Write a Program to Count the Number of Vowels 

C++// C++ Program to count the number of vowels #include <cstring> #include <iostream> using namespace std; int main() { string str = "GeeksforGeeks to the moon"; int vowels = 0; for (int i = 0; str[i] != '\0'; i++) { if (str[i] == 'a' || str[i] == 'e' || str[i] == 'i' || str[i] == 'o' || str[i] == 'u' || str[i] == 'A' || str[i] == 'E' || str[i] == 'I' || str[i] == 'O' || str[i] == 'U') { vowels++; } } cout << "Number of vowels in the string: " << vowels << endl; return 0; }

Output

Number of vowels in the string: 9