题解 | 判断是不是字母

#include <stdio.h>

int main() {
    char a, b;
    while (scanf("%c", &a) != EOF) {
        getchar();
        if (a >= 'a' && a <= 'z' || a >= 'A' && a <= 'Z')
            printf("%c is an alphabet.\n", a);
        else printf("%c is not an alphabet.\n", a);
    }
    return 0;
}