题解 | #判断是不是字母#

#include <stdio.h>
int main() {
    char a;
    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;
}