C++: Write a program that prompts the user to enter a length in feet and then enter a length in inches and outputs the equivalent length in centimeters. If the user enters a negative number or a non-digit number, throw and handle an appropriate exception and prompt the user to enter another set of numbers. Your error message should read A non positive number is entered and allow the user to try again. Format your output with setprecision(2) to ensure the proper number of decimals for testing!