输入某年某月某日，判断这一天是这一年的第几天？
减小字体
增大字体以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：
#!/usr/bin/python
# -*- coding:
UTF-8 -*-year = int(raw_input('year:
\n'))month = int(raw_input('month:
\n'))day = int(raw_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
程序源代码：
实例(Python 2.0+)
#!/usr/bin/python
# -*- coding:
UTF-8 -*-year = int(raw_input('year:
\n'))month = int(raw_input('month:
\n'))day = int(raw_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:
2015month:
6day:
7it is the 158th day.
输入某年某月某日，判断这一天是这一年的第几天？
