DateTime Class Reference

#include <datetime.h>

Public Member Functions
	DateTime ()
	DateTime (int mm, int dd, int yy, int h, int m, string period)
bool	operator== (const DateTime &dt) const
bool	operator!= (const DateTime &dt) const
bool	operator< (const DateTime &dt) const
bool	operator> (const DateTime &dt) const
void	setDate (int mm, int dd, int yy)
void	setTime (int h, int m, string period)

Private Member Functions
unsigned long	toLong () const

Private Attributes
int	mm
int	dd
int	yy
int	h
int	m
string	period

Friends
ostream &	operator<< (ostream &out, const DateTime &dt)
istream &	operator>> (istream &in, DateTime &dt)

Detailed Description

A class for storing dates and times. Dates are in the format MM/DD/YY, and times are in the twelve-hour format, HH:MM [AM|PM].

Author

Mark Maloof (maloof at cs georgetown edu)

Version

1.1, 11/28/12

1.2, 01/08/20

Constructor & Destructor Documentation

DateTime::DateTime

(

)

Default constructor. Sets a defalt object to "01/01/00 12:00 AM".

DateTime::DateTime	(	int	mm,
		int	dd,
		int	yy,
		int	h,
		int	m,
		string	period
	)

Explicit constructor. Sets the date and time to the passed values. Indirectly throws an exception if passed invalid values.

Parameters

mm	the month, an int value in [1, 12]
dd	the day, an int value in [1, 28, 30, 31], depending on the month
yy	the year, an int value in [0, 99]
h	the hour, an int value in [1, 12]
m	the minute, an int value in [0, 59]
period	the period, a string value of either "AM" or "PM"

Exceptions

invalid_argument

if an argument's value is invalid

Member Function Documentation

bool DateTime::operator!=

(

const DateTime &

dt

)

const

Returns true if this DateTime object is not equal to DateTime object passed as the parameter; returns false otherwise.

Parameters

dt	the DateTime object to be compared

Returns

the bool indicating whether the objects are equal

bool DateTime::operator<

(

const DateTime &

dt

)

const

Returns true if this DateTime object is less than (i.e., earlier than) the DateTime object passed as the parameter; returns false otherwise.

Parameters

dt	the DateTime object to be compared

Returns

the bool indicating whether this object is less than the parameter

bool DateTime::operator==

(

const DateTime &

dt

)

const

Returns true if this DateTime object is equal to DateTime object passed as the parameter; returns false otherwise.

Parameters

dt	the DateTime object to be compared

Returns

the bool indicating whether the objects are equal

bool DateTime::operator>

(

const DateTime &

dt

)

const

Returns true if this DateTime object is greater than (i.e., later than) the DateTime object passed as the parameter; returns false otherwise.

Parameters

dt	the DateTime object to be compared

Returns

the bool indicating whether this object is greater than the parameter

void DateTime::setDate	(	int	mm,
		int	dd,
		int	yy
	)

Sets the date portion of this object. Directly throws an exception if passed invalid values.

Parameters

mm	the month, an int value in [1, 12]
dd	the day, an int value in [1, 28, 30, 31], depending on the month
yy	the year, an int value in [0, 99]

Exceptions

invalid_argument

if an argument's value is invalid

void DateTime::setTime	(	int	h,
		int	m,
		string	period
	)

Sets the time porition of this object. Directly throws an exception if passed invalid values.

Parameters

h	the hour, an int value in [1, 12]
m	the minute, an int value in [0, 59]
period	the period, a string value of either "AM" or "PM"

Exceptions

invalid_argument

if an argument's value is invalid

unsigned long DateTime::toLong ( ) const

private

Converts a DateTime object to an unsigned long for the purpose of comparison. Implementing this method is optional, as there are other methods for comparing dates and times.

Returns

an unsigned long that is equivalent to the date and time

Friends And Related Function Documentation

ostream& operator<< ( ostream &  out, const DateTime &  dt  )

friend

Inserts a DateTime object in the format "MM/DD/YY HH:MM [AM|PM]" into the output stream, and returns the modified output stream.

Parameters

out	the output stream for insertion
dt	the DateTime object for insertion

Returns

the modified output stream

istream& operator>> ( istream &  in, DateTime &  dt  )

friend

Extracts a DateTime object in the format "MM/DD/YY HH:MM [AM|PM]" from the input stream, and returns the modified input stream. Sets the fail bit of the input stream if the object is improperly formatted. Indirectly throws an exception if a value in the stream is invalid.

Parameters

in	the input stream for extraction
dt	the DateTime object for storing the extracted information

Returns

the modified input stream

Exceptions

invalid_argument

if an argument's value is invalid

Member Data Documentation

int DateTime::dd

private

the day of the month

int DateTime::h

private

the hour of the day

int DateTime::m

private

the minute of the hour

int DateTime::mm

private

the month of the year

string DateTime::period

private

the period of the day

int DateTime::yy

private

the year

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The documentation for this class was generated from the following files:

• datetime.h
• datetime.cc