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