#include <iostream>

using namespace std;

int main()

{

    char c;

    int isLowercaseVowel, isUppercaseVowel;

    cout << "输入一个字母: ";

    cin >> c;

    // 小写字母元音

    isLowercaseVowel = (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u');

    // 大写字母元音

    isUppercaseVowel = (c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U');

    // if 语句判断

    if (isLowercaseVowel || isUppercaseVowel)

        cout << c << " 是元音";

    else

        cout << c << " 是辅音";

    return ;

}