实验六

实验任务1

task1：

 1 from turtle import *
 2 
 3 def move(x, y):
 4     '''画笔移动到坐标（x,y）处'''
 5     penup()
 6     goto(x, y)
 7     pendown()
 8 
 9 def draw(n, size = 100):
10     '''绘制边长为size的正n边形'''
11     for i in range(n):
12         fd(size)
13         left(360/n)
14 
15 def main():
16     pensize(2)
17     pencolor('red')
18 
19     move(-200, 0)
20     draw(3)
21 
22     move(0, 0)
23     draw(4)
24 
25     move(200, 0)
26     draw(5)
27 
28     hideturtle()
29     done()
30 
31 main()

运行结果：

task1_2：

 1 from turtle import *
 2 
 3 def moveto(x, y):
 4     '''画笔移动到坐标（x,y）处'''
 5     penup()
 6     goto(x, y)
 7     pendown()
 8 
 9 
10 def main():
11     pensize(2)
12     pencolor('blue')
13 
14     moveto(-150, 0)
15     circle(50)
16 
17     moveto(0, 0)
18     circle(50,steps = 4)
19 
20     moveto(150, 0)
21     circle(50, steps = 5)
22 
23     moveto(300, 0)
24     circle(50, steps = 6)
25 
26     hideturtle()
27     done()
28 
29 main()

实验任务2

task2：

 1 from turtle import *
 2 
 3 def moveto(x, y):
 4     '''画笔移动到坐标（x,y）处'''
 5     penup()
 6     goto(x, y)
 7     pendown()
 8 
 9 
10 def main():
11     setup(800, 600)
12 
13     radius = 20
14     offset = 20
15 
16     for i in range(9):
17         moveto(0, -radius)
18         circle(radius)
19         radius += offset
20 
21     hideturtle()
22     done()
23 
24 main()

运行结果：

task2_2：

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

运行结果：

实验任务3

task3_1：

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

运行结果：

task3_2：

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

运行结果：

实验任务4

task4：

 1 from turtle import *
 2 
 3 setup(1600,1200)
 4 bgcolor('black')
 5 pencolor('white')
 6 speed(0)
 7 
 8 angle=0
 9 size=1
10 
11 n=5
12 count=100
13 for i in range(count):
14     fd(size)
15     angle+=360/n
16     seth(angle)
17     size+=5
18 
19 hideturtle()
20 done()

运行结果：

实验任务5

task5_1：

 1 from turtle import *
 2 
 3 def move(x,y):
 4     penup()
 5     goto(x,y)
 6     pendown()
 7 
 8 def draw(n,c,size = 100):
 9     color(c)
10     begin_fill()
11 
12     for i in range(n):
13         fd(size)
14         left(360/n)
15     end_fill()
16 
17 move(-100,-100)
18 draw(4,'black',200)
19 
20 move(-100,0)
21 right(45)
22 draw(4,'red',100*(2)**0.5)
23 
24 hideturtle()
25 done()

运行结果：

task5_2：

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

运行结果：

实验任务6

task6：

 1 from turtle import *
 2 speed(0)
 3 def move(x,y):
 4     penup()
 5     goto(x,y)
 6     pendown()
 7 bgcolor('black')
 8 color('yellow')
 9 move(0,-100)
10 begin_fill()
11 circle(100)
12 end_fill()
13 color('black')
14 move(87,-51)
15 seth(60)
16 begin_fill()
17 circle(100,60)
18 home()
19 end_fill()
20 move(-30,50)
21 dot(30,'black')
22 move(-38,58)
23 dot(5,'white')
24 hideturtle()
25 done()

运行结果：