各位大佬请问哪里错了？找不出来

#include <stdio.h>
int main()
{ 
    int year = 2008;
    int month = 8;
    int day = 8;
     int sum=0;
     if(year%4==0)
    {
        for(int month=1;month<=7;month++)
        {
        switch(month)
        case 1:sum+=31;
        break;
        case 2:sum+=29;
        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;
        }
    }
    else(year%4!=0)
    {
        for(int month=1;month<=7;month++)
        {
        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;
        }
    }
   
    sum+=day;
    printf("2008年8月8日是该年的第%d天",sum);
 return 0;
}