条件、循环、函数定义 练习

1. 画五角星

   import turtle
   
   turtle.color('yellow')
   turtle.bgcolor('red')
   turtle.fillcolor('yellow')
   
   def lh_star(r):
       turtle.begin_fill()
       for i in range(5):
           turtle.forward(r)
           turtle.right(144)
       turtle.end_fill()
   
   lh_star(150)

   

2. 画同心圆

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

   

3. 画太阳花

   import  turtle
   turtle.color('black')
   turtle.fillcolor('red')
   turtle.begin_fill()
   while True:
       turtle.forward(200)
       turtle.left(170)
       if(abs(turtle.pos()))<1:
           break
   turtle.end_fill()

   

4. 画五个五角星

   import turtle
   
   turtle.color('yellow')
   turtle.bgcolor('red')
   turtle.fillcolor('yellow')
   
   def lh_goto(x,y):
       turtle.up()
       turtle.goto(x,y)
       turtle.down()
   
   def lh_star(r):
       turtle.begin_fill()
       for i in range(5):
           turtle.forward(r)
           turtle.right(144)
       turtle.end_fill()
   
   lh_goto(-275,175)
   lh_star(100)
   
   lh_goto(-175,50)
   lh_star(50)
   
   lh_goto(-100,100)
   lh_star(50)
   
   lh_goto(-100,175)
   lh_star(50)
   
   
   lh_goto(-170,250)
   lh_star(50)
   
   turtle.hideturtle()

   

5.  

   画◇花瓣的太阳花

   import  turtle
   turtle.color('white')
   turtle.bgcolor('black')
   turtle.speed(10)
   def lh_ling(a):
       for i in range(2):
           turtle.forward(a)
           turtle.right(30)
           turtle.forward(a)
           turtle.right(150)
   
   for i in range(36):
       lh_ling(50)
       turtle.left(170)
   
   turtle.goto(0,-150)
   turtle.hideturtle()