条件、循环、函数定义练习

1. 画五角星

   import turtle
   for i in range(5):
       turtle.forward(50)
       turtle.right(144)

   

    

    

2. 画同心圆

   import turtle
   for i in range(5):
       turtle.up()
       turtle.goto(50,-20*(i+1))
       turtle.down()
       turtle.circle(20*(i+1))

   

    

   
   

    

    

3. 画太阳花

   import turtle
   while True:
       turtle.forward(200)
       turtle.right(165)
   if(abs(turtle.pos()))<1:
   break
   

    

    

4. 画五个五角星

   import turtle
   turtle.bgcolor("red")
   turtle.fillcolor("yellow")
   turtle.color("yellow")
   
   def add(x,y):
       turtle.up()
       turtle.goto(x,y)
       turtle.down()
   
   def draw1(z):
       turtle.begin_fill()
   for i in range(5):
           turtle.forward(z)
           turtle.right(144)
       turtle.end_fill()
   
   add(-200,60)
   draw1(100)
   
   add(-90,155)
   draw1(50)
   
   add(-50,102.5)
   draw1(50)
   
   add(-50,28.5)
   draw1(50)
   
   add(-90,-20)
   draw1(50)

   
5. 画◇花瓣的太阳花。

   import turtle
   turtle.bgcolor("orange")
   
   turtle.color("white")
   turtle.speed(10)   
   
   
   for i in range(1,37):
   for i in range(1,3):
           turtle.forward(50)
           turtle.right(45)
           turtle.forward(50)
           turtle.right(135)
       turtle.left(10)
   
   turtle.right(90)
   turtle.forward(300)