闰年的判断

根据课本编写，自己添加了一丢丢

#include<stdio.h>
int main()
{
    int year,a;
    printf("请输入年份：\n");
    scanf_s("%d", &year);
    a = ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0);
    if (a == 1)
        printf("闰年\n");
    else
    
        printf("不是闰年\n");

        
    return 0;
}