1

我们在我的编程入门课程中使用 JES，但我的实验室遇到了障碍。该程序应该允许用户选择一张图片，然后飞蛾（虫子）将从图片的中心开始并随机移动并将像素更改为白色（如果它们尚未模拟进食）。我被困在运动部分。下面的当前程序将在最中心加载并吃掉 1 个像素，但不进行其他动作。有人可以提示我在随机移动呼叫中做错了什么吗？

from random import *

def main():
 #lets the user pic a file for the bug to eat
 file= pickAFile()
 pic= makePicture(file)
 show(pic)

 #gets the height and width of the picture selected
 picHeight= getHeight(pic)
 picWidth= getWidth(pic)
 printNow("The height is: " + str(picHeight))
 printNow("The width is: " + str(picWidth))

 #sets the bug to the center of the picture
 x= picHeight/2
 y= picWidth/2
 bug= getPixelAt(pic,x,y)

 printNow(x)
 printNow(y)
 color= getColor(bug)
 r= getRed(bug)
 g= getGreen(bug)
 b= getBlue(bug)

 pixelsEaten= 0
 hungerLevel= 0


 while hungerLevel < 400 :

  if r == 255 and g == 255 and b == 255:
   hungerLevel + 1
   randx= randrange(-1,2)
   randy= randrange(-1,2)
   x= x + randx
   y= y + randy
   repaint(pic)


  else:
   setColor(bug, white)
   pixelsEaten += 1
   randx= randrange(-1,2)
   randy= randrange(-1,2)
   x= x + randx
   y= y + randy
   repaint(pic)
4

1 回答 1

0

看起来你永远不会更新循环中错误的位置。您更改xand y，但这对 没有任何影响bug。

尝试：

while hungerLevel < 400 :
    bug= getPixelAt(pic,x,y)
    #rest of code goes here

Incidentally, if you have identical code in an if block and an else block, you can streamline things by moving the duplicates outside of the blocks entirely. Ex:

while hungerLevel < 400 :
    bug= getPixelAt(pic,x,y)
    if r == 255 and g == 255 and b == 255:
        hungerLevel + 1
    else:
        setColor(bug, white)
        pixelsEaten += 1
    randx= randrange(-1,2)
    randy= randrange(-1,2)
    x= x + randx
    y= y + randy
    repaint(pic)
于 2015-06-22T14:19:49.013 回答