Question

我正在为我的CS课创建一个年龄计算器，我需要添加一个公式，在其中显示某人的年龄和月份。

仅通过now.year -year来计算year公式很简单，但是month则要复杂得多，因为python会将两个月之间的距离计算为负数。例如，如果您输入的月份是2月，而不是说您距生日8个月，则表示您距生日-3个月。

import datetime
now = datetime.datetime.now()
print ("Current year:", now.year)
print ("Current month:", now. month)

year = int(input("What year were you born in? "))
month = int(input("What month were you born in? "))
agemonth = month - now.month
age = now.year - year
print("Your age is", age)

if age >= 16:
    print("You are old enough to drive")
else:
    print("You are not old enough to drive")

if age >= 21:
    print("You are old enough to drink")
else:
    print("You are not old enough to drink")

理想情况下，如果您输入2月，程序会打印出您距离生日8个月，而不是距生日3个月

Answer 1

尝试使用模运算符：

agemonth = (month - now.month) % 12

在一月和二月出生的时候，减法为-1，但是12的余数就是11，这就是我们想要的。

Answer 2

要照顾负面的几个月，您需要做两件事

在月份数中加12以使其为正数，或采用%12，因此-4变为8
减少1年您还可以简化后面的if语句

考虑到这两个更改，代码变为

import datetime
now = datetime.datetime.now()
print ("Current year:", now.year)
print ("Current month:", now. month)

year = int(input("What year were you born in? "))
month = int(input("What month were you born in? "))
agemonth = now.month - month
age = now.year - year

#If months are negative
if agemonth < 0:
    #Take modulo 12 of agemonth to make it positive
    agemonth = agemonth%12
    #Subtract 1 from year
    age = age - 1

print("Your age is ", age, "years and", agemonth, 'months')

#3 If statements based on ages
if age <= 16:
    print("You are not old enough to drive")
    print("You are not old enough to drink")
elif 16 < age < 21:
    print("You are old enough to drive")
    print("You are not old enough to drink")
else:
    print("You are old enough to drive")
    print("You are old enough to drink")

可能的输出是

Current year: 2019
Current month: 5
What year were you born in? 1991
What month were you born in? 1
Your age is  28 years and 4 months
You are old enough to drive
You are old enough to drink

Current year: 2019
Current month: 5
What year were you born in? 2005
What month were you born in? 8
Your age is  13 years and 9 months
You are not old enough to drive
You are not old enough to drink

Current year: 2019
Current month: 5
What year were you born in? 2001
What month were you born in? 1
Your age is  18 years and 4 months
You are old enough to drive
You are not old enough to drink

Answer 3

考虑到您所说的某人在2月有生日的事实，输出应表明他们的生日在8个月后，正确的公式应为：

    agemonth = (month-now.month-1)%12 
    #month = 2, now.month = 5. Thus agemonth = 8

这将始终为您提供所需的输出。

Answer 4

from datetime import date

year = int(input("What year were you born in? "))
month = int(input("What month were you born in? "))

today = date.today()
age = today.year - year
agemonth = today.month - month
totmonth = 0
if  agemonth >= 0:
  totmonth = agemonth 
else:
  agemonth = 12 + agemonth 
  age -= 1

print "age is" , age,"years and", agemonth,"months"
if age <= 16:
  print("You are not old enough to drive")
  print("You are not old enough to drink")
elif 16 < age < 21:
  print("You are old enough to drive")

输出：

您出生于哪一年？ 1999

您出生在哪个月份？ 7

年龄是19岁11个月

您已经可以开车

你还没有喝酒的年龄

需要帮助将年龄计算器增加数月

4 个答案: