实验六

task1

 1 from turtle import *
 2 def move(x, y):
 3     penup()
 4     goto(x, y)
 5     pendown()
 6 def draw(n, size = 100):
 7     for i in range(n):
 8         fd(size)
 9         left(360/n)
10 def main():
11     pensize(2)
12     pencolor('red')
13     move(-200, 0)
14     draw(3)
15     move(0, 0)
16     draw(4)
17     move(200, 0)
18     draw(5)
19     hideturtle()
20     done()
21 main()

task2

 1 from turtle import *
 2 def moveto(x, y):
 3     penup()
 4     goto(x, y)
 5     pendown()
 6 def main():
 7     pensize(2)
 8     pencolor('blue')
 9     moveto(-150, 0)
10     circle(50)
11     moveto(0, 0)
12     circle(50, steps = 4)
13     moveto(150, 0)
14     circle(50, steps = 5)
15     moveto(300, 0)
16     circle(50, steps = 6)
17     hideturtle()
18     done()
19 main()

实验任务2

task1

 1 from turtle import *
 2 def moveto(x, y):
 3     penup()
 4     goto(x, y)
 5     pendown()
 6 def main():
 7     setup(800, 600)
 8     radius = 20
 9     offset = 20
10     for i in range(9):
11         moveto(0, -radius)
12         circle(radius)
13         radius += offset
14     hideturtle()
15     done()
16 main()

task2

 1 from turtle import *
 2 from random import random
 3 def moveto(x, y):
 4     penup()
 5     goto(x, y)
 6     pendown()
 7 def gen_color():
 8     return tuple((random() for i in range(3)))
 9 def main():
10     setup(800, 600)
11     radius = 180
12     offset = 20
13     for i in range(8):
14         moveto(0, -radius)
15         color(gen_color())
16         begin_fill()
17         circle(radius)
18         end_fill()
19         radius -= offset
20     hideturtle()
21     done()
22 main()

实验任务3

task1

 1 from turtle import *
 2 def square(size = 50, rgb = 'orange'):
 3     pencolor(rgb)
 4     for i in range(4):
 5         fd(size)
 6         left(90)
 7 def main():
 8     setup(800, 600)
 9     speed(0)
10     n = 10
11     for i in range(n):
12         square(80)
13         left(360/n)
14     hideturtle()
15     done()
16 main()

task2

 1 from turtle import *
 2 setup(800, 600)
 3 pencolor('pink')
 4 n = 10
 5 for i in range(10):
 6     # 绘制一片花瓣
 7     for j in range(2):
 8         circle(80, 90)
 9         left(90)
10     right(360/n)
11 hideturtle()
12 done()

 1 from turtle import *
 2 setup(800, 600)
 3 bgcolor('black')
 4 pencolor('white')
 5 speed(0)
 6 angle = 0
 7 size = 2
 8 n = 5
 9 count = 50
10 for i in range(count):
11     fd(size)
12     angle += 360/n
13     seth(angle)
14     size += 5
15 hideturtle()
16 done()

 1 from turtle import *
 2 def moveto(x, y):
 3     penup()
 4     goto(x, y)
 5     pendown()
 6 
 7 def main():
 8     moveto(-100,-100)
 9     color('black')
10     begin_fill()
11     for i in range(4):
12         forward(200)
13         left(90)
14     end_fill()
15     color('red')
16     begin_fill()
17     moveto(0,-100)
18     circle(100,steps=4)
19     end_fill()
20 main()

 1 from turtle import *
 2 def moveto(x, y):
 3     penup()
 4     goto(x, y)
 5     pendown()
 6 
 7 def main():
 8     pencolor('blue')
 9     pensize(2)
10     n=40
11     for i in range(5):
12         moveto(0,0)
13         forward(n)
14         left(90)
15         circle(n,90)
16         left(90)
17         forward(n)
18         left(90)
19         n+=20
20 
21 main()

 1 from turtle import *
 2 def moveto(x, y):
 3     penup()
 4     goto(x, y)
 5     pendown()
 6 
 7 def main():
 8     bgcolor('black')
 9     color('yellow')
10     begin_fill()
11     moveto(0,0)
12     left(45)
13     forward(100)
14     left(90)
15     circle(100,270)
16     left(90)
17     forward(100)
18     end_fill()
19     moveto(15,60)
20     color('black')
21     begin_fill()
22     circle(10,360)
23     end_fill()
24     moveto(5,55)
25     color('white')
26     begin_fill()
27     circle(2,360)
28     end_fill()
29 hideturtle()
30 main()