题解 | #判断是不是字母#

#include <stdio.h>

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