c++ - Error C2535: 'ManagedArray::ManagedArray(void)' -

i working on project , after multiple searches error in title pretty lost. if may please figuring out.

class managedarray {      public:       float *elements;      int numberofelements;        /* default constructor */      managedarray() :elements(null){};      managedarray() :numberofelements(0){}; <--where error       /*accessor*/      int size() {return numberofelements; }      float get(int index) {return elements[index]; } 

according c++ standard (9.2 class members)

1. ...a member shall not declared twice in member-specification, except nested class or member class template can declared , later defined, , except enumeration can introduced opaque-enum-declaration , later redeclared enum-specifier.

you declared , defined default constructor 2 times

 managedarray() :elements(null){};  managedarray() :numberofelements(0){}; <--where error 

you add parameter second constructor example

 managedarray() :elements(null){};  managedarray( int n ) :numberofelements(n){}; 

or following way

 explicit managedarray( int n ) :numberofelements(n){};  ^^^^^^^^ 

take account instead of type int better use type size_t data member numberofelements @ least because number of elements can not negative.

also both constructors should initialize data members.

for example

 managedarray() :elements(null), numberofelements( 0 ){};