#include "stdio.h"
void 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",year);
printf("a leap year.\n");
printf("ID:2013914119");
}
总结:闰年的判断条件有多个,要考虑清楚,不要遗漏。