C / C++ / MFC

#include <iostream>
using namespace std;

class Planet
{
private:
  double _dFactor;

public:
  Planet(double dFactor = 1.0) : _dFactor(dFactor) {} 

  double localWeight(double dWeightOnEarth)
  {
    return dWeightOnEarth * _dFactor;
  }
};
void main()
{
  Planet planetEarth, planetMercury(.38);
  double dYourWeight = 235.6;

  cout << "If your weight on Earth is " << planetEarth.localWeight(dYourWeight) << endl;
  cout << "then weight on Mercury is " << planetMercury.localWeight(dYourWeight) << endl;
}

CEarth earth;
CMercury mercury;
double weight;

weight = earth.GetWeight (100);
cout << "100 kg on earth is : " << weight << endl;
weight = mercury.GetWeight (100);
cout << "100 kg on mercury is : " << weight << endl;

CPlanet *planet = GetNthPlanet (5);
double weight;
weight = planet->GetWeight (100);
cout << "100 kg on 5th planet is : " << weight << endl;

delete planet;

CPlanet *GetNthPlanet (int n)
{
  switch (n)
  {
  case 1:  return new CMercury;
  case 2:  return new CVenus;
  // and so on
  case 9:
    if ( (rand() %100) < 10)
      return CPluto;
    else
      return CPlanetoid;
  }
  return NULL; // FAIL!
}

#include "uxtheme.h"
#pragma comment(lib, "uxtheme.lib")

...

if(IsThemeActive())
{
  //Themes are active;
}