There is one problem with our vowel-counting program as we've implemented it: It
doesn't count capital letters as vowels. Write a program that counts both lower-
and uppercase letters as the appropriate vowel -- that is, your program should
count both 'a' and 'A' as part of aCnt, and so forth.
Exercise 5.09 presents a solution using if statements. See 10.cc for a
solution using switch.