题解 | #判断是不是字母#

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

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