vowel.cpp

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/*
   This program prompts the user to input a sequence of characters and outputs the number of vowels
*/
 
#include <iostream>
#include <string>
using namespace std;
 
bool isVowel(char a){
    string vowels = "A E I O U a e i o u";
    // string.find(char) will return string::npos if not found
    // first character is index 0
    return vowels.find(a) != string::npos;
}
 
 
int main()
{
    int n;
    int numVowel = 0;
    char c;
    cin >> n;
 
    for (int i = 0; i < n; ++i)
    {
        cin >> c;
        if (isVowel(c))
            numVowel++;
    }
 
    cout << "Number of vowels = " << numVowel << endl;
 
    return 0;
}