题解 | #判断是不是字母#

#include<stdio.h>
#include<string.h>
int main() {
    char ch;
    while ((ch = getchar()) != EOF) {
        if (ch != '\n') {  //要判断是否是换行
            if (ch >= 'A' && ch <= 'z')
                printf("%c is an alphabet.\n", ch);
            else
                printf("%c is not an alphabet.\n", ch);
        }

    }
}