#include <algorithm>
#include <iostream>
#include <vector>

using namespace std;

template<typename T>
struct DeleteObject: public unary_function<const T*, void> {
  void operator()(const T* ptr) const
  {
    delete ptr;
  }
};

class Widget {
 public:
  int gizmo;
  int sprog;
  static int number;

  Widget( int Gizmo=0, int Sprog=0) : gizmo(Gizmo), sprog(Sprog) {
    number++;
  }
  ~Widget() {
    number--;
  }
};

int Widget::number;

vector<Widget*> vwp;

void MakeWidgets() {
  int i;
  for (i=0;i<100;i++) {
    vwp.push_back( new Widget);
  }
}

void UnmakeWidgets() {
  for_each( vwp.begin(), vwp.end(), DeleteObject<Widget>());
  vwp.clear();
}

int main() {
  cout << "Widget::number = " << Widget::number << endl;
  MakeWidgets();
  cout << "Widget::number = " << Widget::number << endl;
  UnmakeWidgets();
  cout << "Widget::number = " << Widget::number << endl;
  return 0;
}