#include <stdio.h>
int main()
{
    /* 定义需要计算的日期 */
    int year = 2008;
    int month = 8;
    int day = 8;
     int sum,flag;
     switch(month)
     {
         case 1:sum=0;
         case 2:sum=31;
         case 3:sum=59;
         case 4:sum=90;
         case 5:sum=120;
         case 6:sum=151;
         case 7:sum=181;
         case 8:sum=212;
         case 9:sum=243;
         case 10:sum=273;
         case 11:sum=304;
         case 12:sum=334;
         default:printf("一年只有12个月哦");
         break;
     }
    sum=sum+day;
    if(year%4==0&&year%100!=0||year%400==0)
        flag=1;
    else
        flag=0;
    if( flag=1&&month>=2    )
    sum++;
      printf("%d年%d月%d日是该年的第%d天",year,month,day,sum);
      return 0;      }
       
   
   
   
   

 return 0;
}