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