闰年判别

沸腾的火焰

#include <stdio.h>
void main()
{
a:int year;
scanf("%d",&year);
if(year%4 ==0 || year%400 ==0 )
{
if(year%100 !=0)
printf("%d是闰年\n",year);
else
printf("%d是平年\n",year);
}
else
printf("%d是平年\n",year);
goto a;
}