使用 PyGame 的气泡分类可视化工具
原文:https://www . geesforgeks . org/bubble-sort-visualizer-using-pygame/
在本文中，我们将看到如何使用 pygame 可视化冒泡排序算法，即当 PyGame 应用程序启动时，我们可以看到不同高度的未排序条，当我们单击空格键时，它开始以冒泡排序方式排列，即每次迭代后，最大值元素应该最终出现。
冒泡排序是一种简单的算法，用于对以具有 n 个元素的数组的形式提供的 n 个元素的给定集合进行排序。冒泡排序逐个比较所有元素，并根据它们的值对它们进行排序。
实施步骤:
1.创建主窗口 2。用黑色填充主窗口 3。创建一个方法来显示它们之间有特定间隙的酒吧列表 4。获取用户输入的按键 5。如果按下空格键，开始排序过程 6。对列表实施冒泡排序算法 7。每次内部迭代后，用黑色填充屏幕，并调用 show 方法以条形图的形式显示迭代列表。
下面是实现
# importing pygame
import pygame
pygame.init()
# setting window size
win = pygame.display.set_mode((500, 400))
# setting title to the window
pygame.display.set_caption("Bubble sort")
# initial position
x = 40
y = 40
# width of each bar
width = 20
# height of each bar (data to be sorted)
height = [200, 50, 130, 90, 250, 61, 110,
88, 33, 80, 70, 159, 180, 20]
run = True
# method to show the list of height
def show(height):
# loop to iterate each item of list
for i in range(len(height)):
# drawing each bar with respective gap
pygame.draw.rect(win, (255, 0, 0), (x + 30 * i, y, width, height[i]))
# infinite loop
while run:
# execute flag to start sorting
execute = False
# time delay
pygame.time.delay(10)
# getting keys pressed
keys = pygame.key.get_pressed()
# iterating events
for event in pygame.event.get():
# if event is to quit
if event.type == pygame.QUIT:
# making run = false so break the while loop
run = False
# if space bar is pressed
if keys[pygame.K_SPACE]:
# make execute flag to true
execute = True
# checking if execute flag is false
if execute == False:
# fill the window with black color
win.fill((0, 0, 0))
# call the height method to show the list items
show(height)
# update the window
pygame.display.update()
# if execute flag is true
else:
# start sorting using bubble sort technique
for i in range(len(height) - 1):
# after this iteration max element will come at last
for j in range(len(height) - i - 1):
# starting is greater then next element
if height[j] > height[j + 1]:
# save it in temporary variable
# and swap them using temporary variable
t = height[j]
height[j] = height[j + 1]
height[j + 1] = t
# fill the window with black color
win.fill((0, 0, 0))
# call show method to display the list items
show(height)
# create a time delay
pygame.time.delay(50)
# update the display
pygame.display.update()
# exiting the main window
pygame.quit()
输出:
[https://media.geeksforgeeks.org/wp-content/uploads/20200419005933/Bubble-sort-19-04-2020-00_07_00.mp4](https://media.geeksforgeeks.org/wp-content/uploads/20200419005933/Bubble-sort-19-04-2020-00_07_00.mp4)版权属于：月萌API www.moonapi.com，转载请注明出处
