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:
#!/usr/bin/python
# -*- coding: UTF-8 -*-
year=int(input("年: "))
month=int(input("月: "))
day=int(input("日: "))
months1=[0,31,60,91,121,152,182,213,244,274,305,335,366] #闰年
months2=[0,31,59,90,120,151,181,212,243,273,304,334,365] #平年
if ((year%4==0)and(year%100!=0)) or((year%100==0)and(year%400==0)):
Dth=months1[month-1]+day
else:
Dth=months2[month-1]+day
print("是该年的第%d天"%Dth)
第二种方式:
# 输入任意年月日,知道是改年第几天
p = [31,28,31,30,31,30,31,31,30,31,30,31] # 平年
w = [31,29,31,30,31,30,31,31,30,31,30,31] # 闰年
year =int(input("请输入年:"+' '))
month =int(input("请输入月:"+' '))
day=int(input("请输入日:"+' '))
arr=[31,28,31,30,31,30,31,31,30,31,30,31]
sum=day
for i in range(0,month-1):
sum+=arr[i]
if year%4==0:
if year%100==0 and year%400!=0:
print("这是今年的第%d天" % sum)
else:
sum=sum+1
print("这是今年的第%d天" % sum)
else:
print("这是今年的第%d天" % sum)