#include?<stdio.h>
int?main()
{
????/*?定義需要計算的日期?*/
????int?year?=?2008;
????int?month?=?8;
????int?day?=?8;
????int?sum,?flag;
????switch?(month)
????{
????case?1:?sum?=?0;break;
????case?2:?sum?=?31;break;
????case?3:?sum?=?59;break;
????case?4:?sum?=?90;break;
????case?5:?sum?=?120;break;
????case?6:?sum?=?151;break;
????case?7:?sum?=?181;break;
????case?8:?sum?=?212;break;
????case?9:?sum?=?243;break;
????case?10:?sum?=?273;break;
????case?11:?sum?=?304;break;
????case?12:?sum?=?334;break;
????}
????sum?=?sum?+?day;
????if?(year?%?400?==?0)
????????flag?=?1;
????else
????????flag?=?0;
????if?(flag?==?1?&&?month?>?2)
????????sum++;
????printf("%d年%d月%d日是該年的第%d天",?year,?month,?day,?sum);
????return?0;
}
2021-08-19
閏年條件表達式那里有問題，建議改成：(year%400==0||(year%4==0&&year%100!=0))
2021-08-25
閏年的條件是：
①能被4整除且不能被100整除；
②能被400整除；
2021-08-21
閏年是4的倍數且不是100的倍數，可以改成(year / 4 == 0|| year % 100 != 0)