#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;
        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("一年当中只有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;
}