菜鸟教程练习实例4 （python3）

骑猪看日落 2022-05-23 01:48 47阅读 0赞

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：

# -*- coding:utf-8 -*-
    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 += day
    leap = 0
    if (year % 400 == 0) or ((year % 4 == 0) and (year % 100 != 0)):
        leap = 1
    if (leap == 1) and (month > 2):
        sum += 1
    print('it is the %dth day.' % sum)

# -*- coding:utf-8 -*-
    
    
    def main():
        year = int(input('year:\n'))
        month = int(input('month:\n'))
        day = int(input('day:\n'))
        months_leap = [0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]  # 闰年
        months_flat = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]  # 平年
        days = 0
        if year % 100 == 0:
            if year % 400 == 0:  # 闰年
                for i in range(0, month):
                    days += months_leap[i]
                days += day
            else:  # 平年
                for i in range(0, month):
                    days += months_flat[i]
                days += day
        elif year % 4 == 0:  # 闰年
            for i in range(0, month):
                days += months_leap[i]
            days += day
        else:  # 平年
            for i in range(0, month):
                days += months_flat[i]
            days += day
        print('It is the %dth days.' % days)
    
    
    main()