#include <iostream>
using namespace std;

class UnluckyNumber : public exception
{
public:
  UnluckyNumber(const char* msg) { mMsg = msg; }
  virtual const char* what() const throw() { return mMsg; }

private:
  const char* mMsg;
};

class Cow
{
public:
  Cow() { cout << "Moo!" << endl; }
  ~Cow() { cout << "x_x" << endl; }
};


int pickANumber(int n)
{
  cout << "entering pickANumber()" << endl;
  Cow c;

  if(n % 2 == 0){
    throw UnluckyNumber("That is not a good number.");
  }
  if(n % 7 == 0){
    throw UnluckyNumber("That's a terrible number!");
  }
  if(n % 13 == 0){
    throw -1;
  }

  cout << "exiting pickANumber()" << endl;
  return n;
}


int main(int argc, char* argv[])
{
  //cout << "The first number is..." << pickANumber(5) << endl;

  try {
    cout << "The second number is..." << pickANumber(2) << endl;
    //cout << "Now let's try 13: " << pickANumber(13) << endl;
  }
  catch (UnluckyNumber& e) {
    cout << "whew, that didn't work: " << e.what() << endl;
  }
  catch (exception& e) {
    cout << "whew, caught an exception: " << e.what() << endl;
  }
  catch (int& e) {
    cout << "uh, why did you throw that??" << e << endl;
  }

  return(0);
}