标准答案，经VS++6.0测试

#include <stdio.h>
int man()
{
    int year=2008;
    int month=8;
    int day=8;
    switch(month-1) /*8月本身不能算在其中，所以要减一，在switch中如果想算一共多少天就不能使用break跳出。*/
    {
        case 11:day +=30;
        case 10:day +=31;
        case 9 :day +=30;
        case 8 :day +=31;
        case 7 :day +=30;
        case 6 :day +=31;
        case 5 :day +=30;
        case 4 :day +=31;
        case 3 :day +=30;
        case 2 :
            if((year%100!=0 && year%4==0) || year%400==0)
             {
                day +=29;
             }
            else
             {
                day +=28;
             }
        case 1:day +=31;
        break;
    }
    printf("是该年第几天",day);
   
       
    }