求指点哪错了？

#include <stdio.h>
int main()
{   int sum;
    int year = 2008;
    int month = 8;
    int day = 8;
    int month1 =31, month3=31, month4 =30,mouth5=31,mouth6=30,
        month7=31, month8=31, month9=30,month10=31, month11=30;
       
    if(year%4==0)
    {  int month2=29;}
    else
    { int month2=28;}
     int  moutha=month-1;
    switch(montha)
        {case 1:sum=month1;
        break;
         case 2:sum=month1+month2;
         break;
         case 3:sum=month1+month2+month3;
         break;
         case 4:sum=month1+month2+month3+month4;
         break;
         case 5:sum=month1+month2+month3+month4+month5;
         break;
         case 6:sum=month1+month2+month3+month4+month5+month6;
         break;
         case 7:sum=month1+month2+month3+month4+month5+month6
                     +month7;
         break;
         case 8:sum=month1+month2+month3+month4+month5+month6
                     +month7+month8;
         break;
         case 9:sum=month1+month2+month3+month4+month5+month6
                     +month7+month8+month9;
         break;
         case 10:sum=month1+month2+month3+month4+month5+month6
                     +month7+month8+month9+month10;
         break;            
         case 11:sum= month1+month2+month3+month4+month5+month6
                     +month7+month8+month9+month10+mounth11;
         break;
          default:
          break;
         }
         sum=sum+day;
         printf("d%年d%月d%日是该年的第d%天",year,mouth,day,sum);
         return 0;
       
       
    }