class X {};
  class Y {};
  
  int main(int argc, char** argv)
  {
    int i = 3;
  
    X x;
    Y y;
  
    X* xp;
    Y* yp;
  
    // Need reinterpret cast to perform pointer conversion from unrelated classes
    // static_cast doesn't work
    xp = reinterpret_cast<X*>(yp);
  
    // Need reinterpret_cast to go from pointer to int and from int to pointer
    i = reinterpret_cast<int>(xp);
    xp = reinterpret_cast<X*>(i);
  
    // Need reinterpret cast to perform reference conversion from unrelated
    // classes --  static_cast doesn't work
    X& xr = x;
    Y& yr = reinterpret_cast<Y&>(x);
  
    return (0);
  }