条件、循环、函数定义 练习

前面的代码进行优化，用for,while,if,def实现：

1.画五角星

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

2.画同心圆

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

3.画太阳花

import turtle
turtle.begin_fill()
turtle.fillcolor('pink')
turtle.speed(100)
while True:
    turtle.forward(200)
    turtle.left(170)
    if(abs(turtle.pos()))<1:
        turtle.end_fill()
        break

4.画五个角星

import turtle
turtle.setup(600,400,0,0)
turtle.color("yellow")
turtle.bgcolor("red")
turtle.fillcolor('yellow')
turtle.speed(100)
turtle.begin_fill()
def reposi(x,y):
    turtle.up()
    turtle.goto(x,y)
    turtle.down()

reposi(-250,75)

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

reposi(-130,120)
turtle.begin_fill()
for i in range(5):
    turtle.forward(30);
    turtle.right(144);
turtle.end_fill()

reposi(-110,80)
turtle.begin_fill()
for i in range(5):
    turtle.forward(30);
    turtle.right(144);
turtle.end_fill()

reposi(-110,40)
turtle.begin_fill()
for i in range(5):
    turtle.forward(30);
    turtle.right(144);
turtle.end_fill()

reposi(-130,0)
turtle.begin_fill()
for i in range(5):
    turtle.forward(30);
    turtle.right(144);
turtle.end_fill()