Add the following member function to the ADT class Digital Time defined in Displays 12.1 a...

Add the following member function to the ADT class Digital Time defined in Displays 12.1 and 12.2:

void DigitalTime::interval_since(const DigitalTime& a_previous_time, int& hours_in_interval, int& minutes_in_interval) const

This function computes the time interval between two values of type DigitalTime. One of the values of type DigitalTime is the object that calls the member function i nterval_si nee, and the other value of type DigitalTime is given as the first argument. For example, consider the following code:

DigitalTime current(5, 45), previous(2, 30);

int hours, minutes;

current.interval_since(previous, hours, minutes);

cout « “The time interval between “ « previous

« “ and “ « current « endl « “is “ « hours « “ hours and

 “ « minutes « “ minutes.\n”;

In a program that uses your revised version of the DigitalTime ADT, this code should produce the following output:

The time interval between 2:30 and 5:45 is 3 hours and 15 minutes.

Allow the time given by the first argument to be later in the day than die time of the calling object. In this case, the time given as the first argument is assumed to be on the previous day. You should also write a program to test this revised ADT class