闰年：

                1、能被4整除不能被100整除

                2、能被400整除

#define _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>
int main()
{
	int year;
	for(year = 1000; year <= 2000; year++)
	{
		if((year%4 == 0) && (year%100!=0) || (year%400 == 0))
		{
			printf("%d ",year);
		}
	}
	return 0;
}