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c++ Programming Glossary: nowWhat 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 of implementation files into object files or libraries and now you want to get them to work together. Say you defined symbol..
Why is “using namespace std;” considered bad practice? http://stackoverflow.com/questions/1452721/why-is-using-namespace-std-considered-bad-practice But one day you upgrade to a new version of Foo 2.0 which now offers a function called Quux . Now you've got a conflict Both..
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 While using these names for your own purposes right now might not cause a problem they do raise the possibility of conflict..
http://stackoverflow.com/questions/236129/how-to-split-a-string-in-c efficiency in your answer. The best solution I have right now is #include iostream #include sstream #include string using..
http://stackoverflow.com/questions/3106110/what-is-move-semantics made sense to me and I am actually excited about C 0x now with the exception of one. I still don't get move semantics.. only implement the destructor and the copy constructor for now ~string delete data string const string that size_t size strlen.. to another instead of copying them. Congratulations you now understand the basics of move semantics Let's continue by implementing..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom mSize mArray 3 return this And we say we're finished this now manages an array without leaks. However it suffers from three.. copy and swap idiom will fix all these issues. But right now we have all the requirements except one a swap function. While.. from this bonus in functionality and efficiency we are now ready to implement the copy and swap idiom. Without further..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three and get into trouble I pushed a person into a vector and now I get crazy memory errors Remember that by default copying an..
Why is iostream::eof inside a loop condition considered wrong? http://stackoverflow.com/questions/5605125/why-is-iostreameof-inside-a-loop-condition-considered-wrong while inStream.eof int data yay not end of stream yet now read ... inStream data oh crap now we read the end and only.. not end of stream yet now read ... inStream data oh crap now we read the end and only now the eof bit will be set as well.. ... inStream data oh crap now we read the end and only now the eof bit will be set as well as the fail bit do stuff with..
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 in an explosion while you are sneaking around. You don't know what is going to happen when you checked out of the hotel and.. The compiler generates calls into a heap manager that knows how to dynamically allocate storage when it is needed and reclaim.. where the lifetime of each byte in the storage is well known and in particular lifetimes of storages follow a nesting pattern...
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 started since these are the ones I am searching for right now where are there good online resources for C89 C99 C 03 C 11.. was able to find the C 11 standard at reasonable price and now the C11 standard. So as an example you search for NCITS ISO..
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 wiki File Entroncamento_do_Transpraia.JPG Now for the sake of argument suppose this is back in the 1800s before..
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 them to work together. Say you defined symbol a in a.cpp . Now b.cpp declared that symbol and used it. Before linking it simply..
Why is “using namespace std;” considered bad practice? http://stackoverflow.com/questions/1452721/why-is-using-namespace-std-considered-bad-practice of Foo 2.0 which now offers a function called Quux . Now you've got a conflict Both Foo 2.0 and Bar import Quux into..
Do-While and if-else statements in C/C++ macros http://stackoverflow.com/questions/154136/do-while-and-if-else-statements-in-c-c-macros something like your second macro. #define BAR X f x g x Now if you were to use BAR X in an if ... else statement where the..
http://stackoverflow.com/questions/3106110/what-is-move-semantics Line 2 string c some_function_returning_a_string Line 3 Now comes the key insight into move semantics. Note that only in..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom second.mSize swap first.mArray second.mArray ... Now not only can we swap our dumb_array 's but swaps in general.. to make the copy and never need to repeat any bit of it. Now that the copy is made we are ready to swap. Observe that upon.. and not a reference dumb_array operator dumb_array other 1 Now if other is being initialized with an rvalue it will be move..
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 0.991 0.1 0.01 0.00991 0.01375 1 P o 2 2 0.01375 Now it says P f 0.5 is 26 up from the prior assumption of 0.6 ...
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points x or y will be evaluated first. Another example here . Now the Standard in §5 4 says 1 Between the previous and next sequence..
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 aggregate even it is an array of non aggregate class type. Now let's look at some examples class NotAggregate1 virtual void.. void f ok just a private function You get the idea. Now let's see how aggregates are special. They unlike non aggregate.. array int array 2 1 2 3 4 ERROR too many initializers Now let's see how aggregate classes can be initialized with braces...
Pretty-print C++ STL containers http://stackoverflow.com/questions/4850473/pretty-print-c-stl-containers i x.end i if i x.begin o delim o i o close return o Now I've seen plenty of template magic here on SO that I never thought.. const pretty_print delimiters_values char MyDel values Now we want to be able to write std cout MyPrinter v std endl for..
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 14.6.2.3 for value dependent expressions. Dependent names Now of all the constructs that denote dependent types or expressions.. and never as a name followed by the less than operator Now we are back to the same problem as with typename . What if we..
Do the parentheses after the type name make a difference with new? http://stackoverflow.com/questions/620137/do-the-parentheses-after-the-type-name-make-a-difference-with-new when one needs the memory to be in the stack space. Now with the uniform initialization syntax one can do B obj default..
What are the differences between struct and class in C++ http://stackoverflow.com/questions/92859/what-are-the-differences-between-struct-and-class-in-c question was already asked in the context of C# .Net . Now I'd like to learn the differences between a struct and a class..
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