条件、循环、函数定义 练习

a.画五角星

import turtle

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

turtle.hideturtle()

b.画同心圆

import turtle

for i in range(8):
    turtle.up()
    turtle.goto(0,-20*(i+1))
    turtle.down()
    turtle.circle(20*(i+1))
   
turtle.hideturtle()

c.画太阳花

import turtle

turtle.fillcolor('yellow')

turtle.begin_fill()
while True:
    turtle.forward(100)
    turtle.right(150)
    if(abs(turtle.pos()))<1:
       break
turtle.end_fill()

turtle.hideturtle()

d.画五个五角星

import turtle

turtle.speed(100)
turtle.setup(600,400,0,0)
turtle.color('yellow')
turtle.bgcolor('red') 
turtle.fillcolor('yellow')

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

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

my_goto(-350,200)
wu(100)

my_goto(-175,260)
wu(50)

my_goto(-125,210)
wu(50)

my_goto(-125,150)
wu(50)

my_goto(-175,85)
wu(50)

turtle.hideturtle()

e.画◇花瓣的太阳花

import turtle

turtle.color('red')
turtle.fillcolor('yellow')
turtle.begin_fill()
for i in range(1,19):
    for i in range(1,3):
        turtle.forward(100)
        turtle.right(45)
        turtle.forward(100)
        turtle.right(135)
    turtle.left(20)
turtle.end_fill()
turtle.right(90)
turtle.forward(400)

turtle.hideturtle()