题解 | #判断是不是字母#

#include <stdio.h>

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

    return 0;
}