输入某年某月某日，判断这一天是这一年的第几天？1.程序分析：以3月5日为例，应该先把前两个月的加起来，然后再加上5天即本年的第几天，特殊　　　　　　情况，闰年且输入月份大于3时需考虑多加一天。-Enter a certain period of a day, this day is to determine the first few days this year? 1 program analysis: the March 5, for example, should add up to two months before the first, and then combined with five days this year- the first few days, special circumstances, a leap year and the input required is greater than 3 months considered more a day.