一、內容
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二、練習
練習1
題目：使用while循環輸出1 2 3 4 5 6 8 9 10
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方法一：
圖示：
代碼：
count = 1
while count < 11:if count != 7:print(count)count += 1
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1 2 3 4 5 6 8 9 10
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方法二：
圖示：
代碼：
count = 0
while count < 10:count += 1if count == 7:continueprint(count)
輸出結果：
1 2 3 4 5 6 8 9 10
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練習2
題目：求1-100的所有數的和
圖示：
代碼：
sum = 0
count = 1
while count < 101:sum = sum + countcount += 1
print(sum)
輸出結果：
5050
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練習3
題目：輸出 1-100 內的所有奇數
圖示：
代碼：
count = 1
while count < 101:if count % 2 != 0:print(count)count += 1
輸出結果：
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99
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練習4
題目：輸出 1-100 內的所有偶數
圖示：
代碼：
count = 1
while count < 101:if count % 2 == 0:print(count)count += 1
輸出結果：
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100
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練習5
題目：求1-2+3-4+5 ... 99的所有數的和
圖示：
代碼：
count = 1
sum1 = 0
sum2 = 0
while count < 100:if count % 2 != 0:sum1 = sum1 + countelse:sum2 = sum2 - countcount += 1
print(sum1 + sum2)
輸出結果：
50
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練習6
題目：用戶登陸（三次機會重試）
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步驟一：實現三次登陸的基本功能
圖示：
代碼：
user = 'knight'
pwd = 'dk123'
count = 1
while True:if count == 4:print('Too many times!')breakusername = input('Please enter your username:')password = input('Please enter your password:')if username == user and password == pwd:print('Login successfully!')breakelse:print('The username or password you entered is incorrect,Please try again!')count += 1
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步驟二：去除BUG并添加功能
1、去除用戶輸入用戶名時左右兩邊的空格
2、判斷用戶名是否有值，如果沒有則反復讓用戶輸入，并提示請輸入用戶名
3、判斷密碼是否有值，如果沒有則反復讓用戶輸入，提示請輸入密碼
4、用戶每輸錯一次便告之用戶還有多少次機會
圖示：
代碼：
user = 'knight'
pwd = 'dk123'
count = 1
while True:if count == 4:print('Too many times!')breakusername = input('Please enter your username:').strip()password = input('Please enter your password:')if not username:print('The username you entered is blank, please re-enter')continueelif not password:print('The password you entered is blank, please re-enter')continueif username == user and password == pwd:print('Login successfully!')breakelse:print('The username or password you entered is incorrect,Please try again!')print('You still have %s chances'%(3-count))count += 1
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步驟三：三次登陸鎖定
擴展：當同一個用戶名的輸錯次數超過三次時，鎖定該用戶名
圖示：
代碼：
user = 'knight'
pwd = 'dk123'
count = 1
times = [] # 用于統計密碼輸錯時的用戶名的個數with open('blacklist.txt', 'r', encoding='utf-8') as f_black:black_line = f_black.readlines() # 將黑名單內容以列表的形式讀出來# print(black_line)while True:# 當登陸次數超過3次時提示登陸次數過多，退出程序if count == 4:print('Too many times!')breakusername = input('Please enter your username:').strip()password = input('Please enter your password:').strip()# 判斷用戶名是否為空if not username:print('The username you entered is blank, please re-enter')continue# 判斷密碼是否為空elif not password:print('The password you entered is blank, please re-enter')continue# 判斷用戶名再加上"\n"是否在黑名單的列表里，如果在則提示用戶已鎖定再退出程序if username + '\n' in black_line:print('Sorry, your account has been locked!')break# 判斷用戶名和密碼是否匹配if username == user and password == pwd:print('Login successfully!')breakelse:print('The username or password you entered is incorrect,Please try again!')print('You still have %s chances' % (3 - count)) # 如果不匹配則提示用戶名或密碼錯誤并告之用戶還有幾次機會times.append(username) # 將錯誤的用戶名加入至事先定義的times列表中，if times.count(username) == 3: # 然后計算加入的用戶名的個數是否等于三個，如果是則寫入至黑名單文件中。with open('blacklist.txt', 'a', encoding='utf-8')as f:f.write(username+'\n')count += 1?
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練習7
題目：猜年齡
步驟一：實現基本邏輯
圖示：
代碼：
age = 28
while True:user = int(input('Please enter a number:')) # 強轉為整型if user > age:print('Try smaller!')elif user < age:print('Try bigger!')else:print('You got it!')break
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步驟二：去除BUG并添加功能
1、去除BUG，當用戶輸入其它字符時讓其重新輸入
2、添加猜錯時給予三次機會功能
圖示：
代碼：
age = 28
count = 0
while True:if count == 3:print('You guess too many times')breakuser = input('Please enter a number:').strip()if not user.isdigit():print('Please try again,and you must enter a number!')continueelse:user = int(user)if user > age:print('Try smaller!')elif user < age:print('Try bigger!')else:print('You got it!')breakcount += 1
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三、英語單詞
必? 須? 背? 誦? 出? 來? ！
1、Programming
['proɡr?m??]? ? n.?編程
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2、Programming??language
['proɡr?m??]???['l??ɡw?d?]? ?n.編程語言
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3、high-level language
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[,ha?'l?vl]??['l??ɡw?d?]? ?n.高級語言
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4、machine?language
[m?'?in]??['l??ɡw?d?]? ?n.機器語言
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5、assembly language
?[?'s?mbli]?['l??ɡw?d?]? ?n.匯編語言
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6、variable
?['v?r??bl]? ?n.?變量?
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7、memory
['m?m?ri]? ?n.內存
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8、binary
['ba?n?ri]? ?n.二進制
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9、decimalism
['desim?liz?m]? ? n.十進制
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10、octal?
['ɑktl]? ? adj.八進制的
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11、hexadecimal
[,h?ks?'d?s?ml]? ? n.十六進制
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12、file
?[fa?l]? ? n.文件
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13、directory
[d??r?kt?ri; (also) da??r?kt?ri]? ?n.目錄
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14、input
?['?n'p?t]? ? vt.輸入
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 。_學小易找答案...)
