Hi can someone please explain this c++

1) ll Declare an array of whole numbers named length that holds up to 20 elements ll Declare variables item, max, and x that hold whole numbers I/ Prompt the user to enter number of lengths to be processed Il Get the value from the keyboard and assign it to max Il Set item to O I/ While (item is less than max) /IPrompt the user to enter a length I Get the value from the keyboard and assign it to length[item] Increment item // Display "The values entered displayed in reverse order are" / For (x-item-1 down to O) Print x,": "length[x 2) Modify the above program so that the entering of the data and the printing of the data in reverse order are done by a couple of functions called get_data) and print_data_reverse). Define the most appropriate parameter lists for the functions