#include <iostream.h>
#include <stl.h>

struct odd : public unary_function<int, bool>
{
  odd () {}
  bool operator () (int n_) const { return (n_ % 2) == 1; }
};
 
struct positive : public unary_function<int, bool>
{
  positive () {}
  bool operator () (int n_) const { return n_ >= 0; }
};

int array [6] = { -2, -1 , 0, 1, 2, 3 };

int main ()
{
  int* p = find_if (array, array + 6, 
    compose2 (logical_and<bool> (), odd (), positive ()));
  if (p != array + 6)
    cout << *p << " is odd and positive" << endl;
  return 0;
}