Question

。问题：实施以下伪代码以在屏幕上绘制方格旗。

1.  Ask the user for the size of the checkered flag (n).
2.  Draw an n x n grid to the screen.
3.  For i = 0,2,4,...,62:
4.     row = i // n
5.     offset = row % 2
6.     col = (i % n) + offset

请复制并粘贴该链接，请参阅输出：http://www.awesomescreenshot.com/image/45977/12eaef67de44c2b291ecd47fe8d10135

我实现了伪代码，但我需要一些帮助。

我能够绘制n * n网格，但之后什么也没发生。我认为我在main()函数中做错了什么我的节目：

from turtle import*

def size():
  size = eval(input("Please enter the size of the checkered flag: "))
  return size

def draw(n):
  wn = Screen()
  wn.setworldcoordinates(-1,-1,10,10)
  pen = Turtle()
  for i in range(0,n+1):
    pen.up()
    pen.goto(0,i)
    pen.down()
    pen.forward(n)

  pen.left(90)
  for i in range(0,n+1):
    pen.up()
    pen.goto(i,0)
    pen.down()
    pen.forward(n)

def findGrid(n):
  for i in range(0,63):
    row = i // n
    offset = row % 2
    col = (i % n) + offset

  return row, col

def fillSquare(x,y):
  pen = Turtle()
  pen.hideturtle()
  pen.speed(10)
  pen.up()
  pen.goto(x,y)
  pen.fillcolor("black")
  pen.begin_fill()

def main():
  x = size()
  y = draw(x)
  row, col = findGrid(x)        #I think there is a problem here. Please help!
  f = fillSquare(row, col)

main()

Answer 1

将尺寸功能中的input更改为raw_input

def size():
    size = eval(raw_input("Please enter the size of the checkered flag: "))
    return size

eval处理字符串，并传递 int 值。

如何为函数输入两个参数？

1 个答案: