#include <stdio.h>
int main()
{
??? /* 定義需要計(jì)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("%s","一年只有十二個(gè)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日是這年的第%d天"，year,month,day,sum);
??? return 0;
}