#include <iostream>

using namespace std;

int main ( void )
{
  char *p = NULL;

  try
  {
    throw ( p );                                      //遵循1
    throw ( static_cast < const char * > ( NULL ) );  //遵循2
  }
  catch ( int )
  {
    //...
  }
  catch ( const char * )
  {
    //...
  }

  return ( 0 );
}