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

// structure definition
 struct Time {
   int hour; // 0-23 (24-hour clock format)
   int minute; // 0-59
   int second; // 0-59
 }; // end struct Time

 void printUniversal( const Time & ); // prototype
 void printStandard( const Time & ); // prototype


int main() {
  Time dinnerTime; 
  dinnerTime.hour = 18; // set hour member of dinnerTime
  dinnerTime.minute = 30; // set minute member of dinnerTime
  dinnerTime.second = 0; // set second member of dinnerTime
  cout << "Dinner will be held at ";
  printUniversal( dinnerTime );//struttura passata per riferimento ad una funzione
  cout << " universal time,\nwhich is ";

  printStandard( dinnerTime );
  cout << " standard time.\n";
  cout << endl;
  return 0;
 } // end main

// print time in universal-time format
 void printUniversal( const Time &t )
 {
  cout << setfill( '0' ) << setw( 2 ) << t.hour << ":"
   << setw( 2 ) << t.minute << ":"
    << setw( 2 ) << t.second;
  } 

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

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