实验6

1、实验任务1

task1_1.py

实验源码：

 1 from turtle import *
 2 
 3 def move(x,y):
 4     penup()
 5     goto(x,y)
 6     pendown()
 7 
 8 def draw(n,size = 100):
 9     for i in range(n):
10         fd(size)
11         left(360/n)
12 
13 def main():
14     pensize(2)
15     pencolor('red')
16 
17     move(-200,0)
18     draw(3)
19 
20     move(0,0)
21     draw(4)
22 
23     move(200,0)
24     draw(5)
25 
26     hideturtle()
27     done()
28 
29 main()

运行测试截图：

task1_2.py

实验源码：

 1 from turtle import *
 2 
 3 def moveto(x,y):
 4     penup()
 5     goto(x,y)
 6     pendown()
 7 
 8 def main():
 9     pensize(2)
10     pencolor('blue')
11 
12     moveto(-150,0)
13     circle(50)
14 
15     moveto(0,0)
16     circle(50,steps=4)
17 
18     moveto(150,0)
19     circle(50,steps=5)
20 
21     moveto(300,0)
22     circle(50,steps=6)
23 
24     hideturtle()
25     done()
26 
27 main()

运行测试截图:

 2、实验任务2

task2_1.py

实验源码：

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

运行测试截图：

 task2_2.py

实验源码：

 1 from turtle import *
 2 from random import random
 3 
 4 
 5 def moveto(x,y):
 6     penup()
 7     goto(x, y)
 8     pendown()
 9 
10 
11 def gen_color():
12     return tuple((random() for i in range(3)))
13 
14 
15 def main():
16     setup(800, 600)
17 
18     radius = 180
19     offset = 20
20 
21     for i in range(8):
22         moveto(0, -radius)
23         color(gen_color())
24 
25         begin_fill()
26         circle(radius)
27         end_fill()
28 
29         radius -= offset
30 
31     hideturtle()
32     done()
33 
34 
35 main()

运行测试截图：

 3、实验任务3

用矩形绘制花瓣

实验源码：

 1 from turtle import *
 2 
 3 def square(size = 50, rgb = 'pink'):
 4     pencolor(rgb)
 5     for i in range(4):
 6         fd(size)
 7         left(90)
 8 
 9 def main():
10     setup(800,600)
11     speed(0)
12 
13     n = 3
14     for i in range(n):
15         square(80)
16         left(360/n)
17 
18     hideturtle()
19     done()
20 
21 main()

运行测试截图：

 task3_1.py

实验源码：

 1 from turtle import *
 2 
 3 def square(size = 50, rgb = 'yellow'):
 4     pencolor(rgb)
 5     for i in range(4):
 6         fd(size)
 7         left(90)
 8 
 9 def main():
10     setup(800,600)
11     speed(0)
12 
13     n = 10
14     for i in range(n):
15         square(80)
16         left(360/n)
17 
18     hideturtle()
19     done()
20 
21 main()

运行测试截图：

 task3_2.py

运行测试截图：

 1 from turtle import *
 2 
 3 setup(800,600)
 4 pencolor('pink')
 5 
 6 n = 10
 7 for i in range(n):
 8     for j in range(2):
 9         circle(80,90)
10         left(90)
11 
12     right(360/n)
13 
14 hideturtle()
15 done()

运行测试截图：

 4、实验任务4

task4.py

实验源码：

 1 from turtle import *
 2 
 3 setup(800,600)
 4 bgcolor('black')
 5 pencolor('white')
 6 speed(0)
 7 
 8 angle = 0
 9 size = 2
10 
11 n = 5
12 count = 50
13 for i in range(count):
14     fd(size)
15     angle +=360/n 
16     seth(angle)
17     size+=5
18 
19 hideturtle()
20 done()

运行测试截图：

 5、实验任务5

task5_1.py

实验源码：

 1 from turtle import *
 2 penup()
 3 goto(-100,-100)
 4 pendown()
 5 color('black')
 6 begin_fill()
 7 for i in range(4):
 8     fd(200)
 9     left(90)
10 end_fill()
11 penup()
12 goto(-100,0)
13 pendown()
14 seth(45)
15 color('red')
16 begin_fill()
17 for i in range(4):
18     fd(100*(2**0.5))
19     right(90)
20 end_fill()
21 done()

运行测试截图：

 task5_2.py

实验源码：

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

运行测试截图：

 6、实验任务6

task6.py

实验源码：

 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 
10 
11 setup(800,600)
12 a = 50
13 b = 25
14 moveto(-10*b,a/2)
15 for i in range(20):
16     color(gen_color())
17     begin_fill()
18     fd(b)
19     right(90)
20     fd(a)
21     right(90)
22     fd(b)
23     right(90)
24     fd(a)
25     moveto(-10*b+i*b,a/2)
26     seth(0)
27     end_fill()
28 done()

运行测试截图：