条件、循环、函数定义 练习

1,画五角星

import turtle
turtle.bgcolor('red')
turtle.fillcolor('yellow')
turtle.begin_fill()
for i in range(5):
turtle.forward(100)
turtle.left(144)

turtle.end_fill()

2,画同心圆

import turtle
for i in range(5):
turtle.up()
turtle.goto(0,-20*(i+1))
turtle.down()
turtle.circle(20*(i+1))
turtle.write(10-i)

3,画太阳花

import turtle
turtle.color('blue')
turtle.fillcolor('yellow')
turtle.begin_fill()
while True:
turtle.forward(100)
turtle.left(138)
if (abs(turtle.pos()))<1:
break

turtle.end_fill()

4,画五个角星

import turtle
turtle.bgcolor('red')
turtle.fillcolor('yellow')
turtle.begin_fill()
for i in range(5):
turtle.forward(100)
turtle.left(144)
turtle.end_fill()

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

def hh(r):
turtle.begin_fill()
for i in range(5):
turtle.forward(50)
turtle.left(144)
turtle.end_fill()
h(100,100)
hh(1)
h(150,50)
hh(2)
h(150,0)
hh(3)
h(100,-50)
hh(4)