1+ # 冒泡排序
2+ def bubble_s (data ):
3+ length = len (data )
4+ # 第二层循环:循环一次,表示相邻两个元素进行了一次比较
5+ for i in range (length ):
6+ for j in range (1 , length - i ):
7+ if data [j - 1 ] > data [j ]:
8+ # 相邻元素进行替换
9+ data [j ], data [j - 1 ] = data [j - 1 ], data [j ]
10+ print (data )
11+ 12+ # 选择排序
13+ def select_s (data ):
14+ # 第一层循环:取出数组中的所有元素
15+ for i in range (len (data )):
16+ temp = i # 取出第一个元素用来比较
17+ # 第二层循环:从第i后面的一个值开始循环,与data[i]进行比较
18+ for j in range (i + 1 ,len (data )):
19+ if data [j ] < data [temp ]:
20+ data [temp ], data [j ] = data [j ], data [temp ]
21+ print (data )
22+ 23+ 24+ 25+ # 插入排序
26+ # 将第一个元素作为有序区的元素,从无序区取出一个元素与有序区元素进行逐个比较,并加入到有序区,依次循环
27+ 28+ def insert_s (data ):
29+ # 第一层循环: 从第二个元素开始循环取出元素,取出的元素再与有序区元素进行比较
30+ for i in range (1 ,len (data )):
31+ temp = data [i ]
32+ j = i - 1
33+ while j >= 0 and temp < data [j ]:
34+ data [j + 1 ] = data [j ]
35+ j = j - 1 # 在与前面一个元素进行比较,所以j 需要减1
36+ # 当j = -1 就跳出循环,将temp值赋给第一个值,即data[0]
37+ data [j + 1 ] = temp
38+ print (data )
39+ 40+ 41+ 42+ # 快速排序
43+ def partition (data , left , right ):
44+ temp = data [left ]
45+ while left < right :
46+ # 如果最右边的值大于中间值,则最右边值往后退一个位置,反之,就将值赋值给最左边位置
47+ while left < right and data [right ] >= temp :
48+ right = right - 1
49+ data [left ] = data [right ]
50+ # 如果最左边的值小于中间值,则最左边值往前进一个位置,反之,就将值赋值给最右边位置
51+ while left < right and data [left ] <= temp :
52+ left = left + 1
53+ data [right ] = data [left ]
54+ # 循环结束,即可定位到中间位置,将初始值,赋值到这个位置
55+ data [left ] = temp
56+ return left
57+ 58+ 59+ def quick_sort (data , left , right ):
60+ if left < right :
61+ mid = partition (data , left , right )
62+ quick_sort (data , left , mid )
63+ quick_sort (data , mid + 1 , right )
64+ 65+ 66+ 67+ 68+ # 计数排序
69+ def count_sort (data ):
70+ count = [0 for _ in range (len (data )+ 1 )]
71+ for i in data :
72+ count [i ] += 1
73+ data .clear ()
74+ for index , nums in enumerate (count ):
75+ for j in range (nums ):
76+ data .append (index )
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