这哪错了??
#include <stdio.h>
int main()
{
int year = 2008;
int month = 8;
int day = 8;
switch(month)
{
case 1:sum=0;break;
case 2:sum+=31;break;
case 3;if ((year%4==0&&year%100=0)||year/400==0) sum+=29;break;
else sum+=28;break;
case 4;sum+=31;break;
case 5;sum+=30;break;
case 6;sum+=31;break;
case 7;sum+=30;break;
case 8;sum+=31;break;
case 9;sum+=31;break;
case 10;sum+=30;break;
case 11;sum+=31;break;
case 12;sum+=30;break;
}
printf("2008年8月8日是该年的第%d天",sum);
return 0;
}