Check how many lowercase vowels occured in C++

 #include <iostream>

#include <cstring>

int main()

{

#include <iostream>

using namespace std;

bool isVowel(char ch) {

    return ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u';

}

void countLowercaseVowels(string word) {

    int vowelCount = 0;

    for (char ch : word) {

        if (isVowel(ch)) {

            vowelCount++;

        }

    }

    cout << "Number of lowercase vowels in \"" << word << "\": " << vowelCount << endl;

}

int main() {

    string input;

    cout << "Enter a word: ";

    cin >> input;

    countLowercaseVowels(input);

    return 0;

}

return 0;

}