冒泡排序:
from random import randint
def show_data(data):
for i in data:
print(i, end=',')
def bubble_sort(data):
"""冒泡排序"""
"""每轮都将较大的数移动到后面"""
print("排序前:")
show_data(data)
n = len(data)
for i in range(n-1):
flag = 0
for j in range(n-1-i):
if data[j] > data[j+1]:
data[j], data[j+1] = data[j+1], data[j]
flag = 1
if flag == 0:
break
print("\n排序后:")
show_data(data)
data = [randint(0,100) for _ in range(30)]
bubble_sort(data)
排序前:
41,55,0,80,44,99,76,26,37,38,6,9,99,43,1,49,65,15,72,21,100,45,65,84,97,24,95,61,39,48,
排序后:
0,1,6,9,15,21,24,26,37,38,39,41,43,44,45,48,49,55,61,65,65,72,76,80,84,95,97,99,99,100,
选择排序:
from random import randint
def show_data(data):
for i in data:
print(i, end=',')
def select_sort(data):
"""选择排序"""
print("排序前:")
show_data(data)
n = len(data)
for i in range(n-1):
minIndex = i
for j in range(i+1,n):
if data[j] < data[minIndex]:
minIndex = j
data[i], data[minIndex] = data[minIndex], data[i]
print("\n排序后:")
show_data(data)
>>data = [randint(0,100) for _ in range(30)]
>>select_sort(data)
排序前:
34,0,85,60,18,68,45,58,70,6,12,42,28,52,15,81,74,7,57,76,62,19,39,36,83,82,90,13,9,82,
排序后:
0,6,7,9,12,13,15,18,19,28,34,36,39,42,45,52,57,58,60,62,68,70,74,76,81,82,82,83,85,90,
插入排序:
import random
def show_data(data):
for i in data:
print(i, end=',')
def insert_sort(data):
"""插入排序"""
print("排序前:")
show_data(data)
for i in range(1, len(data)):
temp = data[i]
front = i - 1
while front >=0 and data[front] > temp:
data[front+1] = data[front]
front -= 1
data[front+1] = temp
print("\n排序后:")
show_data(data)
>>data = [i for i in range(100)]
>>random.shuffle(data)
>>insert_sort(data)
排序前:
87,73,66,69,68,36,25,17,74,92,23,89,77,41,38,45,1,51,6,13,79,33,24,46,90,63,29,27,37,95,58,96,34,4,62,20,19,55,97,93,26,32,22,61,50,78,83,28,80,8,15,56,75,84,12,2,67,9,59,43,88,72,31,85,71,35,76,10,99,86,48,82,42,98,81,30,14,16,52,39,7,65,47,60,21,91,64,3,53,11,5,44,57,70,40,18,0,94,54,49,
排序后:
0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,
希尔排序:
import random
def show_data(data):
for i in data:
print(i, end=',')
def shell_sort(data,step=2):
"""插入排序"""
print("排序前:")
show_data(data)
gap = len(data) // step
while gap != 0:
################insert_sort######################
for i in range(1, len(data)):
temp = data[i]
front = i - gap
while front >=0 and data[front] > temp:
data[front+gap] = data[front]
front -= gap
data[front+gap] = temp
##################################################
gap //= step
print("\n排序后:")
show_data(data)
>>data = [i for i in range(100)]
>>random.shuffle(data)
>>shell_sort(data)
排序前:
82,75,49,39,8,80,87,47,33,38,91,13,78,84,89,85,52,41,71,79,19,55,94,98,42,32,26,57,23,14,29,67,21,4,10,56,96,27,44,81,0,90,99,68,64,70,40,86,63,9,7,46,74,72,77,48,35,58,88,92,31,18,3,20,59,36,95,28,2,34,5,45,93,53,54,17,65,12,30,50,24,62,69,66,76,25,22,15,60,11,16,6,37,83,61,43,73,51,1,97,
排序后:
0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,
堆排序:
import random
def show_data(data):
for i in data:
print(i, end=',')
def heapify(data, n, i):
"""将子树调整为大顶堆"""
c1 = 2*i + 1
c2 = 2*i + 2
maxIndex = i
if c1 < n and data[c1] > data[maxIndex]:
maxIndex = c1
if c2 < n and data[c2] > data[maxIndex]:
maxIndex = c2
if maxIndex != i:
data[maxIndex], data[i] = data[i], data[maxIndex]
heapify(data, n, maxIndex)
def heap_sort(data):
"""堆排序"""
print("排序前:")
show_data(data)
for i in range(len(data)//2-1, -1, -1):
heapify(data, len(data), i)
for i in range(len(data)-1, 0, -1):
data[0], data[i] = data[i], data[0]
heapify(data, i, 0)
print("\n排序后:")
show_data(data)
>>data = [i for i in range(100)]
>>random.shuffle(data)
>>heap_sort(data)
排序前:
89,4,42,51,93,25,62,50,60,75,5,37,3,27,54,79,87,43,98,48,64,10,70,13,83,20,41,90,35,21,40,19,53,36,78,57,81,26,92,86,7,66,59,69,63,99,44,2,45,29,24,94,32,97,55,85,73,1,74,71,65,80,9,17,82,14,88,39,28,58,11,22,18,6,52,56,95,47,46,33,91,84,38,96,23,34,77,31,61,16,15,68,12,0,76,72,30,67,49,8,
排序后:
0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,
快速排序:
import random
def show_data(data):
for i in data:
print(i, end=',')
def quick_sort(data, left, right):
"""快速排序"""
if left < right:
mid = partition(data,left, right)
quick_sort(data, left, mid-1)
quick_sort(data, mid+1,right)
def partition(data, left, right):
pivot = data[left]
while left < right:
while left < right and data[right] >= pivot:
right -= 1
data[left] = data[right]
while left < right and data[left] <= pivot:
left += 1
data[right] = data[left]
data[left] = pivot
return left
>>data = [i for i in range(100)]
>>random.shuffle(data)
>>print("排序前:")
>>show_data(data)
>>quick_sort(data, 0, len(data)-1)
>>print("\n排序后:")
>>show_data(data)
排序前:
48,47,84,45,85,32,64,24,11,89,5,50,16,91,38,75,22,15,36,9,2,7,58,10,87,23,25,29,18,95,70,98,80,37,34,96,56,21,82,72,55,74,99,33,62,3,14,26,97,53,4,66,78,1,88,90,8,0,68,86,92,43,46,30,31,57,27,35,59,69,40,71,81,28,65,42,20,17,41,52,19,44,60,93,94,76,63,6,61,49,77,13,39,73,12,83,51,79,54,67,
排序后:
0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,
计数排序:
import random
def show_data(data):
for i in data:
print(i,end=' ')
def count_sort(data):
"""计数排序"""
print('排序前:')
show_data(data)
maxVal, minVal = max(data), min(data)
#建桶
buckets = [0] * (maxVal - minVal + 1)
#计数
for i in data:
buckets[i-minVal] += 1
data.clear()
result = []
for ele, times in enumerate(buckets):
for i in range(times):
result.append(ele+minVal)
print('\n排序后:')
show_data(result)
return result
>>data = [random.randint(20,60) for i in range(100)]
>>count_sort(data)
排序前:
58 60 53 24 43 32 47 28 26 32 48 48 56 44 56 23 35 21 53 40 27 43 26 34 51 27 53 58 22 21 47 27 33 49 23 22 46 31 26 50 50 43 48 32 30 40 59 32 27 28 49 32 22 38 48 59 51 21 55 38 50 33 54 52 50 57 41 53 20 48 56 32 52 40 35 37 41 56 24 24 49 35 59 51 53 20 31 51 60 21 38 29 33 48 46 49 56 21 26 27
排序后:
20 20 21 21 21 21 21 22 22 22 23 23 24 24 24 26 26 26 26 27 27 27 27 27 28 28 29 30 31 31 32 32 32 32 32 32 33 33 33 34 35 35 35 37 38 38 38 40 40 40 41 41 43 43 43 44 46 46 47 47 48 48 48 48 48 48 49 49 49 49 50 50 50 50 51 51 51 51 52 52 53 53 53 53 53 54 55 56 56 56 56 56 57 58 58 59 59 59 60 60