判断一个年份是否为闰年

#include <stdio.h>

int main() {

    int year = 2020;

    if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {

        printf("%d is a leap year\n", year);

    } else {

        printf("%d is not a leap year\n", year);

    }

    return 0;

}