// Fig. 10.11: Date.cpp
// Date class member-function definitions.
#include <iostream>
#include "Time.h" // include Time class definition
#include "Date.h" // include Date class definition
using namespace std;
// constructor confirms proper value for month; calls
// utility function checkDay to confirm proper value for day
Date::Date( int month, int day, int year, Time time)
{
if ( month > 0 && month <= monthsPerYear ) // validate the month
month = month;
else
{
month = 1; // invalid month set to 1
cout << "Invalid month (" << month << ") set to 1.\n";
} // end else
time = time;
year = year; // could validate year
day = checkDay( day ); // validate the day
// output Date object to show when its constructor is called
cout << "Date object constructor for date ";
print();
cout << endl;
} // end Date constructor
void Date::increaseADay()
{
static const int daysPerMonth[ monthsPerYear + 1 ] =
{ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
if (day + 1 <= daysPerMonth[month]) //check to see if the added day will
//put the date over the month limit
//as defined by daysPerMonth.
day++; //add one to day if the above check passes
else
{day = 1; //else, reset day to 1 and check below.
//If month is december, reset month to
//january and add one to the year.
if (month == 12)
{month = 1;
year++;}
else
month++;
}//end function increaseADay */
}
void Date::tick()
{
time.setSecond( time.getSecond() + 1 ); // increment second by 1
if ( time.getSecond() == 0 )
{
time.setMinute( time.getMinute() + 1 ); // increment minute by 1
if ( time.getMinute() == 0 )
{
time.setHour( time.getHour() + 1 ); // increment hour by 1
if ( time.getHour() == 0 )
{
increaseADay(); // call function to increment day by 1.
}// end if
} // end if
} // end if
} // end function tick
// print Date object in form month/day/year time/time 24hr
void Date::print() const
{
cout << "\n" << month << '/' << day << '/' << year;
time.printStandard();
time.printUniversal();
} // end function print
// output Date object to show when its destructor is called
Date::~Date()
{
cout << "Date object destructor for date ";
print();
cout << endl;
} // end ~Date destructor
// utility function to confirm proper day value based on
// month and year; handles leap years, too
int Date::checkDay( int testDay ) const
{
static const int daysPerMonth[ monthsPerYear + 1 ] =
{ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
// determine whether testDay is valid for specified month
if ( testDay > 0 && testDay <= daysPerMonth[ month ] )
return testDay;
// February 29 check for leap year
if ( month == 2 && testDay == 29 && ( year % 400 == 0 ||
( year % 4 == 0 && year % 100 != 0 ) ) )
return testDay;
cout << "Invalid day (" << testDay << ") set to 1.\n";
return 1; // leave object in consistent state if bad value
} // end function checkDay
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