#include?<stdio.h>
int?main()?{
????/*?定義需要計算的日期?*/
????int?year?=?2008;
????int?month?=?8;
????int?day?=?8;
????int?allDay?=?0;
????int?i;
????int?monthDay;
????for?(i=1;?i<month;?i++)?{
????????switch(i)?{
????????????case?1:
????????????????monthDay?=?31;
????????????????break;
????????????case?2:
????????????????if?(year%400?==?0?||?(year%4?==?0?&&?year%100?!=?0))?{
????????????????????//?為閏年
????????????????????monthDay?=?28;
????????????????}?else?{
????????????????????monthDay?=?29;
????????????????}
????????????????break;
????????????case?3:
????????????????monthDay?=?31;
????????????????break;
????????????case?4:
????????????????monthDay?=?30;
????????????????break;
????????????case?5:
????????????????monthDay?=?31;
????????????????break;
????????????case?6:
????????????????monthDay?=?30;
????????????????break;
????????????case?7:
????????????????monthDay?=?31;
????????????????break;
????????????case?8:
????????????????monthDay?=?31;
????????????????break;
????????????case?9:
????????????????monthDay?=?30;
????????????????break;
????????????case?10:
????????????????monthDay?=?31;
????????????????break;
????????????case?11:
????????????????monthDay?=?30;
????????????????break;
????????????case?12:
????????????????monthDay?=?31;
????????????????break;
????????}
????????allDay?+=?monthDay;
????}
????allDay?+=?day;
????printf("%d年%d月%d日是該年的第%d天",?year,?month,?day,?allDay);
????return?0;
}