#include <iostream>

using namespace std;

class Foo
{
public:
  int a;
  Foo ( void );
  ~Foo ( void );
};
Foo::Foo ( void )
{
  a = 1;
}
Foo::~Foo ( void )
{
  if ( 1 == a )
  {
    throw 0;
  }                 //违背1
}

int main ( void )
{
  try
  {
    Foo f;
  }
  catch ( int e )
  {
    //......
  }

  return ( 0 );
}