import turtleclass Stack:def __init__(self):self.items = []def isEmpty(self):return len(self.items) == 0def 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():#画出汉诺塔的polest = turtle.Turtle()t.hideturtle()def drawpole_1(k):t.up()t.pensize(10)t.speed(100)t.goto(400*(k-1), 100)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)#画出汉诺塔的poles[0]drawpole_1(1)#画出汉诺塔的poles[1]drawpole_1(2)#画出汉诺塔的poles[2]def creat_plates(n):#制造n个盘子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(1,8-i)plates[i].goto(-400,-90+20*i)plates[i].showturtle()return platesdef pole_stack():#制造poles的栈poles=[Stack() for i in range(3)]return polesdef moveDisk(plates,poles,fp,tp):#把poles[fp]顶端的盘子plates[mov]从poles[fp]移到poles[tp]mov=poles[fp].peek()plates[mov].goto((fp-1)*400,150)plates[mov].goto((tp-1)*400,150)l=poles[tp].size()#确定移动到底部的高度（恰好放在原来最上面的盘子上面）plates[mov].goto((tp-1)*400,-90+20*l)def moveTower(plates,poles,height,fromPole, toPole, withPole):#递归放盘子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()