题解 | #判断是不是字母#

#include<stdio.h>
//A-Z == 65-90
//a-z == 97-122
//\n == 10
int main() {
    char ar;
    while (scanf("%c", &ar) != EOF) {
        if (ar == 10) continue;
        if (ar >= 65 && ar <= 90 || ar >= 97 && ar <= 122)
            printf("%c is an alphabet.\n", ar);
        else printf("%c is not an alphabet.\n", ar);
    }
    return 0;
}