实验六

实验任务一

实验源码：

from turtle import *

def move(x, y):
    penup()
    goto(x, y)
    pendown()

def draw(n, size = 100):
    for i in range(n):
        fd(size)
        left(360/n)

def main():
    pensize(2)
    pencolor('red')

    move(-200,0)
    draw(3)

    move(0, 0)
    draw(4)

    move(200, 0)
    draw(5)

    hideturtle()
    done()


main()

实验截图：

实验源码：

from turtle import *

def moveto(x, y):
    penup()
    goto(x, y)
    pendown()

def main():
    pensize(2)
    pencolor('blue')

    moveto(-150, 0)
    circle(50)

    moveto(0, 0)
    circle(50, steps = 4)

    moveto(150, 0)
    circle(50, steps = 5)

    moveto(300, 0)
    circle(50, steps = 6)


    hideturtle()
    done()

main()

实验截图：

 

实验任务二

实验源码：

from turtle import *
def moveto(x, y):
    penup()
    goto(x, y)
    pendown()

def main():
    setup(800, 600)

    radius = 20
    offset = 20

    for i in range(9):
        moveto(0, -radius)
        circle(radius)
        radius += offset
    hideturtle()
    done()

main()

实验截图：

实验源码：

from turtle import *
from random import random

def moveto(x, y):
    penup()
    goto(x, y)
    pendown()

def gen_color():
    return tuple((random() for i in range(3)))

def main():
    setup(800, 600)

    radius = 180
    offset = 20

    for i in range(8):
        moveto(0, -radius)
        color(gen_color())

        begin_fill()
        circle(radius)
        end_fill()

        radius -= offset

    hideturtle()
    done()

main()

实验截图：

task3-1

程序源码：

 1 from turtle import *
 2 
 3 def square(size = 50, rgb = 'orange'):
 4     '''绘制正方形
 5     :para: size:int 指定边长 (如未指定参数，使用默认值）
 6     :para: c: str 指定画笔颜色值 (如未指定参数，使用默认值）
 7     '''
 8 
 9     pencolor(rgb)
10     for i in range(4):
11         fd(size)
12         left(90)
13 
14 def main():
15     setup(800, 600)
16     speed(0)
17 
18     n = 10
19     for i in range(n):
20         square(80)
21         left(360/n)
22 
23     hideturtle()
24     done()
25 
26 main()

运行截图：

 

task3-2

程序源码：

 1 from turtle import *
 2 
 3 setup(800, 600)
 4 pencolor('pink')
 5 
 6 n = 10
 7 for i in range(n):
 8     # 绘制一片花瓣
 9     for j in range(2):
10         circle(80, 90)
11         left(90)
12 
13     right(360/n)
14 
15 hideturtle()
16 done()

运行截图：

 

task4

程序源码：

 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 # 螺旋n边形
12 count =50 # 循环次数
13 for i in range(count):
14     fd(size)
15     angle += 360/n
16     seth(angle)
17     size += 5
18 
19 hideturtle()
20 done()

运行截图：

 

task5-1

程序源码：

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

运行截图：

 

task5-2

程序源码：

 1 from turtle import *
 2 color('blue')
 3 r = 20
 4 for i in range(5):
 5     r += 20
 6     forward(r)
 7     left(90)
 8     circle(r,90)
 9     left(90)
10     forward(r)
11     left(90)
12     forward(40)
13     goto(0,0)
14 hideturtle()
15 done()

运行截图：

 

task6

程序源码：

 1 #6
 2 from turtle import *
 3 bgcolor('black')
 4 pencolor('yellow')
 5 
 6 color('yellow')
 7 begin_fill()
 8 left(45)
 9 fd(100)
10 left(90)
11 circle(100,270)
12 left(90)
13 fd(100)
14 end_fill()
15 
16 penup()
17 goto(0,60)
18 pendown()
19 color('black')
20 begin_fill()
21 circle(10)
22 end_fill()
23 
24 color('white')
25 begin_fill()
26 penup()
27 goto(-10,60)
28 pendown()
29 circle(2)
30 end_fill()
31 
32 hideturtle()
33 done()

运行截图：