#include "oechem.h"
#include <iostream>

using namespace OESystem;
using namespace OEChem;
using namespace std;

bool MyMolIsEmpty(OEMolBase &mol)
{
  return mol.GetAtoms()? false : true;
}

unsigned int MyNumAtoms(OEMolBase &mol)
{
  OEIter<OEAtomBase> atom;
  unsigned int result = 0;

  for (atom = mol.GetAtoms(); atom; ++atom)
   ++result;
  return result;
}

unsigned int MyNumBonds(OEMolBase &mol)
{
  OEIter<OEBondBase> bond;
  unsigned int result = 0;

  for (bond = mol.GetBonds(); bond; ++bond)
    ++result;
  return result;
}

int main() 
{
  OEMol mol;
  OEParseSmiles(mol, "c1ccccc1");
  if (!MyMolIsEmpty(mol))
  {
    cerr << "num atoms: " << MyNumAtoms(mol) << endl;
    cerr << "num bonds: " << MyNumBonds(mol) << endl;
  }
  return 0;
}