .NET seems to recommend using just an underscore as in _foo . Is this allowed by the C standard.. to the C language or the POSIX.1 environment. While using these names for your own purposes right now might not cause..
http://stackoverflow.com/questions/236129/how-to-split-a-string-in-c now is #include iostream #include sstream #include string using namespace std int main string s Somewhere down the road istringstream.. sstream #include algorithm #include iterator int main using namespace std string sentence And I feel fine... istringstream.. to an output stream one could insert them into a container using the same generic copy algorithm. vector string tokens copy istream_iterator..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three already does it for you. Just compare the simple code using a std string member to the convoluted and error prone alternative.. member to the convoluted and error prone alternative using a char and you should be convinced. As long as you stay away..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points like a i 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..
http://stackoverflow.com/questions/4421706/operator-overloading changing a type so it is better to make a habit of always using prefix increment unless postfix is explicitly needed. Binary..
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 library a tutorial and handbook The only portable way of using templates at the moment is to implement them in header files.. at the moment is to implement them in header files by using inline functions. Why is this c templates c faq share improve.. T struct Foo T bar void doSomething T param do stuff using T somewhere in a .cpp Foo int f When reading this line the compiler..
Why is iostream::eof inside a loop condition considered wrong? http://stackoverflow.com/questions/5605125/why-is-iostreameof-inside-a-loop-condition-considered-wrong wrong I just found a comment in this answer saying that using iostream eof in a loop condition is almost certainly wrong ... checks for EOF why is checking for eof explicitly using iostream eof wrong How is it different from using scanf ..... using iostream eof wrong How is it different from using scanf ... ... EOF in C which I often use with no problems c..
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 T struct derive_from_Has_type typename SomeBase T type In using declarations it's not possible to use template after the last.. template typename T struct derive_from_Has_type SomeBase T using SomeBase T template type error using typename SomeBase T type.. SomeBase T using SomeBase T template type error using typename SomeBase T type typename is allowed In current C typename..
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 is allowed to tell the operating system we're done using this page of stack now. Until I say otherwise issue an exception..
http://stackoverflow.com/questions/1265039/using-std-namespace std Namespace There seem to be different views on using 'using'..
C++ Which is faster: Stack allocation or Heap allocation http://stackoverflow.com/questions/161053/c-which-is-faster-stack-allocation-or-heap-allocation faster since all it really does is move the stack pointer. Using memory pools you can get comparable performance out of heap..
http://stackoverflow.com/questions/162941/why-use-pointers amount of memory to it before giving it a value. Using malloc calloc or similar. This since you only declared one element..
Most effective way for float and double comparison http://stackoverflow.com/questions/17333/most-effective-way-for-float-and-double-comparison presumption in an algorithm that if a b and b c then a c . Using the same epsilon for lines measured in inches and lines measured.. for both the cosine of angles and the length of lines Using such a compare function to sort items in a collection. In this..
http://stackoverflow.com/questions/2979209/using-fflushstdin fflush stdin So a quick google search for fflush stdin for..
What are all the common undefined behaviour that a C++ programmer should know about? [closed] http://stackoverflow.com/questions/367633/what-are-all-the-common-undefined-behaviour-that-a-c-programmer-should-know-ab a pointer returned by a new allocation of size zero Using pointers to objects whose lifetime has ended for instance stack.. Converting pointers to objects of incompatible types Using memcpy to copy overlapping buffers . Buffer overflows Reading.. by the target type either directly or via static_cast Using an automatic variable before it has been definitely assigned..
When and why will an OS initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete? http://stackoverflow.com/questions/370195/when-and-why-will-an-os-initialise-memory-to-0xcd-0xdd-etc-on-malloc-free-new or Aligned Fence 'No man's land' for aligned allocations. Using a 0xBD different value here than 0xFD allows the runtime to..
Using arrays or std::vectors in C++, what's the performance gap? http://stackoverflow.com/questions/381621/using-arrays-or-stdvectors-in-c-whats-the-performance-gap arrays or std vectors in C what's the performance gap In our.. c arrays vector share improve this question Using C arrays with new that is using dynamical arrays should be avoided... to delete them manually and do all sort of housekeeping. Using arrays on the stack is also discouraged because you don't have..
Pretty-print C++ STL containers http://stackoverflow.com/questions/4850473/pretty-print-c-stl-containers UMap um std endl String cs std endl Array a std endl Using custom delimiters manually std cout pretty_print print_container_helper.. std string char std char_traits char MyDel v std endl Using custom delimiters with the type erasing helper class std cout..
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 to clear h here h.OpenFrontDoor will most likely fail Using h after the call to .Free might work but that is just pure luck...
Why should `new` be used as little as possible? http://stackoverflow.com/questions/6500313/why-should-new-be-used-as-little-as-possible often as possible Basically the last paragraph sums it up. Using automatic storage as often as possible makes your programs faster.. Consider the following program int main Line l1 Line l2 l1 Using the original version this program will likely crash as it uses.. likely crash as it uses delete on the same string twice. Using the modified version each Line instance will own its own string..
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