不知道哪里出错了，求解

#include <stdio.h>
int main()
{
    /* 定义需要计算的日期 */
    int year = 2008;
    int month = 7;
    int day = 8;
    int total=0;
    switch(month)
    {
        case 1:total+=31;
        case 2:
        if(year%4==0&&year%100==0&&year%400!=0)
        {total+=29;}
        else{
        total+=28;
        }
        case 3:total+=31;
        case 4:total+=30;
        case 5:total+=31;
        case 6:total+=30;
        case 7:total+=31;
        case 8:total+=31;
        case 9:total+=30;
        case 10:total+=31;
        case 11:total+=30;
        case 12:total+=31;
    }
     total=total+day+1;
     printf("%d年%d月%d日是该年的%d天"，year,month,day,total);
 
 return 0;
}

请问哪里出了问题