条件、循环、函数定义 练习

 1同心圆

import turtle
for i in range(5):
    turtle.penup()
    turtle.goto(0,-20*i)
    turtle.pendown()
    turtle.circle(20*(1+i))
turtle.done()

 

2.五角星
import turtle
for i in range(5):
    turtle.forward(122)
    turtle.right(144)
turtle.done()

 

3。五星红旗
from turtle import*
color ('yellow')
bgcolor('red')
def my_goto(x,y):
    penup()
    goto(x,y)
    pendown()

def my_5(f):
    begin_fill()
    for i  in range(5):
        forward(f)
        right(144)
    end_fill()
    
my_goto(-700,250)
my_5(150)

my_goto(-400,300)
my_5(50)

my_goto(-400,180)
my_5(50)

my_goto(-500,400)
my_5(50)

my_goto(-500,80)
my_5(50)

done()

 

4.太阳花

from turtle import*
color ('yellow')
bgcolor('red')
def my_0():
    for i in range(2):
        forward(60)
        left(60)
        forward(60)
        left(120)
for i in range(1,45):
    my_0()
    left(10)
left(180)
forward(333)
done()

 

 

5.有菱形花瓣的太阳花

 

from turtle import*
color ('yellow')
bgcolor('red')
begin_fill()
while True:
    forward(233)
    right(130)
    if (abs(pos()))<1:
        break
end_fill()    
done()