实验六

实验任务一

task1_1

实验源码：

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

实验结果截图：

task1_2

实验源码：

 1 from turtle import *
 2 
 3 def moveto(x,y):#circle()函数，实现正多边形绘制
 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()

实验结果截图：

实验任务二

task2_1

实验源码：

 1 from turtle import *
 2 #使用turtle绘制九个同心圆
 3 def moveto(x,y):
 4 
 5     penup()
 6     goto(x,y)
 7     pendown()
 8 
 9 def main():
10     setup(800,600)
11     radius=20
12     offset=20
13 
14     for i in range(9):
15         moveto(0,-radius)
16         circle(radius)
17         radius+=offset
18 
19     hideturtle()
20     done()
21 
22 main()

实验结果截图：

task2_2

实验源码：

 1 from turtle import *
 2 from random import random
 3 
 4 def moveto(x,y):
 5     penup()
 6     goto(x,y)
 7     pendown()
 8 
 9 def gen_color():#生成一个以RGB三元组表示颜色值并返回
10 
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())#设置
22 
23         begin_fill()#开始填充图形
24         circle(radius)#设置画笔颜色
25         end_fill()#填充完成
26 
27         radius-=offset
28 
29     hideturtle()
30     done()
31 
32 main()

实验结果截图：

实验任务三

task3_1

实验源码：

 1 from turtle import *
 2 def square(size = 50, rgb = 'pink'):
 3     '''绘制正方形
 4     :para: size:int 指定边长 (如未指定参数，使用默认值）
 5     :para: c: str 指定画笔颜色值 (如未指定参数，使用默认值）'''
 6     pencolor(rgb)
 7     for i in range(4):
 8         fd(size)
 9         left(90)
10 def main():
11     setup(800, 600)
12     speed(0)
13     n = 3
14     for i in range(n):
15         square(80)
16         left(360/n)
17     hideturtle()
18     done()
19 main()

实验结果截图：

task3_2

实验源码：

 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         fillcolor('red')
 9         begin_fill()
10         circle(80, 90)
11         left(90)
12         end_fill()
13     right(360/n)
14 penup()
15 goto(0,-20)
16 pendown()
17 fillcolor('yellow')
18 begin_fill()
19 circle(20)
20 end_fill()
21 penup()
22 goto(0,-10)
23 pendown()
24 fillcolor('white')
25 begin_fill()
26 circle(10)
27 end_fill()
28 hideturtle()
29 done()

实验结果截图：

实验任务四

实验源码：

 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 = 4 # 螺旋n边形
 9 count = 50 # 循环次数
10 for i in range(count):
11     fd(size)
12     angle += 360/n + 1
13     seth(angle)#seth(角度（可以是整点数，也可以是浮点数）)可以使龟逆时针旋转一定的角度，然后运动
14     size += 5
15 hideturtle()
16 done()

实验结果截图：

 实验任务五

task5_1

实验源码：

 1 from turtle import *
 2 square = Turtle()
 3 square.color('black')
 4 square.penup()
 5 square.goto(-100,-100)
 6 
 7 square.pendown()
 8 square.begin_fill()
 9 for _ in range(4):
10     square.fd(200)
11     square.left(90)
12 square.end_fill()
13 
14 
15 s2 = Turtle()
16 s2.color('red')
17 s2.penup()
18 s2.goto(0,-100)
19 
20 s2.pendown()
21 s2.left(45)
22 s2.begin_fill()
23 for _ in range(4):
24     s2.fd(100*(2**0.5))
25     s2.left(90)
26 s2.end_fill()
27 done()

实验结果截图：

task5_2

 1 from turtle import *
 2 sector = Turtle()
 3 # 初始化绘图参数
 4 sector.penup()
 5 sector.goto(0, 0)
 6 sector.color('blue')
 7 sector.pensize(2)
 8 sector.speed(0)
 9 # 设置扇形数值
10 radius = 40
11 delta_d = 20
12 sector.pendown()
13 for _ in range(5):
14     sector.fd(radius)
15     sector.left(90)
16     sector.circle(radius, extent=90)
17     sector.seth(270)
18     sector.fd(radius)
19     sector.seth(0)
20 
21     radius += delta_d
22 
23 done()

实验结果截图：

实验任务六

实验源码：

 1 from turtle import *
 2 from random import random
 3 strip = Turtle()
 4 setup(800, 600)
 5 strip.speed(0)
 6 # 获取颜色
 7 
 8 
 9 def colors():
10     return tuple(random() for _ in range(3))
11 
12 
13 strip.pendown()
14 for i in range(10):
15     strip.color(colors())
16     strip.begin_fill()
17     for _ in range(2):
18         strip.fd(20)
19         strip.left(90)
20         strip.fd(60)
21         strip.left(90)
22     strip.fd(20)
23     strip.end_fill()
24 
25 strip.penup()
26 strip.goto(0, 0)
27 strip.pendown()
28 
29 for i in range(10):
30     strip.color(colors())
31     strip.begin_fill()
32     strip.seth(180)
33     for _ in range(2):
34         strip.fd(20)
35         strip.right(90)
36         strip.fd(60)
37         strip.right(90)
38     strip.fd(20)
39     strip.end_fill()
40 strip.hideturtle()
41 done()

实验结果截图：