A full C++ program that contains a function isVowel returns the value true if a given character is a vowel and otherwise returns false

isVowelFull.cpp

// www.abukhleif.com
#include <iostream>
using namespace std;
bool isVowel (char x) {
	char y = toupper(x);
	return (y=='A' || y=='E' || y=='I'|| y=='O'|| y=='U');
}
int main() {
	cout<< isVowel('a');
	return 0;
}