# 条件、循环、函数定义 习题

www.MyException.Cn  网友分享于：2013-09-19  浏览：0次

1. 注意标准库的两种导入与使用方式，建议大家采用<库名>.<函数名>的方式。
2. 对前面的代码进行优化，用for,while,if,def实现：

1.画五角星

import turtle
turtle.setup(600,400,0,0)
turtle.color('yellow')
turtle.bgcolor('red')
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()

2.画同心圆

import turtle

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

3.画太阳花

import turtle
turtle.bgcolor('pink')
turtle.color('yellow')
turtle.fillcolor('red')

turtle.begin_fill()
while True:
turtle.forward(200)
turtle.left(150)
if(abs(turtle.pos()))<1:
break
turtle.end_fill()
done()

4.画五个角星

import turtle
turtle.setup(600,400,0,0)
turtle.color('yellow')
turtle.bgcolor('red')
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(-130,150)

turtle.begin_fill()
for i in range(5):
turtle.forward(40)
turtle.right(144)
turtle.end_fill()

mygoto(-70,110)

turtle.begin_fill()
for i in range(5):
turtle.forward(40)
turtle.right(144)
turtle.end_fill()

mygoto(-80,35)

turtle.begin_fill()
for i in range(5):
turtle.forward(40)
turtle.right(144)
turtle.end_fill()

mygoto(-130,-25)

turtle.begin_fill()
for i in range(5):
turtle.forward(40)
turtle.right(144)
turtle.end_fill()