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// Fig. 7.7: date1.cpp
// Member-function definitions for class Date.
#include <iostream>
using std::cout;
using std::endl;
// include Date class definition from date1.h
#include "date1.h"
// constructor confirms proper value for month; calls
// utility function checkDay to confirm proper value for day
Date::Date( int mn, int dy, int yr )
{
if ( mn > 0 && mn <= 12 ) // validate the month
month = mn;
else { // invalid month set to 1
month = 1;
cout << "Month " << mn << " invalid. Set to month 1.\n";
}
year = yr; // should validate yr
day = checkDay( dy ); // 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
// print Date object in form month/day/year
void Date::print() const
{
cout << month << '/' << day << '/' << year;
} // 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[ 13 ] =
{ 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 << "Day " << testDay << " invalid. Set to day 1.\n";
return 1; // leave object in consistent state if bad value
} // end function checkDay
/**************************************************************************
* (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice *
* Hall. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
*************************************************************************/
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