Beispiel für Exceptions:

#include <iostream.h>

int main()
{
  int i;
  cout << "Bitte Zahl eingeben:" << endl;
  try 
  {
    cin >>i;
    if (i == 1) throw "ONE";
    if (i == 3) throw "THREE";
    if (i < 0) throw -1;
  }
  
  catch(char *str)
  {
    cout << "Exception:" << str << endl;
    return 1;
  }

  catch(int j)
  {
    if ( j < 0 )
      cout << "BELOW NULL" << endl;
  }
}

// g++ -fhandle-exceptions