【C 语言】 这个代码错在哪了？我用的是Dev C++

Question

/*题目：输入某年某月某日，判断这一天是这一年的第几天？*/
#include
#define MONTH 12
struct date{
int Day;
int Month;
int Year;
};
int main()
{
int count,days,month;
struct date today;
int daysPerMonth[12]={31,28,31,30,31,30,31,31,30,31,30,31};

printf("请输入日期（如：2015.10.1）：");
scanf("%i.%i.%i", &today.Year, &today.Month, &today.Day);
printf("您输入的日期是：%i.%i.%i\n", today.Year, today.Month, today.Day);

while ( today.Month > MONTH || today.Day > daysPerMonth[today.Month + 1] 
|| today.Month < 1 || scanf("%i.%i.%i", &today.Year, &today.Month, &today.Day) != 3)      // 输入：2015.11.6.3 为什么会出错！ 
{
    printf("请输入正确的日期(如：2015.10.1)：");
    scanf("%i.%i.%i", &today.Year, &today.Month, &today.Day); 
}

if ((today.Year%4 == 0 && today.Year%100 != 0 ) || today.Year%400 == 0)
{
    daysPerMonth[1]=29;
}

for ( month=1; month <= today.Month; month++) 
{
    for ( days=1,count=1; days <= daysPerMonth[today.Month+1]; days++)
    {
        count ++;
    }
}
printf("今天是今年的第%d天", count);
return 0;

}

运行以后的界面：

本人刚学编程不久,希望各位可以解答详细点，拜托各位了！非常感谢！

问：
1.代码问题出在哪里了，怎么修改这个代码？

2.在输入2015.11.6.3（最后一位任意值都可）为什么会出错？怎样解决这个问题？

Answer 1

为什么多输入呢，必须对应的