题解 | 判断是不是字母

#include <stdio.h>

int main() 
{
    char ch;
    while (scanf(" %c", &ch) != EOF) //跳过一切空白字符
    {
        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();//吃掉回车符
    };

    return 0;
}