Small test (I)

Catalog

The main points of this issue ：

The content of this issue ：   

The first question is ：

The second question is ： 

Third question ： 

  Summary ：

---

The main points of this issue ：

      We have learned a lot in previous issues , In this issue, let's examine , Here I have prepared three small questions , As long as you look carefully in front, you can make it , Try the current screen ！！！

The content of this issue ：   

The first question is ：

        subject ： It's today 2022 year 7 month 25 Japan , Then we write it as a time integer, which is ：2022725, Here we need to calculate its year separately 、 month 、 Japan

        Ideas ： stress the essentials ：2022725        Using calculation , So what is calculation ？ That's addition 、 Subtraction 、 Multiplication 、 division 、 to be divisible by 、 Take several of them to write this question

        I believe you must have your own answer , Then let's solve it ：

  Source code ：

Date = 2022725
Year = Date // 1000     #  Get by divising 2022
Month = Date // 100 %10 #  Get by dividing and remainder 7
Day = Date % 100        #  Get... By taking the remainder 25
#  Print the results ：
print(Year)
print(Month)
print(Day)

Print the results ：

The second question is ： 

         subject ： take Hello、Python These two words are spliced together .

        Ideas ：  Still focus on key points ：“ word ” It is determined that this is a string type         “ Splicing ” That is, put them together         therefore ： The test point of this question is the splicing of strings .

         I believe you must have your own answer , Then let's solve it ：

Source code ：

str1 = 'Hello'  #  First assign the first value 
str2 = 'Python' #  Assign the second value 

#  The first one is ：
#  String formatting splicing 
print('%s %s' % (str1,str2))

#  The second kind ：
# join Method splicing 
print(' '.join([str1,str2]))

#  The third kind of ：
# format Method splicing 
print('{} {}'.format(str1,str2))

#  A fourth ：
# format Abbreviation splicing 
print(f'{str1} {str2}')

Print the results ：

Third question ： 

        subject ： Let the user provide the radius , Then calculate the circumference and area of the corresponding circle ( Keep two decimal places at the end )

        Ideas ： Focus on the key points ： The user provides , Use our input Built in functions           And it needs the help of mathematical modules to obtain the PI         Understand the formula of circle circumference and area         Keep two decimal places , You can use string formatting and high-precision modules

         I believe you must have your own answer , Then let's solve it ：

Source code ：

#  Import math module 
import math
#  Import high-precision modules 
import decimal

#  Let the user provide the radius of the circle 
r = int(input(" Please enter the radius of the circle ："))
#  Get the pi 
pi = math.pi

#  The perimeter formula （ High precision ）
C = decimal.Decimal(r) * decimal.Decimal(2) * decimal.Decimal(pi)
#  Area formula （ High precision ）
S = decimal.Decimal(r) ** decimal.Decimal(2) * decimal.Decimal(pi)

#  Print the perimeter with two decimal places 
print('%.2f' % C)
#  Print the area with two decimal places 
print('%.2f' % S)

Print the results （ Take the radius as 5 To test ）：

  Summary ：

        In this issue, we practiced three small problems , I hope I can help you ！！！