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

 import turtle
 class Stack:  #面向对象，定义一个类
     def __init__(self):
         self.items = []
     def isEmpty(self):
         return len(self.items) == 0
     def push(self, item):
         self.items.append(item)
     def pop(self):
         return self.items.pop()
     def peek(self):
         if not self.isEmpty():
             return self.items[len(self.items) - 1]
     def size(self):
         return len(self.items)
 def drawpole_3():  #这里是绘制三个塔柱子
     t = turtle.Turtle()
     t.hideturtle()
     def drawpole_1(k):
         t.up()
         t.pensize(10)
         t.speed(100)
         t.goto(400*(k-1), 300)
         t.down()
         t.goto(400*(k-1), -100)
         t.goto(400*(k-1)-20, -100)
         t.goto(400*(k-1)+20, -100)
     drawpole_1(0)
     drawpole_1(1)
     drawpole_1(2)
 def creat_plates(n): #按照输入的n来画出盘子个数
     plates=[turtle.Turtle() for i in range(n)]
     for i in range(n):
         plates[i].up()
         plates[i].hideturtle()
         plates[i].shape("square")
         plates[i].shapesize(1,20-i)
         plates[i].goto(-400,-90+20*i)
         plates[i].showturtle()
     return plates
 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
     poles=[Stack() for i in range(3)]
     return poles
 def moveDisk(plates,poles,fp,tp): #搬动盘子
     mov=poles[fp].peek()
     plates[mov].goto((fp-1)*400,300)
     plates[mov].goto((tp-1)*400,300)
     l=poles[tp].size()
     plates[mov].goto((tp-1)*400,-90+20*l)
 def moveTower(plates,poles,height,fromPole, toPole, withPole):
     if height >= 1:
         moveTower(plates,poles,height-1,fromPole,withPole,toPole)
         moveDisk(plates,poles,fromPole,toPole)
         poles[toPole].push(poles[fromPole].pop())
         moveTower(plates,poles,height-1,withPole,toPole,fromPole)
 myscreen=turtle.Screen()
 drawpole_3()
 n=int(input("请输入汉诺塔的层数并回车:\n"))
 plates=creat_plates(n)
 poles=pole_stack()
 for i in range(n):
     poles[0].push(i)
 moveTower(plates,poles,n,0,2,1)
 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