定义一个带参数的宏，以判别某个年份是否为闰年。其中年份year应从键盘输入。 【源文件名】 ex406.c

#include <stdio.h>

#define IS_LEAP_YEAR(year) ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)

int main() {
    int year;
    printf("Please input a year: ");
    scanf("%d", &year);
    if (IS_LEAP_YEAR(year)) {
        printf("%d is a leap year.\n", year);
    } else {
        printf("%d is not a leap year.\n", year);
    }
    return 0;
}