#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;
????????default:printf("一年當中只有12個月哦~");break;
????}
????sum=sum+day
????if(year%400==0||(year%4==0?&&?year%100!=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;
}