python运用turtle 画出汉诺塔搬运过程

python运用turtle 画出汉诺塔搬运过程

1.打开 IDLE 点击File-New File 新建立一个py文件

2.向py文件中输入如下代码

 1 import turtle
 2 class Stack:  #面向对象，定义一个类
 3     def __init__(self):
 4         self.items = []
 5     def isEmpty(self):
 6         return len(self.items) == 0
 7     def push(self, item):
 8         self.items.append(item)
 9     def pop(self):
10         return self.items.pop()
11     def peek(self):
12         if not self.isEmpty():
13             return self.items[len(self.items) - 1]
14     def size(self):
15         return len(self.items)
16 def drawpole_3():  #这里是绘制三个塔柱子
17     t = turtle.Turtle()
18     t.hideturtle()
19     def drawpole_1(k):
20         t.up()
21         t.pensize(10)
22         t.speed(100)
23         t.goto(400*(k-1), 300)
24         t.down()
25         t.goto(400*(k-1), -100)
26         t.goto(400*(k-1)-20, -100)
27         t.goto(400*(k-1)+20, -100)
28     drawpole_1(0)
29     drawpole_1(1)
30     drawpole_1(2)
31 def creat_plates(n): #按照输入的n来画出盘子个数
32     plates=[turtle.Turtle() for i in range(n)]
33     for i in range(n):
34         plates[i].up()
35         plates[i].hideturtle()
36         plates[i].shape("square")
37         plates[i].shapesize(1,20-i)
38         plates[i].goto(-400,-90+20*i)
39         plates[i].showturtle()
40     return plates
41 def pole_stack(): #这里运用栈来控制一次只能搬动一个盘子并且递归
42     poles=[Stack() for i in range(3)]
43     return poles
44 def moveDisk(plates,poles,fp,tp): #搬动盘子
45     mov=poles[fp].peek()
46     plates[mov].goto((fp-1)*400,300)
47     plates[mov].goto((tp-1)*400,300)
48     l=poles[tp].size()
49     plates[mov].goto((tp-1)*400,-90+20*l)
50 def moveTower(plates,poles,height,fromPole, toPole, withPole): 
51     if height >= 1:
52         moveTower(plates,poles,height-1,fromPole,withPole,toPole)
53         moveDisk(plates,poles,fromPole,toPole)
54         poles[toPole].push(poles[fromPole].pop())
55         moveTower(plates,poles,height-1,withPole,toPole,fromPole)
56 myscreen=turtle.Screen()
57 drawpole_3()
58 n=int(input("请输入汉诺塔的层数并回车:
"))
59 plates=creat_plates(n)
60 poles=pole_stack()
61 for i in range(n):
62     poles[0].push(i)
63 moveTower(plates,poles,n,0,2,1)
64 myscreen.exitonclick()

3. 点击 Run-Run Module 或者F5 运行程序

这个时候会出现两个窗口，在左边窗口按照提示输入，右边则是turtle的画布

4.运行 例子:在左边窗口输入3 回车

完成~~~~~~~~~~

（ps：输入的数字越大，花的时间更久，然后要防止自己的电脑cpu过载！！）

可自行输入别的数字