卑微小白在线求纠错

include <stdio.h>
int main()
{
    int year = 2008;
    int month = 8;
    int day= 8;
    int num=0;
    switch(month)
{   case 1:num+=0;
    case 2:num+=31;
    case 3:num+=28;
    case 4:num+=31;
    case 5:num+=30;
    case 6:num+=31;
    case 7:num+=30;
    case 8:num+=31;
    case 9:num+=31;
    case 10:num+=30;
    case 11:num+=31;
    case 12:num+=30;
    break;
}
    num=num+day;
    if(year%4==0&&year%100!=0||year%400==0)
{   if(month>2)
    {num++; printf("%d年%d月%d日这一天,是该年的第%d天",year,month,day,num);}
    else
    printf("%d年%d月%d日这一天,是该年的第%d天",year,month,day,num);
}
    else
    printf("%d年%d月%d日这一天,是该年的第%d天",year,month,day,num);
return 0;
   
}