#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(dāng)中只有12個月");break;
??? }
??? sum = sum + day;
??? if(year%4 || year%100 && year%400==0)
??????? flag =1;
??? else
??????? flag =0;
??? if(flag==1&&month>2)
?????? sum++;
??? printf("%d年%d月%d日這一天是該年中的第%d天",year,month,day,sum);
?return 0;
}