条件、循环、函数定义 练习

1. 画五角星

   import turtle
   turtle.shape("turtle")
   turtle.color("yellow")
   turtle.bgcolor("red")
   turtle.fillcolor("yellow")
   turtle.begin_fill()
   for i in range(5):
       turtle.forward(100)
       turtle.right(144)
   turtle.end_fill()
   turtle.hideturtle()

    

2. 画同心圆

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

    

3. 画太阳花

   import turtle
   turtle.shape("turtle")
   turtle.color('red')
   turtle.fillcolor('yellow')
   turtle.bgcolor('pink')
   turtle.begin_fill()
   while True:
       turtle.forward(200)
       turtle.right(150)
       if(abs(turtle.pos()))<1:
          break
   turtle.end_fill（）
   turtle.hideturtle()
   

   

    

4. 画五个五角星

   import turtle
   turtle.shape("turtle")
   turtle.fillcolor("yellow")
   turtle.color("yellow")
   turtle.bgcolor("red")
   
   
   def my_goto(x,y):
       turtle.up()
       turtle.goto(x,y)
       turtle.down
   
   
   def my_draw(r):
       turtle.begin_fill()
       for i in range(5):
           turtle.forward(r)
           turtle.right(144)
       turtle.end_fill()
       turtle.hideturtle()
   
   my_goto(-390,270)
   my_draw(100)
   
   
   my_goto(-300,320)
   my_draw(50)
   
   my_goto(-250,270)
   my_draw(50)
   
   my_goto(-250,220)
   my_draw(50)
   
   
   my_goto(-300,170)
   my_draw(50)

   

5. 画◇花瓣的太阳花。

   import turtle
   turtle.shape("turtle")
   turtle.color('red')
   turtle.fillcolor('yellow')
   turtle.bgcolor('pink')
   turtle.begin_fill()
   for i in range(1,19):
       for i in range(1,3):
           turtle.forward(100)
           turtle.right(45)
           turtle.forward(100)
           turtle.right(135)
       turtle.left(20)
   turtle.end_fill()
   turtle.right(90)
   turtle.forward(300)