哪错了呢 求解
#include <stdio.h>
int main()
{
/* 定义需要计算的日期 */
int year = 2008;
int month = 8;
int day = 8;
switch(month);
{
case 1:sum+=31;break;
case 2:sum+=28;break;
case 3:sum+=31;break;
case 4:sum+=30;break;
case 5:sum+=31;break;
case 6:sum+=30;break;
case 7:sum+=31;break;
case 8:sum+=31;break;
case 9:sum+=30;break;
case 10:sum+=31;break;
case 11:sum+=30;break;
case 12:sum+=31;break;
default:printf("一年当中只有12个月");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日是该年的第%d天。",year,month,day,sum);
return 0;
}