实验6

1.实验任务1

task1_1.py

程序源代码：

from turtle import *
def move(x, y):
    '''画笔移动到坐标(x,y)处'''
    penup()
    goto(x, y)
    pendown()
def draw(n, size = 100):
    '''绘制边长为size的正n变形'''
    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()

运行程序截图：

 

task1_2.py

程序源代码：

from turtle import *
def moveto(x, y):
    '''画笔移动到坐标(x,y)处'''
    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()

 运行程序截图：

 

2.实验任务2

task2_1.py

程序源代码：

from turtle import *
def moveto(x, y):
    '''画笔移动到坐标(x,y)处'''
    penup()
    goto(x, y)
    pendown()

def main():
    setup(800, 600)
    radius = 20 # 圆初始半径
    offset = 20 # 同心圆每次位移量
    for i in range(9):
        moveto(0, -radius)
        circle(radius)
        radius += offset
    hideturtle()
    done()
main()

 

运行程序截图：

 

 

task2_2.py

程序源代码：

from turtle import *
from random import random
def moveto(x, y):
    '''画笔移动到坐标(x,y)处'''
    penup()
    goto(x, y)
    pendown()
def gen_color():
    return tuple(random() for i in range(3))
def main():
    setup(800, 600)
    radius = 180 # 圆初始半径
    offset = 20 # 同心圆每次位移量
    for i in range(8):
        moveto(0, -radius)
        color(gen_color())
        begin_fill()
        circle(radius)
        end_fill()
        radius += offset
    hideturtle()
    done()
main()

 

运行程序截图：

 

 

3.实验任务3

task3_1.py

程序源代码： 

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 = 10
    for i in range(n):
        square(80)
        left(360/n)
    hideturtle()
    done()
main()

 

 

 

运行程序截图：

 

 

task3_2.py

程序源代码：

from turtle import *
setup(800, 600)
pencolor('pink')
n = 10
for i in range(10):
    # 绘制一片花瓣
    for j in range(2):
        circle(80, 90)
        left(90)
    right(360/n)
hideturtle()
done()

 

 

 

运行程序截图：

 

 

 

4.实验任务4

task4.py

运行源代码：

from turtle import *
setup(800, 600)
bgcolor('black')
pencolor('white')
speed(0)
angle = 0
size = 2
n = 5 # 螺旋n边形
count = 50 # 循环次数
for i in range(count):
    fd(size)
    angle += 360/n
    seth(angle)
    size += 5
hideturtle()
done()

 

程序运行截图：

 

5.实验任务5

task5_1.py

实验源代码：

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

def main():
    moveto(-100,-100)
    color('black')
    begin_fill()
    for i in range(4):
        forward(200)
        left(90)
    end_fill()
    color('red')
    begin_fill()
    moveto(0,-100)
    circle(100,steps=4)
    end_fill()
main()

运行程序截图：

 task5_2.py

程序源代码：

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

def main():
    pencolor('blue')
    pensize(2)
    n=40
    for i in range(5):
        moveto(0,0)
        forward(n)
        left(90)
        circle(n,90)
        left(90)
        forward(n)
        left(90)
        n+=20

main()

 

运行程序截图：

 

6.实验任务6

task6_2.py

程序源代码：

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

def main():
    bgcolor('black')
    color('yellow')
    begin_fill()
    moveto(0,0)
    left(45)
    forward(100)
    left(90)
    circle(100,270)
    left(90)
    forward(100)
    end_fill()
    moveto(15,60)
    color('black')
    begin_fill()
    circle(10,360)
    end_fill()
    moveto(5,55)
    color('white')
    begin_fill()
    circle(2,360)
    end_fill()
hideturtle()
main()

运行程序截图：