Python入门_绘制多个五角形_turtle

汇率兑换的程序已经实现了； 

优化： 运行更快； 更简洁

1. turtel 库： 

2. 绘图坐标体系：

https://docs.python.org/3.0/library/turtle.html

import turtle

def draw_wujiao(size):
    count = 1
    while count <= 5:
        turtle.forward(size)
        turtle.right(144)
        count = count + 1

def main():
    #循环的魅力，可以循环多次实现相同的操作
    turtle.penup()
    turtle.backward(200)
    turtle.pendown()
    turtle.pensize(2)
    turtle.pencolor('red')

    size = 50
    while size <= 60:
     draw_wujiao(size)
     size += 10

    turtle.exitonclick()

if __name__ == '__main__':
    main()

 3.递归函数：调用自身函数的函数