Overload the

a)

ostream & operator(ostream>

Output the human-readable time to the output stream out.

b)

string to_string(clock_time c)

Return the human-readable time as a string.

The class clock_time returns hours, minutes and seconds (e.g h=12 ,m=50,s=30).The human-readable representation/string representation of a clock_time object is the time as it would appear on a 24-hour clock. That is, it would appear as h:mm:ss, where h is the natural representation of the hour (not padded), while mm is the minutes past the hour,left padded with zeroes if necessary to ensure it has two digits, and ss is similarly the number of seconds past the minute, left padded with zeroes. Use setw() and setfill() stream manipulators; the to_string function then can be written using an ostringstream obj