//--------------------------------------------------------------------
//
//  Laboratory 1                                           logbook.h
//
//  Class declaration for the Logbook ADT
//
//--------------------------------------------------------------------

class Logbook
{
  public:

    // Constructor
    Logbook ( int month, int year );        // Create a logbook

    // Logbook marking operations
    void putEntry ( int day, int value );   // Store entry for day
    int getEntry ( int day ) const;         // Return entry for day

    // General operations
    int month () const;                     // Return the month
    int year () const;                      // Return the year
    int daysInMonth () const;               // Number of days in month

    // In-lab operations
    void displayCalendar () const;          // Display as calendar
    Logbook ();                             // Default constructor
    void putEntry ( int value );            // Store entry for today
    int operator [] ( int day ) const;      // Return entry for day
    void operator += ( const Logbook &rightLogbook );
                                            // Combine logbooks
  private:

    // Facilitator (helper) function
    int leapYear () const;                  // Leap year?

    // In-lab facilitator function
    int dayOfWeek ( int day ) const;        // Return day of the week

    // Data members
    int logMonth,     // Month covered by logbook
        logYear,
        entry [31];   // Logbook entries
};