Separation compilation problem ; C/C++?

I'm just beginner in c++ and seek for help. I learn about separate compilation.Try to observe files below:





Poji1.h





#ifndef POJI1_SPEC


#define POJI1_SPEC





class Poji1 {


public:


Poji1();


void ConvToCent(double* temp);





private:


int j;





};





Poji1.cpp





#include %26lt;iostream%26gt;


#include "Poji1.h"





Poji1::Poji1()


{


j=0;


}





void Poji1::ConvToCent(double* temp)


{


int j;


for(j=0; j%26lt;6; j++)


{


*temp++ *=2.54;


}


}





lain.cpp





#include %26lt;iostream.h%26gt;


#include "Poji1.h"





void main()


{


double dblarr[6]={21.0,32.1,43.2,54.3,65.4,76.5...


int j;


Poji1 P;


for (j=0; j%26lt;6; j++)


{


cout%26lt;%26lt;endl%26lt;%26lt;"dblarr["%26lt;%26lt;j%26lt;%26lt;"]="%26lt;%26lt;dblarr...


}


P.ConvToCent(dblarr);


for(j=0; j%26lt;6; j++)


{


cout%26lt;%26lt;endl%26lt;%26lt;"dblarr["%26lt;%26lt;j%26lt;%26lt;"]="%26lt;%26lt;dblarr...


}





}





The errors are:


%26gt;ch -u ./lain.cpp


ERROR: member function '::Poji1()' not defined


at line 8 and ERROR: member function '::ConvToCent()' not defined at line 13 in file C:\Documen. Help!

Separation compilation problem ; C/C++?
need to make your functions public.
Reply:Kai says he's not going to answer that question
Reply:Just two hints. 1. C++ object members are private by default, not public. 2. When you use multiple files look up the extern key word.





I won't say any more, lest this be for a class.