自学python的日记分享

Myth丶恋晨 2021-12-03 22:19 313阅读 0赞

**2019.4.22登记**

***课堂笔记 2019.4.8***

在windows环境下，用python写出第一个程序“hello world”

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1 print("Hello World!!!")

***课堂笔记 2019.4.12***

在windows环境下，用python写出第一个用户交互程序“input”

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1 death_age=120
     2 
     3 print("game star")
     4 print("")
     5 print("")
     6 
     7 name=input("input your name:")
     8 age=input("input your age:")
     9 
    10 
    11 print(name,"still able to live",death_age-int(age),"years")

***课堂笔记2019.4.13***

python程序<数字比大小>： 用户输入3个数字，输出最大的数字和最小的数字

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1 #My idea
     2 
     3 '''
     4 No1=int(input("please input first number:"))
     5 No2=int(input("please input scend number:"))
     6 No3=int(input("please input third number:"))
     7 
     8 if No1>No2>No3:
     9     print("Max No is No1:",No1,"Min No is No3:",No3)
    10 elif No1>No3>No2:
    11     print("Max No is No1:",No1,"Min No is No2:",No2)
    12 elif No2>No1>No3:
    13     print("Max No is No2:",No2,"Min No is No3:",No3)
    14 elif No2>No3>No1:
    15     print("Max No is No2:",No2,"Min No is No1:",No1)
    16 elif No3>No1>No2:
    17     print("Max No is No3:",No3,"Min No is No2:",No2)
    18 elif No3>No2>No1:
    19     print("Max No is No3:",No3,"Min No is No1:",No1)
    20 '''
    21 
    22 
    23 #teather's idea. only MaxNo,no MinNo
    24 
    25 '''
    26 No1=int(input("please input first number:"))
    27 No2=int(input("please input scend number:"))
    28 No3=int(input("please input third number:"))
    29 
    30 No=0
    31 
    32 if No1>No2:
    33     No=No1
    34     if No>No3:
    35         print("Max No is:",No)
    36     else:
    37         print("Max No is:",No3)
    38 else:
    39     No=No2
    40     if No>No3:
    41         print("Max No is:",No)
    42     else:
    43         print("Max No is:",No3)
    44 '''
    45 
    46 #bettet idea
    47 
    48 No1=int(input("please input first number:"))
    49 No2=int(input("please input scend number:"))
    50 No3=int(input("please input third number:"))
    51 
    52 max_No=0
    53 min_No=0
    54 
    55 if No1>No2:
    56     max_No=No1
    57     if max_No<No3:
    58         min_No=No2
    59         print("Max No is:",No3,"Min No is:",min_No)
    60     else:
    61         if No2<No3:
    62             min_No=No2
    63             print("Max No is:",max_No,"Min No is:",min_No)
    64         else:
    65             min_No=No3
    66             print("Max No is:",max_No,"Min No is:",min_No)
    67 else:
    68     max_No=No2
    69     if max_No<No3:
    70         min_No=No1
    71         print("Max No is:",No3,"Min No is:",min_No)
    72     else:
    73         if No1<No3:
    74             min_No=No1
    75             print("Max No is:",max_No,"Min No is:",min_No)
    76         else:
    77             min_No=No3
    78             print("Max No is:",max_No,"Min No is:",min_No)

***课堂笔记2019.4.14***

python的四种运算符：算数运算符，赋值运算符，比较运算符，逻辑运算符。

算数运算符：+，-，\*，/，//，%，\*\*

赋值运算符：word="hello"（赋值字符串） ， word=23（赋值数字）

比较运算符：<,>,==,!=

逻辑运算符：not , and , or （and和or有短路原则，如果条件1结果已知，后续代码不再执行）

***课堂笔记2019.4.15***

while语句：打印1-10

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1 #打印1=10
    2 No = 1
    3  
    4 while No<=10:
    5      print(No)
    6      No+=1

***课堂笔记2019.4.16***

1.编写一个猜测年龄的程序

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1 #猜年轻
     2 
     3 ''' 用if语句判断
     4 goal_age=76
     5 
     6 guess_age=int(input("please guess age(1-100):"))
     7 
     8 # print(guess_age,goal_age)
     9 
    10 if(guess_age==goal_age):
    11  print("you got it")
    12 else:
    13  print("sorry,you are wrong")
    14 '''
    15 
    16 #利用while实现一直输入
    17 '''
    18 暂时无法实现2个问题：
    19 1.从输错了数字开始算起的区间（比如输入两个数字（34，89）后，无法提醒在（34-89）之间的数字猜测）
    20     2019.4.22号已自行解决
    21 2.由用户自己选择放弃猜测退出程序. 2019.5.6 已解决
    22 
    23 '''
    24 goal_age = 76
    25 
    26 guess_age = int(input("please guess age(1-100):"))
    27 guess_maxage = 100
    28 guess_minage = 1
    29 
    30 while guess_age != goal_age:
    31 
    32     if guess_age < goal_age:  # 判断输入的数字是否正确
    33         print()
    34         if guess_age > guess_minage:  # 用来取输入后的最小值
    35             guess_minage = guess_age
    36         print("your input number is:", guess_age)
    37         print("that's too small... please guess ", guess_minage, "- ", guess_maxage, "!!")
    38     elif guess_age > goal_age:
    39         print()
    40         if guess_age < guess_maxage:  # 用来取输入后的最大值
    41             guess_maxage = guess_age
    42         print("your input number is:", guess_age)
    43         print("that's too big... please guess ", guess_minage, " -", guess_maxage, "!!")
    44 
    45     guess_age = input("you can input 'give up' go to out or guess again:")
    46 
    47         if guess_age == "give up":
    48         print("It's so pity!!!")
    49         break
    50 
    51     guess_age = int(guess_age)
    52 
    53 else:
    54     print("you got it")

2.输出1-100之间的偶数

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1 #输入1-100之间的偶数
    2 
    3 No=1
    4 
    5 while No<=100:
    6     if No%2==0:
    7         print(No)
    8     No+=1

3.语法1：break 用来跳出本循环，continue用来结束本次循环。

语法2：print(“abc”,end=“”) “abc”后面不换行，继续显示打印的内容。

语法3：while ... else... 非break中止的程序，都会执行else后的程序 。

***课堂笔记2019.4.19***

编写九九乘法表

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1 '''
     2 个人思路：
     3 九九乘法表。 a=1  while a <= 9: b=1  while b<=a:print((b,”*”,a,b*a),end(“,”))   b+=1  a+=1
     4 '''
     5 
     6 high =1
     7 
     8 while high<=9:
     9     wieth=1
    10     while wieth<=high:
    11         print(wieth,"*",high,"=",wieth*high,end="\t") # '\n'是换行，'\t'是tab
    12         wieth+=1
    13     print()
    14     high+=1

转载于:https://www.cnblogs.com/kentee/p/10751147.html

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