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Question

我试图用python的乌龟函数递归绘制一个正方形，并在正方形内，递归地在其中绘制四个，在这四个内部，还有四个。 我的代码通过右上角，但返回代码时出错。这是：

import turtle
turtle.speed(0)
def drawSquare(xCenter, yCenter, edgeLength, depthLeft):
    xCenter = xCenter
    yCenter = yCenter
    edgeLength = edgeLength
    depthLeft = depthLeft
    if depthLeft == 0:
        return 
    else:
        turtle.penup()
        turtle.goto((xCenter-.5*edgeLength),(yCenter-.5*edgeLength))
        turtle.pendown()

        for i in range(4):
            turtle.forward(edgeLength)
            turtle.left(90)

        depthLeft = depthLeft - 1
        edgeLength = edgeLength/4
        drawSquare(xCenter+edgeLength,yCenter+edgeLength,edgeLength, depthLeft)
        drawSquare(xCenter-edgeLength,yCenter+edgeLength,edgeLength, depthLeft)
        drawSquare(xCenter+edgeLength,yCenter-edgeLength,edgeLength, depthLeft)
        drawSquare(xCenter-edgeLength,yCenter-edgeLength,edgeLength, depthLeft) 

    turtle.exitonclick()

drawSquare(0,0,500,2)

Answer 1

您的代码似乎没有任何问题。我能够删除turtle.exitonclick()并使用https://repl.it/languages/python_turtle

毫无问题地运行它

我甚至将初始深度调到4以获得这个可爱的形象

<强>说明

这段代码没有做任何事情，你可以删除它

xCenter = xCenter
yCenter = yCenter
edgeLength = edgeLength
depthLeft = depthLeft