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.left(144)
turtle.hideturtle()

2.画同心圆

import turtle


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

3.画太阳花

import turtle


while True:
    turtle.forward(200)
    turtle.left(170)
    if(abs(turtle.pos()))<1:
        break
turtle.hideturtle()

4.画五个五角星

import turtle


def my5star(x):
    for i in range(5):
        turtle.forward(x)
        turtle.right(144)

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

mylocal(-380,250)
my5star(100)

mylocal(-270,290)
my5star(25)

mylocal(-240,260)
my5star(25)

mylocal(-240,230)
my5star(25)

mylocal(-270,200)
my5star(25)
turtle.hideturtle()

5.画◇花瓣的太阳花。

import turtle
turtle.speed('fastest')
def sunflower():
    for i in range(2):
        turtle.forward(100)
        turtle.right(60)
        turtle.forward(100)
        turtle.right(120)

for i in range(1,37):
    sunflower()
    turtle.right(10)
turtle.right(90) 
turtle.forward(250)

turtle.hideturtle()