Time---CPP-Class

Defining class in C++

Task 1 - Class definition

Create a class named Time that contains integer fields for hours, minutes and seconds. The hours should be stored in military time (24-hours format), that is, 0 through 23. User must be able to perform following operations:

• Get and set current hour, minute and second
• Add a function that displays the universal time in 24-hours format, using a colon to separate hours, minutes and seconds. For example 3 o’clock evening should be displayed as 15:00:00
• Add a function that displays the standard time in 12-hours format, using a colon to separate hours, minutes and seconds followed by AM/PM accordingly. For example 3 o’clock evening should be displayed as 03:00:00 PM
• Add another function that takes an argument as minutes to be added to the time. This function increments by x number of minutes in current time. For example, 12:30 plus 15 is 12:45, 14:50 plus 20 is 15:10, and 23:59 plus 2 is 0:01.
• The arguments in Time constructor for hours, minutes and seconds are optional. All three values initialize to default time if no argument is supplied.
• The constructor and setter functions ensure that the hours field is not greater than 23 and that the minutes and second fields are not greater than 59; default to these maximum values if the arguments to the constructor are out of range.
• Set default time to a specific time e.g. 15:45:00

Create a main( ) function that instantiates an array of at least four Time objects and demonstrates that they display correctly both before and after varying amounts of time have been added to them.

Task 2 - Operator Overloading

For the above Time class, perform following additional operations:

• Overload the stream insertion << operator to display current time on screen. e.g.

Time t1(8, 20, 10); 
cout << t1; // will display 08:20:10

• Overload operator = that interchanges (swap) two time values. e.g.

Time t1(8, 20, 10), t2(3, 40, 34); 
t1 = t2; 
cout << t1; // will display 03:40:34 
cout << t2; // will display 08:20:10

• Overload the pre and post increment operator for this class so that it adds 1 hour to the current time value. Minutes and hours remain unchanged. e.g.

Time t1(8, 20, 10); 
t1++; // or ++t1; 
cout << t1; // will display 09:20:10

Create a main( ) function to demonstrate the above 3 features of the Time class.

Task 3 - Inheritance & Operator Overloading

Create a class named Alarm inherited from class Time of Tasks 1 & 2 that contains integer data for volume, and string for alarm type. The volume level can be set from 0 to 5. The alarm type can be set to: "Melody", "Vibration", "Melody+Vibration":

• Overload the stream extraction >> operator to set the alarm. e.g.

Alarm a1;
cin >> a1;     // will set alarm a1 according to the user input

• Overload subscript operator [ ] that takes integer value to set volume in valid range (0-5). e.g.

a1[0];  // will mute the alarm
a1[5];  // will set the maximum possible volume level

• Write the code for type conversion from Time to Alarm and vice versa.