条件、循环、函数定义 练习

1、画五角星

import turtle

for i in range(5):
    turtle.forward(100)
    turtle.right(144)

 

2、画同心圆

from turtle import *

for i in range(5):
    up()
    goto(0,-20*(i+1))
    down()
    circle(20*(i+1))

 

3、画太阳花

from turtle import *

color('black','gray')
begin_fill()
while True:
    forward(200)
    left(170)
    if(abs(pos()))<1:
        break
end_fill()
done()

 

4、画五个五角星

import turtle

turtle.speed(10)
turtle.color('yellow')
turtle.bgcolor('red')
turtle.fillcolor('yellow')

def my_goto(x,y):
    turtle.up()
    turtle.goto(x,y)
    turtle.down()

def my_draw5(r):
    turtle.begin_fill()
    for i in range(5):
        turtle.forward(r)
        turtle.right(144)
    turtle.end_fill()

my_goto(-300,150)
my_draw5(120)

my_goto(-80,250)
my_draw5(50)

my_goto(-75,170)
my_draw5(50)

my_goto(-80,80)
my_draw5(50)

my_goto(-90,10)
my_draw5(50)

 

5、画◇花瓣的太阳花。

from turtle import *

color('black','gray')
begin_fill()
speed(10)

for i in range(36):
    while True:
        forward(100)
        left(50)
        forward(100)
        left(130)
        forward(100)
        left(50)
        forward(100)
        if(abs(pos()))<1:
            break
end_fill()
done()