Python 需要向年龄计算器添加月份的帮助吗

我正在为我的CS课程创建一个年龄计算器，我需要添加一个公式，在这里你可以用年和月来显示一个人的年龄

年公式很简单，只需现在做即可。然而，年-年-月要复杂得多，因为python会将两个月之间的距离计算为负值。例如，如果您输入的月份是2月，而不是说您离生日还有8个月，则表示您离生日还有-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，如果您输入的是2月而不是3个月，则程序将打印您离生日还有8个月

尝试使用模运算符：

agemonth = (month - now.month) % 12

---

当你出生在一月，现在是二月，减法得到-1，但12的余数是11，这就是我们想要的。

要处理负月份，你需要做两件事

在月数的基础上加上12，使其为正，或者取%12，这样-4变成8 每年减少1 您还可以简化后一个if语句 考虑到这两个变化，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")

---

考虑到您所说的某人的生日在2月，输出应该表明他们的生日还有8个月，正确的公式应该是：

    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

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：

你是哪一年出生的？一九九九年

你出生在哪个月？七,

年龄为19岁11个月

你已经足够大了，可以开车了

你还没到喝酒的年龄

---

如果用一个if来检查月份是否为负值，如果是，请修复它。你需要处理你的if条件，将负月份加12，将年份减1，检查我下面的答案@ergofye：

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")