#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;
? ?switch(month)
? ?{
? ? ? ?case 1:sum=0;break;
? ? ? ?case 2:sum=31;break;
? ? ? ?case 3:sum=31+28;break;
? ? ? ?case 4:sum=31+28+31;break;
? ? ? ?case 5:sum=31+28+31+30;break;
? ? ? ?case 6:sum=31+28+31+30+31;break;
? ? ? ?case 7:sum=31+28+31+30+31+30;break;
? ? ? ?case 8:sum=31+28+31+30+31+30+31;break;
? ? ? ?case 9:sum=31+28+31+30+31+30+31+30;break;
? ? ? ?case 10:sum=31+28+31+30+31+30+31+30+31;break;
? ? ? ?case 11:sum=31+28+31+30+31+30+31+30+31+30;break;
? ? ? ?case 12:sum=31+28+31+30+31+30+31+30+31+30+31;break;
? ?}
? ?//計算天數
? ?sum=sum+day;
? ?if(year%400==0&&month>2)
? ?sum+=1;
? ?else
? ?sum=sum;
? ?printf("%d年%d月%d日是該年的第%d天",year,month,day,sum);
return 0;
}