条件、循环、函数定义 练习

1、画五角星

import turtle
turtle.bgcolor(‘red‘)
turtle.color(‘yellow‘)
turtle.fillcolor(‘yellow‘)
turtle.begin_fill()

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

turtle.end_fill()

2、画同心圆

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

3、画太阳花

import turtle
turtle.shape(‘turtle‘)
turtle.bgcolor(‘yellow‘)
turtle.color(‘blue‘)
turtle.fillcolor(‘red‘)
turtle.begin_fill()

while True:
    turtle.forward(200)
    turtle.left(140)
if(abs(turtle.pos()))<1:
        break

turtle.end_fill()

4、画五个角星

import turtle
turtle.bgcolor(‘red‘)
turtle.color(‘yellow‘)
turtle.fillcolor(‘yellow‘)
def mygoto(x,y):
    turtle.up()
    turtle.goto(x,y)
    turtle.down()

mygoto(-250,75)
turtle.begin_fill()
for i in range(5):
    turtle.forward(100)
    turtle.right(144)

turtle.end_fill()

mygoto(-100,150)
turtle.begin_fill()
for i in range(5):
    turtle.forward(50)
    turtle.right(144)

turtle.end_fill()

mygoto(-80,80)
turtle.begin_fill()
for i in range(5):
    turtle.forward(50)
    turtle.right(144)

turtle.end_fill()

mygoto(-90,20)
turtle.begin_fill()
for i in range(5):
    turtle.forward(50)
    turtle.right(144)

turtle.end_fill()

mygoto(-110,-30)
turtle.begin_fill()
for i in range(5):
    turtle.forward(50)
    turtle.right(144)

turtle.end_fill()

条件、循环、函数定义 练习

原文：http://www.cnblogs.com/guomeiting/p/7508566.html