/*判斷所輸入的年份是否為閏年*/
main()
{
	int year，leap;
	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 is”,year);
	else 
		printf(%d is not a leap year.”,year);
}