• tuetle制作汉诺塔


    代码如下

    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(200*(k-1), 300)
            t.down()
            t.goto(200*(k-1), -100)
            t.goto(200*(k-1)-20, -100)
            t.goto(200*(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:
    "))
    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()

    效果如下:

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  • 原文地址:https://www.cnblogs.com/zk1135/p/10611479.html
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