//--------------------------------------------------------------------
//
//  Laboratory 1                                         logbook.cpp
//
//  SOLUTION: Implementation of the Logbook ADT
//
//--------------------------------------------------------------------

#include <iostream.h>
#include <iomanip.h>
//#include <dos.h>
#include "logbook.h"

//--------------------------------------------------------------------

Logbook::Logbook ( int month, int year )

// Constructor. Creates an empty logbook for the specified month.

  : logMonth(month),
    logYear(year)
{
    int j;   // Loop counter

    for ( j = 0 ; j < 31 ; j++ )
        entry[j] = 0;
}

//--------------------------------------------------------------------

void Logbook::putEntry ( int day, int value )

// Stores entry for the specified day.

{
    entry[day-1] = value;
}

//--------------------------------------------------------------------

int Logbook::getEntry ( int day ) const

// Returns entry for the specified day.

{
    return entry[day-1];
}

//--------------------------------------------------------------------

int Logbook::month () const

// Returns the logbook month.

{
   return logMonth;
}

//--------------------------------------------------------------------

int Logbook::year () const

// Returns the logbook year.

{
   return logYear;
}

//---------------------------------------------------------------------

int Logbook::daysInMonth () const

// Returns the number of days in the logbook month.

{
    int result;   // Result returned

    switch ( logMonth )
    {
      case 4 : case 6 : case 9 : case 11 :
           result = 30;
           break;
      case 2 :
           if ( leapYear() )
              result = 29;
           else
              result = 28;
           break;
      default :
           result = 31;
    }

    return result;
}

//--------------------------------------------------------------------

int Logbook::leapYear () const

// If the logbook month occurs during a leap year, then returns 1.
// Otherwise, returns 0.

{
    return ( logYear % 4 == 0   &&
             ( logYear % 100 != 0  ||  logYear % 400 == 0 )  );
}