条件循环函数定义 练习

Posted 2020-10-06 yishhaoo

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。
对前面的代码进行优化，用for,while,if,def实现：
画五角星
import turtle
from turtle import *
turtle.color(\'yellow\',\'yellow\')
turtle.begin_fill()
for i in range(5):
    turtle.forward(200)
    turtle.left(-144)
turtle.end_fill()

 

画同心圆
import turtle

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

 

画太阳花
import turtle
from turtle import *
turtle.speed(100)
turtle.color(\'blue\',\'yellow\')
turtle.begin_fill()
while True:
    turtle.forward(200)
    turtle.left(170)
    if(abs(turtle.pos()))<1:
        break
turtle.end_fill()

 

画五个角星

import turtle
turtle.speed(10)
def yidong(x,y):
    turtle.up()
    turtle.goto(x,y)
    turtle.down()
def wujiaoxing(r):
    turtle.begin_fill()
    for i in range(5):
        turtle.forward(r)
        turtle.left(-144)
    turtle.end_fill()
turtle.bgcolor("red")
turtle.color("yellow","yellow")
yidong(-300,240)

yidong(-263,163)

wujiaoxing(100)
yidong(-126,211)
wujiaoxing(20)
yidong(-100,160)
wujiaoxing(20)
yidong(-107,116)
wujiaoxing(20)
yidong(-133,95)
wujiaoxing(20)