【C】#判断是元音还是辅音#

#include <stdio.h>
#include <string.h>

int main() {
    char arr[] = "AEIOUaeiou";
    char letter;
    while (scanf("%c", &letter) != EOF) {
        if (strchr(arr, letter)) {
            printf("Vowel\n");
            getchar();
        } else {
            printf("Consonant\n");
            getchar();
        }
    }
    return 0;
}