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Error LNK1120: 4 unresolved externals --Initializing class vector variable inside constructor

GCODE (11)
I am trying to link a vector of vectors from my header file to my .cpp file, but I am getting a couple errors in the form of:

Error 5 error LNK1120: 4 unresolved externals

Error 1 error LNK2020: unresolved token (0A00001A) "private: static class std::vector >,class std::allocator > > > * Radix::negArrayPtr" (?negArrayPtr@Radix@@$$Q0PAV?$vector@V?$vector@HV?$allocator@H@std@@@std@@V?$allocator@V?$vector@HV?$allocator@H@std@@@std@@@2@@std@@A)

Error 2 error LNK2020: unresolved token (0A00001C) "private: static class std::vector >,class std::allocator > > > * Radix::zeroArrayPtr" (?zeroArrayPtr@Radix@@$$Q0PAV?$vector@V?$vector@HV?$allocator@H@std@@@std@@V?$allocator@V?$vector@HV?$allocator@H@std@@@std@@@2@@std@@A)

and 2 other errors similar to the previous 2 (Error 1 and 2).

Here is my code:

Radix.cpp
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#include "stdafx.h"
#include "Radix.h"

using namespace std;


Radix::Radix(int cols)
{

   zeroArrayPtr = new vector< vector <int> >;
   negArrayPtr  = new vector< vector <int> >;

   if (zeroArrayPtr->size() == 0)
   {
   createArrays(cols);
   }
}

void Radix::createArrays(int cols)


Radix.h
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#ifndef RADIX_H
#define RADIX_H

#include <iostream>
#include <math.h>
#include <vector>
#include <stack>

using namespace std;

class Radix
{
  public:
       Radix(int cols);

  private:
       void createArrays(int cols);

       static vector<vector<int> > *zeroArrayPtr;
       static vector<vector<int> > *negArrayPtr;
};

#endif // RADIX_H


It obviously has something to do with the static vector of vectors (zeroArrayPtr and negArrayPtr), however, I cannot figure out what. Thanks in advance for your help!
Disch (13742)
static members need to be instantiated.

Put this in the cpp file, like after your 'using namespace std' line:

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vector<vector<int> >* Radix::zeroArrayPtr;
vector<vector<int> >* Radix::negArrayPtr;


EDIT: wrong term.
Last edited on
ne555 (10692)
[joke]
¿what's worst than a multidimensional array?
A pointer to a multidimensional array

Oh my, those leaks. Better wrap it in an smart pointer
std::unique_ptr< std::vector<std::vector<int> > > zeroArrayPtr;
Much better
[/joke]

Seriously, ¿why don't you use objects?
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