题解 | #判断是不是字母#

#include <stdio.h>

int main()
{
    char input=0;
    while((input=getchar())!=EOF)//判断每次输入是否有效
    {
        if(('a'<=input&&input<='z')||('A'<=input&&input<='Z'))//判别
        {
            printf("%c is an alphabet.\n",input);
        }
        else{
            printf("%c is not an alphabet.\n",input);
        }
        getchar();//吃掉输入的字符
    }
    return 0;
}