请教 哪里错了
#include <stdio.h>
int main()
{
/* 定义需要计算的日期 */
int year = 2008;
int month = 8;
int day = 8;
int i =1;
int num=0;
if( ; i<month; i++)
{
switch(i)
{
case 1 :
num= num +31;
break;
case 2:
nun = num +29;
break;
case 3:
num=num+31 ;
break;
case 4 :
num = num +30;
break;
case 5:
num = num+31;
break;
case 6 :
num = num+30;
break;
case 7 :
num = num +31 ;
break;
}
num = num ;
}
else
{
printf("%dnum="num+day);
}
return 0;
}