用ST写一个冒泡排污程序
时间: 2023-10-28 15:06:12 浏览: 139
以下是一个解决最短连线问题的Python代码示例:
```python
import random
import math
import tkinter as tk
class Point:
def __init__(self, x, y):
self.x = x
self.y = y
class Line:
def __init__(self, start_point, end_point, color):
self.start_point = start_point
self.end_point = end_point
self.color = color
class Map:
def __init__(self, width, height, n):
self.width = width
self.height = height
self.n = n
self.points = []
self.lines = []
def generate_points(self):
for i in range(self.n):
x = random.randint(0, self.width)
y = random.randint(0, self.height)
self.points.append(Point(x, y))
def preset_points(self, points):
self.points = points
def add_line(self, start_point, end_point, color):
self.lines.append(Line(start_point, end_point, color))
def euclidean_distance(self, p1, p2):
return math.sqrt((p1.x - p2.x) ** 2 + (p1.y - p2.y) ** 2)
def manhattan_distance(self, p1, p2):
return abs(p1.x - p2.x) + abs(p1.y - p2.y)
def can_connect(self, p1, p2):
return True # 自定义连线规则
def find_shortest_path(self):
for i in range(self.n):
for j in range(i+1, self.n):
if self.can_connect(self.points[i], self.points[j]):
self.add_line(self.points[i], self.points[j], 'black')
# Kurskal算法求解最小生成树
self.lines.sort(key=lambda l: self.euclidean_distance(l.start_point, l.end_point))
connected_points = []
for line in self.lines:
if len(connected_points) == self.n:
break
if line.start_point in connected_points and line.end_point in connected_points:
continue
self.add_line(line.start_point, line.end_point, 'blue')
connected_points.append(line.start_point)
connected_points.append(line.end_point)
def draw(self):
root = tk.Tk()
canvas = tk.Canvas(root, width=self.width, height=self.height)
canvas.pack()
for point in self.points:
canvas.create_oval(point.x-3, point.y-3, point.x+3, point.y+3, fill='red')
for line in self.lines:
canvas.create_line(line.start_point.x, line.start_point.y, line.end_point.x, line.end_point.y, fill=line.color)
root.mainloop()
if __name__ == '__main__':
m = Map(600, 400, 10)
m.generate_points()
m.find_shortest_path()
m.draw()
```
在上述代码中,首先定义了`Point`和`Line`类来表示点和线段。然后定义了`Map`类来表示整个方格地图,其中包括地图的宽度、高度和点的数量,以及点和线段的列表。`Map`类还提供了一些方法来生成随机点、预置点、添加线段、计算点之间的距离、判断两个点是否可以连线等。最重要的是`Map`类中的`find_shortest_path`方法,它使用Kurskal算法来求解最小生成树,并将最小生成树中的线段添加到地图的线段列表中。
在主程序中,首先创建了一个`Map`对象,并调用`generate_points`方法生成随机点。然后调用`find_shortest_path`方法求解最短连线,并调用`draw`方法将点和线段绘制在画布上。
需要注意的是,在`Map`类中的`can_connect`方法中,可以自定义连线规则,以决定两个点是否可以连线。在本代码中,我们将连线规则设为始终可以连线,即`return True`。如果需要更复杂的连线规则,可以在该方法中进行相应的修改。
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