大约在第7行

Posted 2023-02-14

from datetime import date
name = input("what's your name?")
surname = input("what's your surname?")
birth_year = input("what's your birth year?")
initials = name[0] + surname[0]
current = date.today()
age = current.year - birth_year
print('your initials are ' + initials.upper() + ' and you are ' + str(age) + ' years old')

答案

您正在将int减去一个字符串。

python中的输入始终是字符串。因此，当您询问用户birth_year时，用户键入的数字将作为字符串进行评估。

因此age = current.year - birth_year实际上是：int - string。

为避免这样做：

age = current.year - int(birth_year)

另一答案

请执行以下提到的更改，代码将正常工作。行号4已更改为接受int格式而不是字符串格式（这是输入的默认格式）的输入年份]

`from datetime import date
name = input("what's your name?")
surname = input("what's your surname?")
birth_year = int(input("what's your birth year?"))
initials = name[0] + surname[0]
current = date.today()
age = current.year - int(birth_year)
print('your initials are ' + initials.upper() + ' and you are ' + str(age) + ' years 
old')`