PYTHON：输入今天之后的天数，显示未来的一天的日期

我想出了如何编码今天的日期，但我很难找到如何编码未来的日期，如果将来的日期大于整数6.在他们输入的今天的日期是0，所以它是星期天。但是自从星期天以来的几天，他们进入了31.结果是“今天是星期天，未来的一天是星期三”。我不明白这是如何编码的。这是我迄今为止所拥有的。PYTHON：输入今天之后的天数，显示未来的一天的日期

todaysDate = eval(input("Enter an interger for today's day of the week from 0 - 6, Sunday is 0 and Saturday is 6.")) 


if todaysDate == 0: 
    print("Today is Sunday") 
elif todaysDate == 1: 
    print("Today is Monday") 
elif todaysDate == 2: 
    print("Today is Tuesday") 
elif todaysDate == 3: 
    print("Today is Wednesday") 
elif todaysDate == 4: 
    print("Today is Thursday") 
elif todaysDate == 5: 
    print("Today is Friday") 
elif todaysDate == 6: 
    print("Today is Saturday") 



daysElapsed = eval(input("Enter the number of days elapsed since today:")) 

if daysElapsed == 1: 
    print("Today is Sunday and the future day is Monday")

来源

2016-09-16 DandyPotato

-2

这里(daysElapsed+todaysDate) % 7给你未来的日子里

def future(day): 
    if day == 0: 
     print("future is Sunday") 
    elif day == 1: 
     print("future is Monday") 
    elif day == 2: 
     print("future is Tuesday") 
    elif day == 3: 
     print("future is Wednesday") 
    elif day == 4: 
     print("future is Thursday") 
    elif day == 5: 
     print("future is Friday") 
    elif day == 6: 
     print("future is Saturday") 

todaysDate = int(input("Enter an interger for today's day of the week from 0 - 6, Sunday is 0 and Saturday is 6.")) 


if todaysDate == 0:  
    print("Today is Sunday") 
elif todaysDate == 1: 
    print("Today is Monday") 
elif todaysDate == 2: 
    print("Today is Tuesday") 
elif todaysDate == 3: 
    print("Today is Wednesday") 
elif todaysDate == 4: 
    print("Today is Thursday") 
elif todaysDate == 5: 
    print("Today is Friday") 
elif todaysDate == 6: 
    print("Today is Saturday") 


daysElapsed = int(input("Enter the number of days elapsed since today:")) 
future((daysElapsed+todaysDate) % 7)

来源

2016-09-16 05:51:05 trahane

使用模运算符，%，由7划分，并返回该操作的其余部分：

>>> 0 % 7 
0 
>>> 5 % 7 
5 
>>> 7 % 7 
0 
>>> 10 % 7 
3

此外，使用int()代替eval()投用户的输入为一个整数。这更安全。

您可以用list一起把这个保存的值，而不是一个大if块：

days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'] 

today = int(input("Enter an interger for today's day of the week from 0 - 6, Sunday is 0 and Saturday is 6.")) 
future = int(input("Enter the number of days elapsed since today:")) 
print('Today is {} and the future day is {}.'.format(days[today], 
                days[(today+future)%7]))

来源

2016-09-16 05:28:41 TigerhawkT3

嗨@ TigerhawkT3，我不太明白的模运算符，你能解释一下为什么5％7是5等的价值？谢谢 – DandyPotato

@DandyPotato - 如前所述，它执行一个普通的除法运算符，然后给你余数。五除以七是零，其余五。 – TigerhawkT3

除了Tigerhawk的回答（会发表评论，但没有足够的代表:(）

你

days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'] 

todaysDate = int(input("Enter an interger for today's day of the week from 0 - 6, Sunday is 0 and Saturday is 6.")) 
print "Today is {}".format(days[todaysDate]) 

daysElapsed = int(input("Enter the number of days elapsed since today:")) 
print "Today is Sunday and the future day is {}".format(days[daysElapsed % 7])

绝对不使用eval，BEC：可以通过存储的天列表，并访问它们的方式尽量减少代码repeition当每次有人把它写在SO上时，它就会被打烂;）哦，它的不安全或某事。

来源

2016-09-16 05:39:05 enjoi

PYTHON：输入今天之后的天数，显示未来的一天的日期

回答

相关问题