#include <stdio.h>
int main(void)
{
    int year;
    printf("请输入一个年份");
    scanf(%d,&year);
    if(year%4==0 && year%100=0||year%400==0);
    {
         printf("%d年是闰年"，year);
     }
     else
     {
           printf("%d年不是闰年"，year);

      }
      return 0;
}