// Crea la struttura Time 
#include <iostream>
using namespace std; 
#include <iomanip>

// structure definition
 struct Time {
 public:  // non e' necessario perche' senza specificatore si ha public !!
   void set_values(int, int, int);
   int ore() {return (hour);};
   int minuti() {return (minute);};
   int secondi() {return (second);};
 private:
   int hour; // 0-23 (24-hour clock format)
   int minute; // 0-59
   int second; // 0-59
 }; // end struct Time

void Time::set_values (int a, int b, int c){
  hour = a;
  minute = b;
  second = c;
}

 void printUniversal ( Time & ); 
 void printStandard  ( Time & ); 


int main() {
  Time dinnerTime; 
  dinnerTime.set_values(18,30,0);
  cout << "Dinner will be held at ";

  printUniversal( dinnerTime );//struttura passata per riferimento ad una funzione
  cout << " universal time, \n which is ";
  
  printStandard( dinnerTime );
  cout << " standard time." << endl;
  return (0);
 } // end main

// print time in universal-time format
void printUniversal(  Time& t )
 {
   cout << setfill( '0' ) << setw( 2 ) << t.ore() << ":"
	<< setw( 2 ) << t.minuti() << ":"
	<< setw( 2 ) << t.secondi();
    } 
 

 // print time in standard-time format
 void printStandard( Time &t ) {
   cout << ( ( t.ore() == 0 || t.ore() == 12 ) ?
	     12 : t.ore() % 12 ) << ":" << setfill( '0' )
	<< setw( 2 ) << t.minuti() << ":"
	<< setw( 2 ) << t.secondi()
	<< ( t.ore() < 12 ? " AM" : " PM" );
} 

//g++ -o Struct_Time Struct_Time.cc
//./Struct_Time
// Dinner will be held at 18:30:00 universal time,
// which is 6:30:00 PM standard time.