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：

实验任务三

实验源码：

from turtle import *

def square(size = 50, rgb = 'orange'):

    pencolor(rgb)
    for i in range(4):
        fd(size)
        left(90)

def main():
    setup(800, 600)
    speed(0)

    n = 11
    for i in range(n):
        square(80)
        left(360/n)

    hideturtle()
    done()

main()

实验截图：

实验源码：

from turtle import *

setup(800, 500)
pencolor('pink')

n = 10
for i in range(10):
    for j in range(2):
        circle(80, 90)
        left(90)

    right(360/n)

hideturtle()
done()

实验截图：

实验任务四

实验源码：

from turtle import *

setup(800, 600)
bgcolor('black')
pencolor('white')
speed(0)

angle = 0
size = 2

n = 5
count = 50
for i in range(count):
    fd(size)
    angle += 360/n
    seth(angle)
    size += 5

hideturtle()
done()

实验截图：

实验任务五

实验源码：

from turtle import *

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

pensize(3)
color('black')
begin_fill()
moveto(-100, -100)
for i in range(4):
    fd(200)
    left(360/4)
end_fill()

moveto(0, -100)
color('red')
begin_fill()
circle(100,steps = 4)
end_fill()


hideturtle()
done()

实验截图：

 实验源码：

from turtle import *
pensize(2)
pencolor('blue')
r = 40
for i in range(5):
    fd(r)
    left(90)
    circle(r,90)
    left(90)
    fd(r)
    left(90)
    r += 20

hideturtle()
done()

实验截图：

实验任务六

实验源码：

moveto(200,-200)
color('yellow')
begin_fill()
left(135)
fd(200)
right(90)
fd(200)
left(90)
circle(200,270)
end_fill()

moveto(80,70)
dot(40,'black')
moveto(72,76)
dot(10,'white')

hideturtle()
done()

实验截图：