题解 | #判断是不是字母#

int main(){
   char ch;
    while(scanf("%c",&ch)!=EOF){
        getchar();//用于吃掉每个数据末尾的\n
            //getchar是去缓冲区里面读一个字符并且拿走。
        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);
    }
    return 0;
}

int main(){
   char ch;
    //%c的前面加空格的意思就是跳过下一个字符之前的所有空白字符
    
    while(scanf(" %c",&ch)!=EOF){

        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);
    }
    return 0;
}