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c++ Programming Glossary: errorWhat 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 is an undefined reference unresolved external symbol error and how do I fix it What are undefined reference unresolved.. What are undefined reference unresolved external symbol errors What are common causes and how to fix them Feel free to edit.. how to fix them Feel free to edit add your own. c linker error undefined reference c faq unresolved external share improve..
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 a digit or uppercase letter may be used for additional error code names. See Error Reporting. Names that begin with either..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three I pushed a person into a vector and now I get crazy memory errors Remember that by default copying an object means copying its.. code using a std string member to the convoluted and error prone alternative using a char and you should be convinced...
http://stackoverflow.com/questions/4421706/operator-overloading otherwise their implementation results in a compile time error. The unary address of operator should never be overloaded. For..
http://stackoverflow.com/questions/4810664/how-do-i-use-arrays-in-c C provides abstractions that are easier to use and less error prone std vector T since C 98 and std array T n since C 11 so..
When to use forward declaration? http://stackoverflow.com/questions/553682/when-to-use-forward-declaration type Use it as a base class class Foo X compiler error Use it to declare a member class Foo X m compiler error Define.. error Use it to declare a member class Foo X m compiler error Define functions or methods using this type void f1 X x compiler.. functions or methods using this type void f1 X x compiler error X f2 compiler error Use its methods or fields in fact trying..
What are the differences between pointer variable and reference variable in C++? http://stackoverflow.com/questions/57483/what-are-the-differences-between-pointer-variable-and-reference-variable-in-c can contain NULL. int p NULL int r NULL compiling error Pointers can iterate over an array you can use to go to 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 to cast a Union bool float to std string is a compile time error. The simple solution was to add a template typename U struct.. but when instantiation finds it denotes a type the usual error messages are emitted by the compiler. Since whether it's a type.. a type or not determines parsing you will often get parser errors already at definition time t x is taken as non type but as..
http://stackoverflow.com/questions/1151582/pthread-function-from-a-class Giving me problem pthread_create t1 NULL c 0 .print NULL Error Ouput cannot convert ˜void tree_item void to ˜void void for argument..
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 letter may be used for additional error code names. See Error Reporting. Names that begin with either 'is' or 'to' followed..
What are access specifiers? Should I inherit with private, protected or public? http://stackoverflow.com/questions/5447498/what-are-access-specifiers-should-i-inherit-with-private-protected-or-public a 10 Allowed b 20 Allowed c 30 Not Allowed Compiler Error int main Derived obj obj.a 10 Allowed obj.b 20 Not Allowed Compiler.. Derived obj obj.a 10 Allowed obj.b 20 Not Allowed Compiler Error obj.c 30 Not Allowed Compiler Error Private Inheritance All.. Not Allowed Compiler Error obj.c 30 Not Allowed Compiler Error Private Inheritance All Public members of the Base Class become..
How to generate a stacktrace when my gcc C++ app crashes http://stackoverflow.com/questions/77005/how-to-generate-a-stacktrace-when-my-gcc-c-app-crashes array 10 print out all the frames to stderr fprintf stderr Error signal d n sig backtrace_symbols_fd array size STDERR_FILENO.. . test.c o test Executing this gets you this output . test Error signal 11 . test handler 0x19 0x400911 lib64 tls libc.so.6 0x3a9b92e380..
Why is reading lines from stdin much slower in C++ than Python? http://stackoverflow.com/questions/9371238/why-is-reading-lines-from-stdin-much-slower-in-c-than-python MAX_LINE stdin NULL line_count if ferror stdin perror Error reading stdin. Now here are the results using an even larger..
C++ stringstream, string, and char* conversion confusion http://stackoverflow.com/questions/1374468/c-stringstream-string-and-char-conversion-confusion char cstr2 ss.str .c_str cout cstr1 Prints correctly cstr2 ERROR prints out garbage system PAUSE return 0 The assumption that..
Namespace + functions versus static methods on a class http://stackoverflow.com/questions/1434937/namespace-functions-versus-static-methods-on-a-class string s Ok vector v Ok string ss COMPILATION ERROR vector vv COMPILATION ERROR And you can even limit the pollution.. v Ok string ss COMPILATION ERROR vector vv COMPILATION ERROR And you can even limit the pollution to one class #include string.. vector using std string string s Ok vector v COMPILATION ERROR string ss COMPILATION ERROR vector vv COMPILATION ERROR This..
How to pass parameters correctly? http://stackoverflow.com/questions/15600499/how-to-pass-parameters-correctly CreditCard cc 12345 2 2015 1001 Account acc asdasd 345 cc ERROR cc is an lvalue Because cc is an lvalue and rvalue references..
http://stackoverflow.com/questions/2253168/dynamic-cast-in-c d new D B b static_cast B d this works X x static_cast X d ERROR Won't compile return 0 dynamic_cast Type ptr This again tries.. int main Base base new Der Der der dynamic_cast Der base ERROR Won't compile return 0 Adding a virtual function to base such..
Critique my non-intrusive heap debugger http://stackoverflow.com/questions/2835416/critique-my-non-intrusive-heap-debugger alive true if canary_dead address sizeof CANARY printf ERROR buffer underflow at p n address alive false if canary_dead.. address alive false if canary_dead address size printf ERROR buffer overflow at p n address alive false return alive const.. metadata p the_hashset.find payload if p in_use printf ERROR no dynamic memory at p n payload else if p kind kind printf..
Why don't the std::fstream classes take a std::string? http://stackoverflow.com/questions/32332/why-dont-the-stdfstream-classes-take-a-stdstring cstr2 void g char cstr abc std string str def f cstr str ERROR ambiguous Because you can convert either way between a std string..
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 available int main A a1 3 A 2 A 1 A 14 OK n m A a2 3 A 2 ERROR A has no default constructor. Unable to value initialize a2.. of course Array4 is a global array int array 2 1 2 3 4 ERROR too many initializers Now let's see how aggregate classes can..
Nonstatic member as a default argument of a nonstatic member function http://stackoverflow.com/questions/4539406/nonstatic-member-as-a-default-argument-of-a-nonstatic-member-function member function struct X X mem 42 void f int param mem ERROR do something private int mem Can anyone give me just one reason.. Your code simplified struct X int mem void f int param mem ERROR You want to use a non static member data as default value for..
http://stackoverflow.com/questions/4707012/c-memcpy-vs-stdcopy new std nothrow char int copyMe bits 0 if bits NULL cout ERROR Not enough memory. n exit 1 memcpy bits copyMe bits int copyMe..
How to execute a command and get output of command within C++? http://stackoverflow.com/questions/478898/how-to-execute-a-command-and-get-output-of-command-within-c string exec char cmd FILE pipe popen cmd r if pipe return ERROR char buffer 128 std string result while feof pipe if fgets buffer..
Calling a java method from c++ in Android http://stackoverflow.com/questions/5198105/calling-a-java-method-from-c-in-android JNI After clean compilation app stops with next message ERROR AndroidRuntime 742 FATAL EXCEPTION main java.lang.NoSuchMethodError..
Resolve circular dependencies in c++ http://stackoverflow.com/questions/625799/resolve-circular-dependencies-in-c A int val _val val void SetB B b _b b _b Print COMPILER ERROR C2027 use of undefined type 'B' void Print cout Type A val..
Compile a DLL in C/C++, then call it from another program http://stackoverflow.com/questions/847396/compile-a-dll-in-c-c-then-call-it-from-another-program int int ldll LoadLibrary mydll.dll if ldll void HINSTANCE_ERROR add2 GetProcAddress ldll add2 mul GetProcAddress ldll mul printf.. mul printf add2 3 d nmul 4 5 d add2 3 mul 4 5 else printf ERROR. any ideas solved it To solve the previous problem I just had..
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