Error C2512 No Appropriate Default Constructor Available Struct

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or std::vector no appropriate default constructor available posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss no appropriate default constructor available c++ Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes not appropriate a minute: Sign up error C2512: no appropriate default constructor available (not classes) up vote 1 down vote favorite I'm starting out with structures, and I'm having problems dynamically allocating my structure array. I'm doing what I see in my book and on the internet, but I can't get it right. Here's both full error messages: C2512: 'Record' : no appropriate default constructor available IntelliSense: no default constructor exists for class "Record" #include #include using namespace std; const int NG = 4; // number of scores struct Record { string name; // student name int scores[NG]; double average; // Calculate the average // when the scores are known Record(int s[], double a) { double sum = 0; for(int count = 0; count != NG; count++) { scores[count] = s[count]; sum += scores[count]; } average = a; average = sum / NG; } }; int main() { // Names of the class string names[] = {"Amy Adams", "Bob Barr", "Carla Carr", "Dan Dobbs", "Elena Evans"}; // exam scores according to each student int exams[][NG]= { {98, 87, 93, 88}, {78, 86, 82, 91}, {66, 71, 85, 94}, {72, 63, 77, 69}, {91, 83, 76, 60}}; Record *room = new Record[5]; return 0; } c++ arrays structure dynamic-memory-allocation dynamic-allocation share|improve this question asked Nov 8 '13 at 2:52 SoloMael 2818 If you think this doesn't try to invoke the default constructor for class Record, you're wrong: Record *room = new Record[5]; –WhozCraig Nov 8 '13 at 2:54 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote accepted The error is quite clear. By the time you are trying to allocate an array: Record *room = new Record[5]; a default constructor, i.e. Record::Record(), must be implemented so that 5 instances of Record can be created: struct Record { ... Record() : average(0.0) { } Record(int s[], double a) { ... } }; Also note that dynamic allocation is something you want to avoid as much as possible in C++ (except the situations when you have really good reason for it). In this case it would be more reasonable to use an std::vector instead: std::vector records(5); share|improve this an

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up No appropriate default constructor http://stackoverflow.com/questions/19850765/error-c2512-no-appropriate-default-constructor-available-not-classes available in struct with glm vectors up vote 0 down vote favorite in .h: enum collisionType {AB, BA, AoverB, AunderB}; struct Collision { public: collisionType type; glm::vec2 point1; glm::vec2 point2; Collision(enum collisionType, glm::vec2, glm::vec2); }; in .cpp: Collision::Collision(enum collisionType collisType, glm::vec2 p1, glm::vec2 p2) : type(collisType), point1(p1), point2(p2) { } using it std::vector collisions; glm::vec2 point1(11.0, 12.0); glm::vec2 point2(12.0, 13.0); collisions.push_back(Collision(AoverB, point1, point2)); Getting error C2512: http://stackoverflow.com/questions/23018536/no-appropriate-default-constructor-available-in-struct-with-glm-vectors 'Collision' : no appropriate default constructor available, why? c++ default-constructor glm-math share|improve this question asked Apr 11 '14 at 17:03 rluks 62521433 The snippet above compiles just well on g++. Are you sure you you dont use Collision a; or smth somewhere? –Blaz Bratanic Apr 11 '14 at 17:24 add a comment| 2 Answers 2 active oldest votes up vote 1 down vote You can read here the requirements for a type T to be well suited for std::vector. Default-constructible is not listed there. I also tried compiling this minimal code sample, in which X doesn't have a default constructor, and it compiles fine with MSVC: #include struct X { X(int a, int b) : A(a), B(b) {} int A; int B; }; int main() { std::vector v; v.push_back(X(10,20)); } So, the problem must be elsewhere in your code. Anyway, you may want to add a constructor with no arguments to make your Collission class "default-constructible", and make the compiler happy: struct Collision { // Default constructor. // Initialize data members to some init values. Collision() { ... } PS Note that struct in C++ is equivalent to class { pu

resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards Events Community Magazine Forums Blogs Channel 9 Documentation APIs and reference Dev centers Retired https://msdn.microsoft.com/en-us/library/9zkz8dx6.aspx content Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. C/C++ Building Reference C/C++ Build Errors Compiler Errors C2500 Through C2599 Compiler Errors C2500 https://bytes.com/topic/c/answers/716043-no-default-constructor-available-problem Through C2599 Compiler Error C2512 Compiler Error C2512 Compiler Error C2512 Compiler Error C2500 Compiler Error C2502 Compiler Error C2503 Compiler Error C2504 Compiler Error C2505 Compiler Error C2506 Compiler Error C2507 Compiler no appropriate Error C2509 Compiler Error C2510 Compiler Error C2511 Compiler Error C2512 Compiler Error C2513 Compiler Error C2514 Compiler Error C2516 Compiler Error C2517 Compiler Error C2518 Compiler Error C2521 Compiler Error C2523 Compiler Error C2524 Compiler Error C2526 Compiler Error C2528 Compiler Error C2529 Compiler Error C2530 Compiler Error C2531 Compiler Error C2532 Compiler Error C2533 Compiler Error C2534 Compiler Error C2535 Compiler Error C2537 no appropriate default Compiler Error C2540 Compiler Error C2541 Compiler Error C2542 Compiler Error C2543 Compiler Error C2544 Compiler Error C2545 Compiler Error C2548 Compiler Error C2549 Compiler Error C2550 Compiler Error C2551 Compiler Error C2552 Compiler Error C2553 Compiler Error C2555 Compiler Error C2556 Compiler Error C2557 Compiler Error C2558 Compiler Error C2561 Compiler Error C2562 Compiler Error C2563 Compiler Error C2566 Compiler Error C2567 Compiler Error C2568 Compiler Error C2569 Compiler Error C2570 Compiler Error C2571 Compiler Error C2572 Compiler Error C2573 Compiler Error C2574 Compiler Error C2575 Compiler Error C2577 Compiler Error C2579 Compiler Error C2581 Compiler Error C2582 Compiler Error C2583 Compiler Error C2584 Compiler Error C2585 Compiler Error C2586 Compiler Error C2587 Compiler Error C2588 Compiler Error C2589 Compiler Error C2592 Compiler Error C2593 Compiler Error C2594 Compiler Error C2597 Compiler Error C2598 Compiler Error C2599 TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. Compiler Error C2512 Visual Studio 2015 Other Versions Visual Studio 2013 Visual Studio 2012 Visual Studio 2010 Visual Studio 2008 Visual Studio 2005 Visual Studio .

your question and get tips & solutions from a community of 418,505 IT Pros & Developers. It's quick & easy. No Default Constructor available problem P: 31 krishnasamy Hi, I have a sq.h include file which containing following code, Expand|Select|Wrap|Line Numbers structFRSDK_SHAREDSampleQuality { SampleQuality(boolenrollmentOk,boolverificationOk,floatq, conststd::string&hint); constboolgoodForEnrollment; constboolgoodForVerification; constfloatquality; conststd::stringhint; }; classFRSDK_SHAREDSampleEvaluator { public: SampleEvaluator(constConfiguration&); SampleEvaluator(constSampleEvaluator&); SampleEvaluator&operator=(constSampleEvaluator&); ~SampleEvaluator(); SampleQualityevaluate(/**theImagetoevaluate*/ constImage&img, /**locationoftheeyes*/ constEyes::Location&eloc); private: classImplementation; CountedPtrimp; }; } #endif I include the sq.h file and I have write the following code in my CPP file, FRsdk::Eyes::Location eyesLoc = eyesLocations.front(); FRsdk::SampleQuality sampleQuality = FRsdk::SampleEvaluator::evaluate( img, eyesLoc); The following error are come, 'FRsdk::SampleQuality' : no appropriate default constructor available 'FRsdk::SampleEvaluator::evaluate' : illegal call of non-static member function what is the problem? Sep 30 '07 #1 Post Reply Share this Question 7 Replies Expert 2.5K+ P: 3,652 Ganon11 For the first error, the error text says it all. You are trying to use the default constructor somewhere, but you don't have one. Either find out where you're instantiating a StructQuality object without passing it the proper arguments, or write a default constructor for the struct (This can be as easy as giving it default values in the already-defined constructor). Sep 30 '07 #2 reply P: 31 krishnasamy For the first error, the error text says it all. You are trying to use the default constructor somewhere, but you don't have one. Either find out where you're instantiating a StructQuality object without passing it the proper arguments, or write a default constructor for the struct (This can be as easy as giving it default values in the already-defined constructor). Thanks for your reply. I am a new for vc++. So how I write a default constructor for the struct. Sep 30 '07 #3 reply Expert 2.5K+ P: 3,652 Ganon11 A default constructor is a constructor that has no arguments. So you would