C / C++ / MFC

class Cube
{
public:
--data members declaration.....

public:
 Cube()
 {
 }
 void set_values(double x, double y, int z)
 {
 }
 void set()
 {
 }
 void process()
 {
 }
 int check(int i, int j)
 {
 }
};

class Cube
{
public:
--data members declaration.....

public:
Cube();
void set_values(double x, double y, int z);
void set();
void process();
int check(int i, int j);
};

#include "geom.h"

Cube::Cube()
{
}
void Cube::set_values(double x, double y, int z)
{
}
void Cube::set()
{
}
void Cube::process()
{
}
int Cube::check(int i, int j)
{
}

#include "geom.h"

class ABC
{
 public:
   static int counter;
 private:
   [some members]
 public
   ABC();
   ~ABC();
   [some methods]
};

int ABC::counter = 0;

ABC::ABC
{ 
 counter++;
}
ABC::~ABC
{
 counter--;
}

#include "test.h"
void main (void)
{
 ABC obj1,obj2,obj3;
 cout<<ABC::counter;
}