Use of C++ program, Thank you very much

Program 3. Write a program that converts a time in 12-hour format to 24-hour format. The program will prompt the user to enter a time in HH:MM:SS AM/PM form. It will then convert the time to 24 hour form. You may use a string type to read in the entire time at once including the space or you may choose to use separate variables for the hours, minutes, seconds and AM/PM. Show output for each of the examples below. Examples: Output Input AM/PM24-Hour 5:30:00 PM 17:30:00 6:45:50 AM 06:45:50 12:32:30 AM 00:32:30 12:15:18 PM 12:15:18 1:02:22 PM 13:02:22