Date class to use: #ifndef DATE_H_ #define DATE_H_ #include #include using namespace std; class Date { friend ostream &operator<<( ostream &, const Date & ); private: int day; int month; int year; static const int days[]; // array of days per month void helpIncrement(); // utility function for incrementing date public: Date(int=1, int=1, int=0); void setDate(int,int,int); bool leapYear( int ) const; // is date in a leap year? bool endOfMonth( int ) const; // is date at the end of month? Date &operator++(); // prefix increment operator Date operator++( int ); // postfix increment operator const Date &operator+=( int ); // add days, modify object bool operator<(const Date&) const; void showdate(); }; const int Date::days[] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; Date::Date(int d, int m, int y) { day = d; month = m; year = y; // initialize static member at file scope; one classwide copy } // set month, day and year void Date::setDate( int dd, int mm, int yy ) { year = yy; month = ( mm >= 1 && mm <= 12 )? mm : 1; // test for a leap year if ( month == 2 && leapYear( year ) ) day = ( dd >= 1 && dd <= 29 ) ? dd : 1; else day = ( dd >= 1 && dd <= days[ month ] ) ? dd : 1; } // end function setDate // if the year is a leap year, return true; otherwise, return false bool Date::leapYear( int testYear ) const { if ( testYear % 400 == 0 || ( testYear % 100 != 0 && testYear % 4 == 0 ) ) return true; // a leap year else return false; // not a leap year } // end function leapYear // determine whether the day is the last day of the month bool Date::endOfMonth( int testDay ) const { if ( month == 2 && leapYear( year ) ) return testDay == 29; // last day of Feb. in leap year else return testDay == days[ month ]; } // end function endOfMonth // function to help increment the date void Date::helpIncrement() { // day is not end of month if ( !endOfMonth( day ) ) day++; // increment day else if ( month < 12 ) // day is end of month and month < 12 { month++; // increment month day = 1; // first day of new month } // end if else // last day of year { year++; // increment year month = 1; // first month of new year day = 1; // first day of new month } // end else } // end function helpIncrement // overloaded prefix increment operator Date &Date::operator++() { helpIncrement(); // increment date return *this; // reference return to create an lvalue } // end function operator++ // overloaded postfix increment operator; note that the // dummy integer parameter does not have a parameter name Date Date::operator++( int ) { Date temp = *this; // hold current state of object helpIncrement(); // return unincremented, saved, temporary object return temp; // value return; not a reference return } // end function operator++ // add specified number of days to date const Date &Date::operator+=( int additionalDays ) { for ( int i = 0; i < additionalDays; i++ ) helpIncrement(); return *this; // enables cascading } // end function operator+= // overloaded output operator ostream &operator<<( ostream &output, const Date &d ) { // static string monthName[ 13 ] = { "", "January", "February", // "March", "April", "May", "June", "July", "August", // "September", "October", "November", "December" }; // // output << d.day << " " << monthName[ d.month ] << " "<< d.year; output << setfill('0') << setw(2) << d.day << '/' << setw(2) << d.month << '/' << setw(4) << d.year; return output; // enables cascading } // end function operator<< bool Date::operator<(const Date& right) const { return (year < right.year || (year == right.year && month < right.month) || (year == right.year && month == right.month && day < right.day)); } void Date::showdate() { cout << "The date is "; cout << setfill('0') << setw(2) << day << '/' << setw(2) << month << '/' << setw(2) << year % 100 << endl; return; } #endif /* DATE_H_ */ Task 7.2 Write a program that randomly generates 100 dates and store them into a vector. Use the Date class provided in Task 7 .1. The dates generated must be within 1000 days after 1/1/2000.
Date class to use:
#ifndef DATE_H_
#define DATE_H_
#include <iostream>
#include <iomanip>
using namespace std;
class Date {
friend ostream &operator<<( ostream &, const Date & );
private:
int day;
int month;
int year;
static const int days[]; // array of days per month
void helpIncrement(); // utility function for incrementing date
public:
Date(int=1, int=1, int=0);
void setDate(int,int,int);
bool leapYear( int ) const; // is date in a leap year?
bool endOfMonth( int ) const; // is date at the end of month?
Date &operator++(); // prefix increment operator
Date operator++( int ); // postfix increment operator
const Date &operator+=( int ); // add days, modify object
bool operator<(const Date&) const;
void showdate();
};
const int Date::days[] =
{ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
Date::Date(int d, int m, int y) {
day = d;
month = m;
year = y;
// initialize static member at file scope; one classwide copy
}
// set month, day and year
void Date::setDate( int dd, int mm, int yy )
{
year = yy;
month = ( mm >= 1 && mm <= 12 )? mm : 1;
// test for a leap year
if ( month == 2 && leapYear( year ) )
day = ( dd >= 1 && dd <= 29 ) ? dd : 1;
else
day = ( dd >= 1 && dd <= days[ month ] ) ? dd : 1;
} // end function setDate
// if the year is a leap year, return true; otherwise, return false
bool Date::leapYear( int testYear ) const
{
if ( testYear % 400 == 0 ||
( testYear % 100 != 0 && testYear % 4 == 0 ) )
return true; // a leap year
else
return false; // not a leap year
} // end function leapYear
// determine whether the day is the last day of the month
bool Date::endOfMonth( int testDay ) const
{
if ( month == 2 && leapYear( year ) )
return testDay == 29; // last day of Feb. in leap year
else
return testDay == days[ month ];
} // end function endOfMonth
// function to help increment the date
void Date::helpIncrement()
{
// day is not end of month
if ( !endOfMonth( day ) )
day++; // increment day
else
if ( month < 12 ) // day is end of month and month < 12
{
month++; // increment month
day = 1; // first day of new month
} // end if
else // last day of year
{
year++; // increment year
month = 1; // first month of new year
day = 1; // first day of new month
} // end else
} // end function helpIncrement
// overloaded prefix increment operator
Date &Date::operator++()
{
helpIncrement(); // increment date
return *this; // reference return to create an lvalue
} // end function operator++
// overloaded postfix increment operator; note that the
// dummy integer parameter does not have a parameter name
Date Date::operator++( int )
{
Date temp = *this; // hold current state of object
helpIncrement();
// return unincremented, saved, temporary object
return temp; // value return; not a reference return
} // end function operator++
// add specified number of days to date
const Date &Date::operator+=( int additionalDays )
{
for ( int i = 0; i < additionalDays; i++ )
helpIncrement();
return *this; // enables cascading
} // end function operator+=
// overloaded output operator
ostream &operator<<( ostream &output, const Date &d )
{
// static string monthName[ 13 ] = { "", "January", "February",
// "March", "April", "May", "June", "July", "August",
// "September", "October", "November", "December" };
//
// output << d.day << " " << monthName[ d.month ] << " "<< d.year;
output << setfill('0')
<< setw(2) << d.day << '/'
<< setw(2) << d.month << '/'
<< setw(4) << d.year;
return output; // enables cascading
} // end function operator<<
bool Date::operator<(const Date& right) const {
return (year < right.year || (year == right.year && month < right.month) ||
(year == right.year && month == right.month && day < right.day));
}
void Date::showdate()
{
cout << "The date is ";
cout << setfill('0')
<< setw(2) << day << '/'
<< setw(2) << month << '/'
<< setw(2) << year % 100
<< endl;
return;
}
#endif /* DATE_H_ */
Task 7.2 Write a program that randomly generates 100 dates and store them into a
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