题解 | #判断是不是字母#

#include <stdio.h>
#include <ctype.h>

int main()
{
    char ch = 0;
    while (~scanf(" %c", &ch))
    {
        if (isalpha(ch))
        {
            printf("%c is an alphabet.\n", ch);
        }
        else
        {
            printf("%c is not an alphabet.\n", ch);
        }
    }
    
    return 0;
}