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题目：一个最优美的图案。 程序分析：无。 程序源代码： - #!/usr/bin/python
- # -*- coding: UTF-8 -*-
- import math
- class PTS:
- def __init__(self):
- self.x = 0
- self.y = 0
- points = []
- def LineToDemo():
- from Tkinter import *
- screenx = 400
- screeny = 400
- canvas = Canvas(width = screenx,height = screeny,bg = 'white')
- AspectRatio = 0.85
- MAXPTS = 15
- h = screeny
- w = screenx
- xcenter = w / 2
- ycenter = h / 2
- radius = (h - 30) / (AspectRatio * 2) - 20
- step = 360 / MAXPTS
- angle = 0.0
- for i in range(MAXPTS):
- rads = angle * math.pi / 180.0
- p = PTS()
- p.x = xcenter + int(math.cos(rads) * radius)
- p.y = ycenter - int(math.sin(rads) * radius * AspectRatio)
- angle += step
- points.append(p)
- canvas.create_oval(xcenter - radius,ycenter - radius,
- xcenter + radius,ycenter + radius)
- for i in range(MAXPTS):
- for j in range(i,MAXPTS):
- canvas.create_line(points[i].x,points[i].y,points[j].x,points[j].y)
- canvas.pack()
- mainloop()
- if __name__ == '__main__':
- LineToDemo()
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