C++ programming.

Create a program that reads in an arbitrary number of characters from the user. You should store the characters as a single string. At the sentinel value of 0 (zero), print the complete string, capitalizing only vowels (a, e, i, o, u) and making every other character lowercase. You must use a do-while loop (to accept each character) and a switch statement (to process each character). Your programs output should be formatted as follows: Enter a character: a

Enter a character: l

Enter a character: v

Enter a character: i

Enter a character: n

Enter a character: 0

Your string: AlvIn