题目：绘制下面的图形
Python 海龟绘图 100 题——第 99 题
解析：
绘制曲线九角星。
答案：
方法一
import turtle as t
def youyuanhu(r, n):
for i in range(0,n):
t.fd(0.0174*r)
t.rt(1)
return
def zuoyuanhu(r, n):
for i in range(0,n):
t.fd(0.0174*r)
t.lt(1)
return
def youquxian(r, n):
for i in range(2):
youyuanhu(r, n)
zuoyuanhu(r, n)
return
def zuoquxian(r, n):
for i in range(2):
zuoyuanhu(r, n)
youyuanhu(r, n)
return
t.rt(30)
for i in range(0, 9):
youquxian(20, 100)
t.rt(180-180/9)
方法二
import turtle as t
def yuanhu(r, n):
t.circle(-r, n)
return
def youquxian(r, n):
for i in range(2):
yuanhu(r, n)
yuanhu(-r, n)
return
def zuoquxian(r, n):
for i in range(2):
yuanhu(-r, n)
yuanhu(r, n)
return
t.rt(30)
for i in range(0, 9):
youquxian(20, 100)
t.rt(180-180/9)
