Listing 2: UDouble constructors and destructor

//  This  is  the  default  conversion  from  type  double
UDouble::UDouble(const  double  val  =  0.0,  const  double  unc  =  0.0)
      :  value(val),  uncertainty(unc)
{
   if  ((unc  <  0.0)  &&  !is_correlated)
   {
      cerr  <<  "Error:  negative  uncertainty:  "  <<  unc  <<  endl;
      exit(EXIT_FAILURE);
   }
}
UDouble::UDouble(const  UDouble&  ud)
       :  value(ud.value),  uncertainty(ud.uncertainty)  {}

UDouble::~UDouble(void)  {}

//End of File