c++ - How to convert std::array to a class type -

i have below code need create array of object thru templated class. templated class receive class type:

#include <iostream> #include <array> class b {     public:     b() {std::cout << "b called" <<std::endl;}     b(int y){std::cout << "b int called" <<std::endl;}     static const int mysize; }; const int b::mysize = 256;  template <typename anotherclass> class : public anotherclass {     public:     a(){std::cout << "called" << std::endl;}     static anotherclass* obj[anotherclass::mysize];     //static anotherclass[] init();     static std::array<anotherclass*,anotherclass::mysize> init(); };  template <typename anotherclass> std::array<anotherclass*, anotherclass::mysize> a<anotherclass>::init () {     std::array<anotherclass*,256> objtemp[anotherclass::mysize];      (int = 0 ; < anotherclass::mysize; i++)     { objtemp[i] = new anotherclass(2); }     return  objtemp; } //a<b> obj[256] = [] () {for (int = 0 ; < 256; i++) { obj[i] = new a<b>(2)}}; template <typename anotherclass> anotherclass* a<anotherclass>::obj[anotherclass:: mysize] = a<anotherclass>::init();  int main() {     a<b> a; } 

when getting below error -

could not convert ‘objtemp’ ‘a<b> [256]’ ‘std::array<b, 256ul> conversion ‘std::array<b, 256ul>’ non-scalar type ‘a<b>’ requested 

i changed objtemp std::array , error went away below error -

   32:1 error: need ‘typename’ before ‘a<anotherclass>::obj’ because ‘a<anotherclass>’ dependent scope      a<anotherclass>::obj = a<anotherclass>::init(); 

i not sure error means?

i got actual fix:

template <typename anotherclass> anotherclass a<anotherclass>::obj[anotherclass:: mysize] = a<anotherclass>::init(); 

but below output receive :

b called called 

whereby expecting b' constructor called 256 times cause of below statement

objtemp[i] = new anotherclass(2)  

i understand since need create 256 objects of class b type constructor should called 256 times not happening in case. should initialise static array of objects in case -

 template <typename anotherclass> anotherclass a<anotherclass>::obj[anotherclass:: mysize] = a<anotherclass>::init(); 

whats wrong in above code or missing something?

just make mind whether you're going use c-style array or std::array. latter seems better choice, c-style arrays can't copied simply you're using c++ (11).

so declare objtemp , obj std::arrays.