okay, I'm trying to do part 2 of this...and I'm just not understanding c++. I have to prompt user to input sequence of letters and output the number of vowels, here's my botch job, I have no clue where to go.
using namespace std;
"letter" has no way of getting into the function isVowel unless it is passed as a parameter. Use cin >> to get the user's input and assign it to letter. Then make a call to the function isVowel(letter) and output the return value.