Python 练习实例4

题目：输入某年某月某日，判断这一天是这一年的第几天？

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2时需考虑多加一天：

程序源代码：

实例

#!/usr/bin/python3 year = int(input('year:\n'))month = int(input('month:\n'))day = int(input('day:\n')) months = (0,31,59,90,120,151,181,212,243,273,304,334)if 0 < month <= 12:     sum = months[month - 1]else:     print ('data error')sum += dayleap = 0if (year % 400 == 0) or ((year % 4 == 0) and (year % 100 != 0)):     leap = 1if (leap == 1) and (month > 2):     sum += 1print ('it is the %dth day.' % sum)

以上实例输出结果为：

year:

2015

month:

6

day:

7

it is the 158th day.